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Index of Common Names

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A B C D E F G H I J K L M N O P Q R S T U V W Y Z


acacia, prairie (Acaciella angustissima)
acacia, rose (Robinia hispida)
Adam and Eve (Aplectrum hyemale)
Adam and Eve orchid (Aplectrum hyemale)
ageratum, wild (Conoclinium coelestinum)
agrimony, beaked (Agrimonia rostellata)
agrimony, downy (Agrimonia pubescens)
agrimony, many-flowered (Agrimonia parviflora)
agrimony, soft (Agrimonia pubescens)
agrimony, swamp (Agrimonia parviflora)
agrimony, woodland (Agrimonia rostellata)
ague-weed (Gentianella quinquefolia)
agueweed (Gentianella quinquefolia)
alder, common (Alnus serrulata)
alder, hazel (Alnus serrulata)
alder, smooth (Alnus serrulata)
alder, tag (Alnus serrulata)
Alexanders, common golden (Zizia aurea)
alfalfa (Medicago sativa)
alfilaria (Erodium cicutarium)
alkanet, bastard (Buglossoides arvensis)
Allegheny blackberry (Rubus allegheniensis)
Allegheny monkey flower (Mimulus ringens)
Allegheny monkeyflower (Mimulus ringens)
alligator-flag, powdery (Thalia dealbata)
allspice, Carolina (Calycanthus floridus)
aloe, false (Manfreda virginica)
Alsike clover (Trifolium hybridum)
alsike clover (Trifolium hybridum)
alumroot, Richardson's (Heuchera richardsonii)
alyssum, hoary (Berteroa incana)
amaranth, green (Amaranthus hybridus)
amaranth, slim (Amaranthus hybridus)
amaranth, spiny (Amaranthus spinosus)
amaranth, thorny (Amaranthus spinosus)
Amazon sprangletop (Leptochloa panicoides)
amberique bean (Strophostyles helvola)
amberique-bean (Strophostyles helvola)
American basswood (Tilia americana)
American beautyberry (Callicarpa americana)
American beech (Fagus grandifolia)
American bellflower (Campanula americana)
American bittersweet (Celastrus scandens)
American black elderberry (Sambucus canadensis)
American black nightshade (Solanum americanum)
American bladdernut (Staphylea trifolia)
American bluehearts (Buchnera americana)
American buckwheat vine (Brunnichia ovata)
American bugleweed (Lycopus americanus)
American bur-reed (Sparganium americanum)
American burnweed (Erechtites hieraciifolius)
American Christmas mistletoe (Phoradendron leucarpum)
American columbo (Frasera caroliniensis)
American cowslip (Primula meadia)
American false pennyroyal (Hedeoma pulegioides)
American featherfoil (Hottonia inflata)
American feverfew (Parthenium hispidum)
American feverfew (Parthenium integrifolium)
American frogbit (Limnobium spongia)
American germander (Teucrium canadense)
American ginseng (Panax quinquefolius)
American gromwell (Lithospermum latifolium)
American hogpeanut (Amphicarpaea bracteata)
American hydrangea (Hydrangea arborescens)
American ipecac (Gillenia stipulata)
American lopseed (Phryma leptostachya)
American lotus (Nelumbo lutea)
American plum (Prunus americana)
American pokeweed (Phytolacca americana)
American potato bean (Apios americana)
American spikenard (Aralia racemosa)
American spongeplant (Limnobium spongia)
American stoneseed (Lithospermum latifolium)
American water horehound (Lycopus americanus)
American water-willow (Justicia americana)
American white waterlily (Nymphaea odorata)
American wisteria (Wisteria frutescens)
American witch-hazel (Hamamelis virginiana)
American witchhazel (Hamamelis virginiana)
ampelopsis, heartleaf (Ampelopsis cordata)
amsonia, willow (Amsonia tabernaemontana)
Amur honeysuckle (Lonicera maackii)
anemone, Canadian (Anemone canadensis)
anemone, eastern false rue (Isopyrum biternatum)
anemone, false rue (Isopyrum biternatum)
anemone, meadow (Anemone canadensis)
anemone, rue (Thalictrum thalictroides)
anemone, white (Anemone canadensis)
angelica, hairy (Angelica venenosa)
angelica, wood (Angelica venenosa)
angelico (Ligusticum canadense)
angle-pod (Gonolobus suberosus)
anglestem primrose-willow (Ludwigia leptocarpa)
angularfruit milkvine (Gonolobus suberosus)
anise root (Osmorhiza longistylis)
anise, sweet (Osmorhiza longistylis)
annual bedstraw (Galium aparine)
annual bluegrass (Poa annua)
annual fleabane (Erigeron annuus)
annual ground cherry (Physalis pubescens)
annual knawel (Scleranthus annuus)
annual marsh elder (Iva annua)
annual ragweed (Ambrosia artemisiifolia)
annual silver hairgrass (Aira elegans)
annual wormwood (Artemisia annua)
anoda, crested (Anoda cristata)
anoda, spurred (Anoda cristata)
antelopehorn, green (Asclepias viridis)
Appalachian blazing star (Liatris squarrulosa)
apple, May (Podophyllum peltatum)
apple, narrow-leaved crab (Malus angustifolia)
apple, southern crab (Malus angustifolia)
apricot vine (Passiflora incarnata)
aquatic milkweed (Asclepias perennis)
Arkansas bedstraw (Galium arkansanum)
Arkansas calamint (Clinopodium arkansanum)
Arkansas ironweed (Vernonia arkansana)
Arkansas leastdaisy (Chaetopappa asteroides)
aromatic aster (Symphyotrichum oblongifolium)
aromatic sumac (Rhus aromatica)
arrow-leaved tear-thumb (Persicaria sagittata)
arrowhead (Sagittaria platyphylla)
arrowhead rattlebox (Crotalaria sagittalis)
arrowhead, broadleaf (Sagittaria latifolia)
arrowhead, common (Sagittaria latifolia)
arrowhead, delta (Sagittaria platyphylla)
arrowhead, hooded (Sagittaria calycina)
arrowhead, midwestern (Sagittaria brevirostra)
arrowhead, Mississippi (Sagittaria calycina)
arrowhead, shortbeak (Sagittaria brevirostra)
arrowleaf tearthumb (Persicaria sagittata)
arrowwood, leatherleaf (Viburnum rhytidophyllum)
arrowwood, southern (Viburnum dentatum)
artichoke, Jerusalem (Helianthus tuberosus)
ash, stinking (Ptelea trifoliata)
ashy sunflower (Helianthus mollis)
Asiatic dayflower (Commelina communis)
asparagus (Asparagus officinalis)
asparagus, garden (Asparagus officinalis)
aster (Symphyotrichum anomalum)
aster, aromatic (Symphyotrichum oblongifolium)
aster, azure (Symphyotrichum oolentangiense)
aster, blue wood (Symphyotrichum cordifolium)
aster, common blue wood (Symphyotrichum cordifolium)
aster, Drummond (Symphyotrichum drummondii)
aster, Drummond's (Symphyotrichum drummondii)
aster, eastern annual saltmarsh (Symphyotrichum subulatum)
aster, false (Boltonia asteroides)
aster, flax-leaved (Ionactis linariifolia)
aster, flaxleaf whitetop (Ionactis linariifolia)
aster, freeway (Symphyotrichum subulatum)
aster, glossy-leaved (Symphyotrichum puniceum)
aster, golden (Heterotheca camporum var. camporum)
aster, golden (Heterotheca camporum var. glandulissima)
aster, hairy white oldfield (Symphyotrichum pilosum)
aster, inland saltmarsh (Symphyotrichum subulatum)
aster, late purple (Symphyotrichum patens)
aster, manyray (Symphyotrichum anomalum)
aster, Mexican (Cosmos bipinnatus)
aster, New England (Symphyotrichum novae-angliae)
aster, oblong-leaved (Symphyotrichum oblongifolium)
aster, panicled (Symphyotrichum lanceolatum)
aster, prairie (Symphyotrichum turbinellum)
aster, purplestem (Symphyotrichum puniceum)
aster, silky (Symphyotrichum sericeum)
aster, single-stemmed bog (Eurybia hemispherica)
aster, skyblue (Symphyotrichum oolentangiense)
aster, smooth violet prairie (Symphyotrichum turbinellum)
aster, sneezewort (Solidago ptarmicoides)
aster, southern prairie (Eurybia hemispherica)
aster, spreading (Symphyotrichum patens)
aster, stiff (Ionactis linariifolia)
aster, stiff-leaved (Ionactis linariifolia)
aster, tall white (Symphyotrichum lanceolatum)
aster, western silver (Symphyotrichum sericeum)
aster, white heath (Symphyotrichum pilosum)
aster, white panicle (Symphyotrichum lanceolatum)
aster, white upland (Solidago ptarmicoides)
aster, willow-leaved (Symphyotrichum praealtum)
aster, willowleaf (Symphyotrichum praealtum)
Atlantic camas (Camassia scilloides)
Atlantic mock bishop's weed (Ptilimnium capillaceum)
Atlantic pigeonwings (Clitoria mariana)
Atlantic poison oak (Toxicodendron pubescens)
Aunt Lucy (Ellisia nyctelea)
autumn olive (Elaeagnus umbellata)
autumn onion (Allium stellatum)
autumn sneezeweed (Helenium autumnale)
avens, cream (Geum virginianum)
avens, early water (Geum vernum)
avens, pale (Geum virginianum)
avens, rough (Geum laciniatum)
avens, spring (Geum vernum)
avens, white (Geum canadense)
axilflower (Mecardonia acuminata)
azure aster (Symphyotrichum oolentangiense)
azure blue sage (Salvia azurea)
azure bluet (Houstonia caerulea)
bachelor's button (Centaurea cyanus)
Baldwin's ironweed (Vernonia baldwinii)
Baldwin's milkvine (Matelea baldwyniana)
Balkan catchfly (Silene csereii)
balloon vine (Cardiospermum halicacabum)
balm, horse (Collinsonia canadensis)
balsam (Impatiens balsamina)
balsam, garden (Impatiens balsamina)
balsam, old-field (Pseudognaphalium obtusifolium)
bamboo, Japanese (Fallopia japonica)
bamboo, Mexican (Fallopia japonica)
baneberry, black (Actaea racemosa)
baneberry, white (Actaea pachypoda)
barberry, hollyleaved (Mahonia aquifolium)
barley (Hordeum vulgare)
barley, beardless (Hordeum vulgare)
barley, common (Hordeum vulgare)
barley, little (Hordeum pusillum)
barley, pearl (Hordeum vulgare)
barnyard grass (Echinochloa crus-galli)
barnyardgrass (Echinochloa crus-galli)
bashful brier (Mimosa quadrivalvis var. nuttallii)
basil (Ocimum basilicum)
basil, lemon (Ocimum basilicum)
basil, sweet (Ocimum basilicum)
basil, wild (Perilla frutescens)
basswood, American (Tilia americana)
bastard alkanet (Buglossoides arvensis)
bastard pennyroyal (Trichostema dichotomum)
bastard toadflax (Comandra umbellata)
beach false foxglove (Agalinis fasciculata)
bead, jet (Rhodotypos scandens)
beaked agrimony (Agrimonia rostellata)
beaked cornsalad (Valerianella radiata)
beaked hawkweed (Hieracium gronovii)
beaked rush (Rhynchospora globularis)
beaksedge, globe (Rhynchospora globularis)
bean, amberique (Strophostyles helvola)
bean, American potato (Apios americana)
bean, castor (Ricinus communis)
bean, Indian (Catalpa speciosa)
bean, slickseed wild (Strophostyles leiosperma)
bean, snout (Rhynchosia latifolia)
bean, thicket (Phaseolus polystachios)
bean, wild (Phaseolus polystachios)
bean, wild (Strophostyles helvola)
bean, wild (Strophostyles umbellata)
beard, goat's (Aruncus dioicus)
beard, old man's (Chionanthus virginicus)
beard-tongue, cobaea (Penstemon cobaea)
beard-tongue, pale (Penstemon pallidus)
beard-tongue, smooth (Penstemon digitalis)
beard-tongue, tall white (Penstemon digitalis)
beard-tongue, trumpet (Penstemon tubaeflorus)
bearded beggarticks (Bidens aristosa)
bearded flatsedge (Cyperus squarrosus)
bearded shorthusk (Brachyelytrum erectum)
beardgrass, silver (Bothriochloa laguroides)
beardless barley (Hordeum vulgare)
beardtongue, cobaea (Penstemon cobaea)
beardtongue, foxglove (Penstemon digitalis)
beardtongue, pale (Penstemon pallidus)
beardtongue, white wand (Penstemon tubaeflorus)
bearsfoot (Smallanthus uvedalia)
beauty, meadow (Rhexia mariana)
beauty, Rutland (Calystegia sepium)
beauty, spring (Claytonia virginica)
beauty, Virginia spring (Claytonia virginica)
beauty, wing-stemmed meadow (Rhexia virginica)
beautyberry (Callicarpa americana)
beautyberry, American (Callicarpa americana)
bedstraw (Galium pedemontanum)
bedstraw, annual (Galium aparine)
bedstraw, Arkansas (Galium arkansanum)
bedstraw, blunt-leaved (Galium obtusum)
bedstraw, bluntleaf (Galium obtusum)
bedstraw, forest (Galium circaezans)
bedstraw, fragrant (Galium triflorum)
bedstraw, hairy (Galium pilosum)
bedstraw, licorice (Galium boreale)
bedstraw, licorice (Galium circaezans)
bedstraw, northern (Galium boreale)
bedstraw, piedmont (Galium pedemontanum)
bedstraw, shining (Galium concinnum)
bedstraw, southern three-lobed (Galium tinctorium)
bedstraw, southwestern (Galium virgatum)
bedstraw, stiff marsh (Galium tinctorium)
bedstraw, sweetscented (Galium odoratum)
beebalm (Monarda didyma)
beebalm (Monarda bradburiana)
beebalm, Bradbury (Monarda bradburiana)
beebalm, dotted (Monarda punctata)
beebalm, eastern (Monarda bradburiana)
beebalm, lemon (Monarda citriodora)
beebalm, scarlet (Monarda didyma)
beebalm, spotted (Monarda punctata)
beeblossom, longflower (Oenothera filiformis)
beech, American (Fagus grandifolia)
beechdrops (Epifagus virginiana)
beefsteak plant (Perilla frutescens)
beefsteakplant (Perilla frutescens)
beeplant, Rocky Mountain (Cleome serrulata)
beggar ticks (Bidens frondosa)
beggar ticks (Bidens tripartita)
beggar ticks (Bidens vulgata)
beggar's lice (Hackelia virginiana)
beggarslice (Hackelia virginiana)
beggartick, big devils (Bidens vulgata)
beggartick, devil's (Bidens frondosa)
beggartick, nodding (Bidens cernua)
beggarticks, bearded (Bidens aristosa)
beggarticks, small (Bidens discoidea)
beggarticks, threelobe (Bidens tripartita)
bellflower, American (Campanula americana)
bellflower, bluebell (Campanula rotundifolia)
bellflower, creeping (Campanula rapunculoides)
bellflower, rampion (Campanula rapunculoides)
bellflower, rover (Campanula rapunculoides)
bellflower, tall (Campanula americana)
bellwort (Uvularia grandiflora)
bellwort, large (Uvularia grandiflora)
bellwort, largeflower (Uvularia grandiflora)
bellwort, sessileleaf (Uvularia sessilifolia)
bellwort, small (Uvularia sessilifolia)
bent milk vetch (Astragalus distortus)
bequilla (Sesbania herbacea)
bergamot, wild (Monarda fistulosa)
Bermuda grass (Cynodon dactylon)
Bermudagrass (Cynodon dactylon)
berry, June (Amelanchier arborea)
berry, partridge (Mitchella repens)
berry, sarviss (Amelanchier arborea)
berry, twin (Mitchella repens)
Bethlehem, drooping star of (Ornithogalum nutans)
Bethlehem, star of (Ornithogalum nutans)
Bethlehem, star of (Ornithogalum umbellatum)
betony, marsh (Stachys pilosa)
betony, slenderleaf (Stachys tenuifolia)
betony, swamp wood (Pedicularis lanceolata)
betony, thinleaf (Stachys tenuifolia)
betony, wood (Pedicularis canadensis)
betonyleaf noseburn (Tragia betonicifolia)
big blue lobelia (Lobelia puberula)
big bluestem (Andropogon gerardi)
big bluets (Houstonia caerulea)
big devils beggartick (Bidens vulgata)
big mock bishop's weed (Ptilimnium costatum)
big-flowered gerardia (Aureolaria grandiflora)
big-seeded scorpiongrass (Myosotis macrosperma)
bigbract verbena (Verbena bracteata)
bigflower coreopsis (Coreopsis grandiflora)
bigflower vetch (Vicia grandiflora)
bigfruit evening primrose (Oenothera macrocarpa ssp. macrocarpa)
bigleaf magnolia (Magnolia macrophylla)
bigleaf periwinkle (Vinca major)
bigpod sesbania (Sesbania herbacea)
bigroot morning glory (Ipomoea pandurata)
bill, bird's (Primula meadia)
bill, Carolina crane's (Geranium carolinianum)
bill, cutleaf crane's (Geranium dissectum)
bill, dovesfoot crane's (Geranium molle)
bill, prairie rooster (Primula meadia)
bill, redstem stork's (Erodium cicutarium)
bill, small crane's (Geranium pusillum)
bill, spotted crane's (Geranium maculatum)
billion dollar grass (Echinochloa crus-galli)
bindweed, black (Fallopia convolvulus)
bindweed, field (Convolvulus arvensis)
bindweed, hedge (Calystegia sepium)
bindweed, hedge (Calystegia silvatica)
bindweed, hedge false (Calystegia sepium)
bindweed, shortstalk false (Calystegia silvatica)
bindweed, small (Convolvulus arvensis)
birch, red (Betula nigra)
birch, river (Betula nigra)
bird's bill (Primula meadia)
bird's foot trefoil (Lotus corniculatus)
bird's foot violet (Viola pedata)
bird's-eye speedwell (Veronica persica)
bird's-foot trefoil (Lotus corniculatus)
birdeye speedwell (Veronica persica)
birdfoot violet (Viola pedata)
biscuitroot, desert (Lomatium foeniculaceum)
Bishop clover (Trifolium campestre)
bishop's cap (Mitella diphylla)
bishop's goutweed (Aegopodium podagraria)
bishopweed, ribbed mock (Ptilimnium costatum)
bite, devil's (Liatris scariosa)
bitter cress (Cardamine pensylvanica)
bitter dock (Rumex obtusifolius)
bitter sneezeweed (Helenium amarum)
bitter weed (Ambrosia artemisiifolia)
bittercress, bulbous (Cardamine bulbosa)
bittercress, hairy (Cardamine hirsuta)
bittercress, limestone (Cardamine douglassii)
bittercress, Pennsylvania (Cardamine pensylvanica)
bittercress, sand (Cardamine parviflora)
bittersweet, American (Celastrus scandens)
bittersweet, Oriental (Celastrus orbiculatus)
bitterweed (Helenium amarum)
bitterwseet (Solanum dulcamara)
black baneberry (Actaea racemosa)
black bindweed (Fallopia convolvulus)
black cherry (Prunus serotina)
black chokeberry (Aronia melanocarpa)
black cohosh (Actaea racemosa)
black locust (Robinia pseudoacacia)
black medick (Medicago lupulina)
black mustard (Brassica nigra)
black nightshade (Solanum americanum)
black raspberry (Rubus occidentalis)
black snakereoot (Sanicula canadensis)
black snakeroot (Sanicula odorata)
black snakeroot (Sanicula smallii)
black snakeroot (Actaea racemosa)
black walnut (Juglans nigra)
black-eyed Susan (Rudbeckia hirta)
blackberry lily (Belamcanda chinensis)
blackberry, Allegheny (Rubus allegheniensis)
blackberry, highbush (Rubus argutus)
blackberry, sawtooth (Rubus argutus)
blackeyed Susan (Rudbeckia hirta)
blackhaw (Viburnum prunifolium)
blackhaw, rusty (Viburnum rufidulum)
blackhaw, southern (Viburnum rufidulum)
blackseed plantain (Plantago rugelii)
blacksnakeroot, Canadian (Sanicula canadensis)
blacksnakeroot, clustered (Sanicula odorata)
blacksnakeroot, Small's (Sanicula smallii)
bladder campion (Silene vulgaris ssp. vulgaris)
bladder catchfly (Silene vulgaris ssp. vulgaris)
bladderfern, lowland (Cystopteris protrusa)
bladdernut, American (Staphylea trifolia)
bladderwort, common (Utricularia vulgaris)
bladderwort, greater (Utricularia vulgaris)
blanket, Indian (Castilleja coccinea)
blanket, Indian (Gaillardia pulchella)
blanketflower, lanceleaf (Gaillardia aestivalis)
blazing star (Liatris cylindracea)
blazing star (Liatris scariosa)
blazing star (Liatris squarrosa)
blazing star (Liatris squarrulosa)
blazingstar, bractless (Mentzelia nuda)
blazingstar, wavyleaf (Mentzelia albescens)
blisterwort (Ranunculus recurvatus)
blood polygala (Polygala sanguinea)
bloodleaf (Iresine rhizomatosa)
bloodroot (Sanguinaria canadensis)
bloody butcher (Trillium recurvatum)
blue boneset (Conoclinium coelestinum)
blue bottle (Centaurea cyanus)
blue cardinal flower (Lobelia puberula)
blue cardinal flower (Lobelia siphilitica)
blue cardinal flower (Lobelia siphilitica)
blue cohosh (Caulophyllum thalictroides)
blue curls (Trichostema dichotomum)
blue curls (Trichostema setaceum)
blue devil (Echium vulgare)
blue devil (Symphyotrichum oolentangiense)
blue false indigo (Baptisia australis)
blue fieldmadder (Sherardia arvensis)
blue flag (Iris germanica)
blue grama (Bouteloua gracilis)
blue hearts (Buchnera americana)
blue jasmine (Clematis crispa)
blue lobelia (Lobelia siphilitica)
blue lobelia (Lobelia siphilitica)
blue mistflower (Conoclinium coelestinum)
blue morning glory (Ipomoea hederacea)
blue mudplantain (Heteranthera limosa)
blue mustard (Chorispora tenella)
blue phlox (Phlox divaricata)
Blue Ridge blueberry (Vaccinium pallidum)
Blue Ridge carrionflower (Smilax lasioneura)
blue sage (Salvia azurea)
blue sailors (Cichorium intybus)
blue sedge (Carex glaucodea)
blue skullcap (Scutellaria lateriflora)
blue star (Amsonia tabernaemontana)
blue thistle (Echium vulgare)
blue toadflax (Nuttallanthus canadensis)
blue vervain (Verbena hastata)
blue vine (Cynanchum laeve)
blue waxweed (Cuphea viscosissima)
blue wild indigo (Baptisia australis)
blue wood aster (Symphyotrichum cordifolium)
blue-eyed grass (Sisyrinchium albidum)
blue-eyed Mary (Collinsia verna)
bluebell (Campanula rotundifolia)
bluebell (Clematis pitcheri)
bluebell bellflower (Campanula rotundifolia)
bluebell, English (Hyacinthoides non-scripta)
bluebells (Mertensia virginica)
bluebells, Virginia (Mertensia virginica)
blueberry, Blue Ridge (Vaccinium pallidum)
blueberry, hillside (Vaccinium pallidum)
blueberry, lowbush (Vaccinium pallidum)
bluebill (Clematis pitcheri)
bluecurls, forked (Trichostema dichotomum)
bluecurls, narrowleaf (Trichostema setaceum)
bluegrass, annual (Poa annua)
bluegrass, bulbous (Poa bulbosa)
bluegrass, Kentucky (Poa pratensis)
bluehearts, American (Buchnera americana)
bluejacket (Tradescantia ohiensis)
bluestar, eastern (Amsonia tabernaemontana)
bluestar, fringed (Amsonia ciliata)
bluestar, Ozark (Amsonia illustris)
bluestem pricklypoppy (Argemone albiflora)
bluestem, big (Andropogon gerardi)
bluestem, silver (Bothriochloa laguroides)
bluet, azure (Houstonia caerulea)
bluet, longleaf summer (Houstonia longifolia)
bluet, tiny (Houstonia pusilla)
bluets, big (Houstonia caerulea)
bluets, broad-leaved (Houstonia purpurea)
bluets, long-leaved (Houstonia longifolia)
bluets, narrow-leaved (Houstonia nigricans)
bluets, slender-leaved (Houstonia longifolia)
bluets, small (Houstonia pusilla)
blueweed (Echium vulgare)
blunt-leaved bedstraw (Galium obtusum)
blunt-leaved dock (Rumex obtusifolius)
blunt-leaved spurge (Euphorbia obtusata)
bluntleaf bedstraw (Galium obtusum)
bluntleaf milkweed (Asclepias amplexicaulis)
bluntleaf waterleaf (Hydrophyllum canadense)
bog rush (Juncus effusus)
bog yellow cress (Rorippa palustris var. fernaldiana)
boneset (Eupatorium perfoliatum)
boneset, blue (Conoclinium coelestinum)
boneset, common (Eupatorium perfoliatum)
boneset, false (Brickellia eupatorioides)
boneset, late (Eupatorium serotinum)
boneset, upland (Eupatorium sessilifolium)
border privet (Ligustrum obtusifolium)
Bosc's panicgrass (Panicum boscii)
bottle gentian (Gentiana andrewsii)
bottle, blue (Centaurea cyanus)
bottlebrush buckeye (Aesculus parviflora)
bottlebrush grass (Elymus hystrix)
bouncing-bet (Saponaria officinalis)
bouncingbet (Saponaria officinalis)
bouquet mudplantain (Heteranthera multiflora)
bower, virgin's (Clematis terniflora)
bower, virgin's (Clematis virginiana)
bracken (Pteridium aquilinum)
brackenfern, western (Pteridium aquilinum)
bracted plantain (Plantago aristata)
bractless blazingstar (Mentzelia nuda)
Bradbury beebalm (Monarda bradburiana)
Bradford pear (Pyrus calleryana)
brake, purple cliff (Pellaea atropurpurea)
branched foldwing (Dicliptera brachiata)
Brand's phacelia (Phacelia gilioides)
breadroot, Indian (Pediomelum esculentum)
breadroot, large Indian (Pediomelum esculentum)
breeches, Dutchman's (Dicentra cucullaria)
breeches, dutchman's (Dicentra cucullaria)
breeches, woollen (Hydrophyllum appendiculatum)
brickellbush, tasselflower (Brickellia grandiflora)
bridal wreath (Spiraea prunifolia)
bridalwreath spirea (Spiraea prunifolia)
bride's feathers (Aruncus dioicus)
brier, bashful (Mimosa quadrivalvis var. nuttallii)
brier, catclaw sensitive (Mimosa quadrivalvis var. nuttallii)
brier, sensitive (Mimosa quadrivalvis var. nuttallii)
bristle-leaved sedge (Carex eburnea)
bristlegrass, green (Setaria viridis)
bristlegrass, Japanese (Setaria faberi)
bristleleaf sedge (Carex eburnea)
bristly buttercup (Ranunculus hispidus)
bristly locust (Robinia hispida)
bristly sunflower (Helianthus hirsutus)
brittlestem hempnettle (Galeopsis tetrahit)
broad-leaved bluets (Houstonia purpurea)
broad-leaved dock (Rumex obtusifolius)
broad-leaved plantain (Plantago rugelii)
broadfruit bur-reed (Sparganium eurycarpum)
broadleaf arrowhead (Sagittaria latifolia)
broadleaf enchanter's nightshade (Circaea canadensis)
broadleaf goldenrod (Solidago flexicaulis)
broadleaf helleborine (Epipactis helleborine)
broadleaf phlox (Phlox amplifolia)
broadleaf spike grass (Chasmanthium latifolium)
broadleaf waterleaf (Hydrophyllum canadense)
brome, Canada (Bromus pubescens)
brome, hairy woodland (Bromus pubescens)
brook euonymus (Euonymus americanus)
brookweed (Samolus parviflorus)
brookweed, seaside (Samolus parviflorus)
broom corn (Sorghum bicolor)
broom snakeroot (Amphiachyris dracunculoides)
broomrape, oneflowered (Orobanche uniflora)
broomweed (Amphiachyris dracunculoides)
broomweed, prairie (Amphiachyris dracunculoides)
brown widelip orchid (Liparis liliifolia)
brown-eyed Susan (Rudbeckia triloba)
browneyed Susan (Rudbeckia triloba)
browntop, Nepalese (Microstegium vimineum)
buckbrush (Andrachne phyllanthoides)
buckeye, bottlebrush (Aesculus parviflora)
buckeye, Ohio (Aesculus glabra)
buckeye, red (Aesculus pavia)
buckhorn (Plantago aristata)
buckhorn (Plantago lanceolata)
Buckley's goldenrod (Solidago buckleyi)
buckthorn (Rhamnus lanceolata)
buckthorn, lanceleaf (Rhamnus lanceolata)
buckwheat, climbing (Fallopia convolvulus)
buckwheat, climbing false (Fallopia scandens)
buckwheat, crested (Fallopia scandens)
buckwheat, false (Fallopia scandens)
buckwheat, wild (Fallopia convolvulus)
buffalo bur (Solanum rostratum)
buffalo clover (Trifolium reflexum)
buffalo currant (Ribes odoratum)
buffalo gourd (Cucurbita foetidissima)
buffalo grass (Buchloe dactyloides)
buffalo weed (Ambrosia trifida)
buffalobur nightshade (Solanum rostratum)
buffalograss (Buchloe dactyloides)
bugbane, Carolina (Trautvetteria caroliniensis)
bugbane, false (Trautvetteria caroliniensis)
bugle weed (Lycopus virginicus)
bugle, carpet (Ajuga reptans)
bugle, common (Ajuga reptans)
bugleweed, American (Lycopus americanus)
bugleweed, Virginia (Lycopus virginicus)
bugloss, common viper's (Echium vulgare)
bulbous bittercress (Cardamine bulbosa)
bulbous bluegrass (Poa bulbosa)
bulbous buttercup (Ranunculus bulbosus)
bull nettle (Solanum carolinense)
bull thistle (Cirsium vulgare)
bullbrier (Smilax bona-nox)
bulrush, common (Scirpus atrovirens)
bulrush, green (Scirpus atrovirens)
bulrush, rufous (Scirpus pendulus)
bunchflower (Melanthium virginicum)
bunchflower, Virginia (Melanthium virginicum)
bunchflower, Wood's (Veratrum woodii)
bundleflower, Illinois (Desmanthus illinoensis)
bur buttercup (Ceratocephalus testiculatus)
bur cucumber (Sicyos angulatus)
bur sedge (Carex grayi)
bur, buffalo (Solanum rostratum)
bur-reed (Sparganium americanum)
bur-reed, American (Sparganium americanum)
bur-reed, broadfruit (Sparganium eurycarpum)
bur-reed, giant (Sparganium eurycarpum)
burclover (Medicago polymorpha)
burdock, common (Arctium minus)
burdock, lesser (Arctium minus)
burhead, creeping (Echinodorus cordifolius)
burhead, dwarf (Helanthium tenellum)
burhead, tall (Echinodorus berteroi var. berteroi)
burhead, upright (Echinodorus berteroi var. berteroi)
burningbush (Euonymus atropurpureus)
burnweed, American (Erechtites hieraciifolius)
bursting-heart (Euonymus americanus)
bush honeysuckle (Lonicera maackii)
Bush's purple coneflower (Echinacea paradoxa)
Bush's skullcap (Scutellaria bushii)
bush, common butterfly (Buddleja davidii)
bush, false indigo (Amorpha fruticosa)
bush, Juda's (Iresine rhizomatosa)
bush, polecat (Rhus aromatica)
bush, spice (Lindera benzoin)
bush, strawberry (Euonymus americanus)
bushy cinquefoil (Potentilla supina)
bushy goldentop (Euthamia leptocephala)
bushy knotweed (Polygonum ramosissimum ssp. ramosissimum)
bushy seedbox (Ludwigia alternifolia)
bushy vetchling (Lathyrus venosus)
bushy wallflower (Erysimum repandum)
butcher, bloody (Trillium recurvatum)
butter and eggs (Linaria vulgaris)
butter-print (Abutilon theophrasti)
buttercup, bristly (Ranunculus hispidus)
buttercup, bulbous (Ranunculus bulbosus)
buttercup, bur (Ceratocephalus testiculatus)
buttercup, cursed (Ranunculus sceleratus)
buttercup, early (Ranunculus fascicularis)
buttercup, early wood (Ranunculus abortivus)
buttercup, hairy (Ranunculus sardous)
buttercup, Harvey's (Ranunculus harveyi)
buttercup, hispid (Ranunculus hispidus)
buttercup, hornseed (Ceratocephalus testiculatus)
buttercup, littleleaf (Ranunculus abortivus)
buttercup, Mississippi (Ranunculus laxicaulis)
buttercup, prairie (Ranunculus fascicularis)
buttercup, rock (Ranunculus micranthus)
buttercup, smallflower (Ranunculus parviflorus)
buttercup, swamp (Ranunculus hispidus)
butterfly milkweed (Asclepias tuberosa)
butterfly pea (Clitoria mariana)
butterfly violet (Viola sororia)
butterfly weed (Asclepias tuberosa)
butterflybush, orange eye (Buddleja davidii)
butterweed (Packera glabella)
button eryngo (Eryngium yuccifolium)
button snakeroot (Liatris pycnostachya)
button snakeroot (Liatris spicata)
button snakeroot (Eryngium yuccifolium)
button, bachelor's (Centaurea cyanus)
buttonbush (Cephalanthus occidentalis)
buttonbush, common (Cephalanthus occidentalis)
buttons, golden (Tanacetum vulgare)
buttonweed (Spermacoce glabra)
buttonweed, large (Diodia virginiana)
buttonweed, rough (Diodia teres)
buttonweed, smooth false (Spermacoce glabra)
buttonweed, Virginia (Diodia virginiana)
cabbage, John's (Hydrophyllum virginianum)
calamint, Arkansas (Clinopodium arkansanum)
calamint, limestone (Clinopodium arkansanum)
calamint, low (Clinopodium arkansanum)
Caley pea (Lathyrus hirsutus)
California bur clover (Medicago polymorpha)
Callery pear (Pyrus calleryana)
calliopsis (Coreopsis tinctoria)
caltrop (Tribulus terrestris)
camas, Atlantic (Camassia scilloides)
camas, white (Zigadenus elegans)
camphor pluchea (Pluchea camphorata)
camphor weed (Pluchea camphorata)
camphor weed (Heterotheca camporum var. camporum)
camphor weed (Heterotheca camporum var. glandulissima)
camphor weed (Heterotheca subaxillaris)
camphorweed (Heterotheca subaxillaris)
campion, bladder (Silene vulgaris ssp. vulgaris)
campion, evening (Silene latifolia)
campion, glaucous (Silene csereii)
campion, rose (Lychnis coronaria)
campion, starry (Silene stellata)
campion, white (Silene latifolia)
Canada brome (Bromus pubescens)
Canada cinquefoil (Potentilla canadensis)
Canada fleabane (Conyza canadensis)
Canada germander (Teucrium canadense)
Canada goldenrod (Solidago altissima)
Canada lettuce (Lactuca canadensis)
Canada snakeroot (Sanicula canadensis)
Canada thistle (Cirsium arvense)
Canada tick clover (Desmodium canadense)
Canada toadflax (Nuttallanthus canadensis)
Canadian anemone (Anemone canadensis)
Canadian blacksnakeroot (Sanicula canadensis)
Canadian clearweed (Pilea pumila)
Canadian honewort (Cryptotaenia canadensis)
Canadian horseweed (Conyza canadensis)
Canadian licorice-root (Ligusticum canadense)
Canadian lousewort (Pedicularis canadensis)
Canadian milkvetch (Astragalus canadensis)
Canadian wildginger (Asarum canadense)
Canadian woodnettle (Laportea canadensis)
cancer root (Kickxia elatine)
cancer tree (Ailanthus altissimus)
cancer-root, one-flowered (Orobanche uniflora)
cancer-root, small (Orobanche uniflora)
cancerweed (Salvia lyrata)
cancerwort, sharpleaf (Kickxia elatine)
canker root (Kickxia elatine)
cap, bishop's (Mitella diphylla)
cardinal flower (Lobelia cardinalis)
cardinalflower (Lobelia cardinalis)
careless weed (Amaranthus spinosus)
Carolina allspice (Calycanthus floridus)
Carolina bugbane (Trautvetteria caroliniensis)
Carolina coralbead (Cocculus carolinus)
Carolina crane's bill (Geranium carolinianum)
Carolina desert-chicory (Pyrrhopappus carolinianus)
Carolina draba (Draba reptans)
Carolina elephant's foot (Elephantopus carolinianus)
Carolina elephantsfoot (Elephantopus carolinianus)
Carolina fanwort (Cabomba caroliniana)
Carolina geranium (Geranium carolinianum)
Carolina horsenettle (Solanum carolinense)
Carolina larkspur (Delphinium carolinianum)
Carolina larkspur (Delphinium carolinianum ssp. virescens)
Carolina leaf-flower (Phyllanthus caroliniensis)
Carolina moonseed (Cocculus carolinus)
Carolina ponysfoot (Dichondra carolinensis)
Carolina puccoon (Lithospermum caroliniense)
Carolina rose (Rosa carolina)
Carolina snailseed (Cocculus carolinus)
Carolina thistle (Cirsium carolinianum)
Carolina vetch (Vicia caroliniana)
Carolina water shield (Cabomba caroliniana)
carpenter's square (Scrophularia marilandica)
carpet bugle (Ajuga reptans)
carpetweed (Mollugo verticillata)
carpetweed, green (Mollugo verticillata)
carrion flower (Smilax lasioneura)
carrion flower (Smilax pulverulenta)
carrionflower, Blue Ridge (Smilax lasioneura)
carrionflower, downy (Smilax pulverulenta)
carrot, wild (Daucus carota)
castor bean (Ricinus communis)
castor oil plant (Ricinus communis)
castorbean (Ricinus communis)
catalpa, common (Catalpa bignonioides)
catalpa, hardy (Catalpa speciosa)
catalpa, northern (Catalpa speciosa)
catalpa, southern (Catalpa bignonioides)
catawba tree (Catalpa speciosa)
catbrier (Smilax bona-nox)
catchfly, Balkan (Silene csereii)
catchfly, bladder (Silene vulgaris ssp. vulgaris)
catchfly, royal (Silene regia)
catchfly, sleepy (Silene antirrhina)
catchfly, smooth (Silene csereii)
catchfly, sticky (Silene caroliniana)
catclaw sensitive brier (Mimosa quadrivalvis var. nuttallii)
catfoot (Pseudognaphalium obtusifolium)
catgut (Tephrosia virginiana)
catmint (Nepeta cataria)
catnip (Nepeta cataria)
cedar, running ground (Lycopodium digitatum)
celandine poppy (Stylophorum diphyllum)
cellophane plant (Echinodorus berteroi var. berteroi)
chairmaker's rush (Schoenoplectus pungens)
chamomile, corn (Anthemis arvensis)
chamomile, false (Matricaria chamomilla)
chamomile, German (Matricaria chamomilla)
chamomile, golden (Cota tinctoria ssp. subtinctoria)
chamomile, wild (Matricaria chamomilla)
chamomile, yellow (Cota tinctoria ssp. subtinctoria)
charlock, jointed (Raphanus raphanistrum)
cheeses (Malva neglecta)
Cherokee sedge (Carex cherokeensis)
cherry, annual ground (Physalis pubescens)
cherry, black (Prunus serotina)
cherry, clammy ground (Physalis heterophylla)
cherry, common ground (Physalis longifolia)
cherry, cutleaf ground (Physalis angulata)
cherry, downy ground (Physalis pubescens)
cherry, prairie ground (Physalis pumila)
cherry, rum (Prunus serotina)
cherry, Virginia ground (Physalis virginiana)
cherry, wild (Prunus serotina)
chervil, hairyfruit (Chaerophyllum tainturieri)
chervil, spreading (Chaerophyllum procumbens)
chervil, wild (Chaerophyllum procumbens)
chervil, wild (Chaerophyllum tainturieri)
chervil, wild (Cryptotaenia canadensis)
chestnut, horse (Aesculus hippocastanum)
chicken corn (Sorghum bicolor)
chicken thief (Mentzelia oligosperma)
chickenthief (Mentzelia oligosperma)
chickweed, clammy (Cerastium glomeratum)
chickweed, common (Stellaria media)
chickweed, doubtful (Cerastium dubium)
chickweed, field (Cerastium velutinum)
chickweed, forked (Paronychia fastigiata)
chickweed, gray (Cerastium brachypetalum)
chickweed, gray mouse-ear (Cerastium brachypetalum)
chickweed, Indian (Mollugo verticillata)
chickweed, jagged (Holosteum umbellatum)
chickweed, nodding (Cerastium nutans)
chickweed, prairie (Cerastium velutinum)
chickweed, star (Stellaria pubera)
chickweed, sticky (Cerastium glomeratum)
chickweed, three-styled (Cerastium dubium)
chicory (Cichorium intybus)
chicory, common (Cichorium intybus)
chigger flower (Asclepias tuberosa)
Chinese chives (Allium tuberosum)
Chinese foxtail (Setaria faberi)
Chinese lespedeza (Lespedeza cuneata)
chinquapin, water (Nelumbo lutea)
chive, garlic (Allium tuberosum)
chives, Chinese (Allium tuberosum)
chloris, showy (Chloris virgata)
chokeberry, black (Aronia melanocarpa)
Christmas fern (Polystichum acrostichoides)
cicely, smooth sweet (Osmorhiza longistylis)
cicely, sweet (Osmorhiza claytonii)
cicely, woolly sweet (Osmorhiza claytonii)
cigar tree (Catalpa speciosa)
ciliate blue star (Amsonia ciliata)
cinnamon fern (Osmunda cinnamomea)
cinnamon willow herb (Epilobium coloratum)
cinquefoil, bushy (Potentilla supina)
cinquefoil, Canada (Potentilla canadensis)
cinquefoil, common (Potentilla simplex)
cinquefoil, dwarf (Potentilla canadensis)
cinquefoil, Norwegian (Potentilla norvegica)
cinquefoil, old-field (Potentilla simplex)
cinquefoil, paradox (Potentilla supina)
cinquefoil, rough (Potentilla norvegica)
cinquefoil, rough-fruited (Potentilla recta)
cinquefoil, shrubby (Potentilla fruticosa)
cinquefoil, sulphur (Potentilla recta)
citronella (Collinsonia canadensis)
clammy chickweed (Cerastium glomeratum)
clammy cuphea (Cuphea viscosissima)
clammy goosefoot (Chenopodium pumilio)
clammy ground cherry (Physalis heterophylla)
clammy groundcherry (Physalis heterophylla)
clammy hedge hyssop (Gratiola neglecta)
clammy hedgehyssop (Gratiola neglecta)
clammy-weed (Polanisia dodecandra)
clammyweed, redwhisker (Polanisia dodecandra)
clasping coneflower (Rudbeckia amplexicaulis)
clasping milkweed (Asclepias amplexicaulis)
clasping Venus' looking glass (Triodanis perfoliata)
clasping Venus' looking-glass (Triodanis perfoliata)
claspleaf pennycress (Microthlaspi perfoliatum)
Clayton's sweetroot (Osmorhiza claytonii)
clearweed (Pilea fontana)
clearweed (Pilea pumila)
clearweed, Canadian (Pilea pumila)
clearweed, lesser (Pilea fontana)
cleavers (Galium aparine)
cleft phlox (Phlox bifida)
cleft violet (Viola palmata)
Cleland's evening primrose (Oenothera clelandii)
cliffbrake, purple (Pellaea atropurpurea)
climbing buckwheat (Fallopia convolvulus)
climbing dayflower (Commelina diffusa)
climbing false buckwheat (Fallopia scandens)
climbing hempvine (Mikania scandens)
climbing hempweed (Mikania scandens)
climbing milkweed (Matelea decipiens)
climbing milkweed (Cynanchum laeve)
climbing milkweed (Matelea baldwyniana)
climbing nightshade (Solanum dulcamara)
climbing rose (Rosa setigera)
closed bottle gentian (Gentiana andrewsii)
closed gentian (Gentiana andrewsii)
clover, Alsike (Trifolium hybridum)
clover, alsike (Trifolium hybridum)
clover, Bishop (Trifolium campestre)
clover, buffalo (Trifolium reflexum)
clover, California bur (Medicago polymorpha)
clover, Canada tick (Desmodium canadense)
clover, crimson (Trifolium incarnatum)
clover, Dutch (Trifolium repens)
clover, few-flowered tick (Hylodesmum pauciflorum)
clover, field (Trifolium campestre)
clover, foxtail prairie (Dalea leporina)
clover, Gattinger's prairie (Dalea gattingeri)
clover, giant tick (Desmodium canadense)
clover, hairy bush (Lespedeza hirta)
clover, Japanese (Kummerowia striata)
clover, Korean (Kummerowia stipulacea)
clover, Ladino (Trifolium repens)
clover, large hop (Trifolium campestre)
clover, large-flowered tick (Hylodesmum glutinosum)
clover, longleaf tick (Desmodium cuspidatum)
clover, naked-stemmed tick (Hylodesmum nudiflorum)
clover, Persian (Trifolium resupinatum)
clover, pin (Erodium cicutarium)
clover, purple prairie (Dalea purpurea var. purpurea)
clover, rabbit's foot (Trifolium arvense)
clover, rabbitfoot (Trifolium arvense)
clover, red (Trifolium pratense)
clover, reversed (Trifolium resupinatum)
clover, round-headed bush (Lespedeza capitata)
clover, slender bush (Lespedeza virginica)
clover, smooth bur (Medicago polymorpha)
clover, smooth tick (Desmodium laevigatum)
clover, sticky tick (Hylodesmum glutinosum)
clover, stinking (Cleome serrulata)
clover, trailing bush (Lespedeza procumbens)
clover, white (Trifolium repens)
clover, white prairie (Dalea candida)
clover, white sweet (Melilotus albus)
clover, yellow sweet (Melilotus officinalis)
club, Hercules' (Aralia spinosa)
clubmoss, fan (Lycopodium digitatum)
cluster tick trefoil (Hylodesmum glutinosum)
cluster-sanicle (Sanicula odorata)
clustered blacksnakeroot (Sanicula odorata)
clustervine, hairy (Jacquemontia tamnifolia)
cobaea beard-tongue (Penstemon cobaea)
cobaea beardtongue (Penstemon cobaea)
cobaea penstemon (Penstemon cobaea)
cockle, corn (Agrostemma githago)
cockle, white (Silene latifolia)
coffee senna (Senna occidentalis)
coffee weed (Senna obtusifolia)
coffee weed (Senna occidentalis)
coffee, wild (Triosteum perfoliatum)
coffee-weed (Sesbania herbacea)
cohosh, black (Actaea racemosa)
cohosh, blue (Caulophyllum thalictroides)
coleus, summer (Perilla frutescens)
collinsia, violet (Collinsia violacea)
collomia (Collomia linearis)
Colorado greenthread (Thelesperma megapotamicum)
columbine (Aquilegia canadensis)
columbine, red (Aquilegia canadensis)
columbo, American (Frasera caroliniensis)
combleaf yellow false foxglove (Aureolaria pectinata)
comfrey, wild (Cynoglossum virginianum)
common alder (Alnus serrulata)
common arrowhead (Sagittaria latifolia)
common balloon vine (Cardiospermum halicacabum)
common barley (Hordeum vulgare)
common bladderwort (Utricularia vulgaris)
common blue violet (Viola papilionacea)
common blue violet (Viola sororia)
common blue wood aster (Symphyotrichum cordifolium)
common boneset (Eupatorium perfoliatum)
common bugle (Ajuga reptans)
common bulrush (Scirpus atrovirens)
common burdock (Arctium minus)
common butterfly bush (Buddleja davidii)
common buttonbush (Cephalanthus occidentalis)
common catalpa (Catalpa bignonioides)
common chickweed (Stellaria media)
common chicory (Cichorium intybus)
common cinquefoil (Potentilla simplex)
common corncockle (Agrostemma githago)
common cowparsnip (Heracleum sphondylium)
common dayflower (Commelina communis)
common dittany (Cunila origanoides)
common dogmustard (Erucastrum gallicum)
common dwarf dandelion (Krigia cespitosa)
common elderberry (Sambucus canadensis)
common evening primrose (Oenothera biennis)
common flat-topped goldenrod (Euthamia graminifolia)
common flax (Linum usitatissimum)
common flowering quince (Chaenomeles speciosa)
common fog fruit (Lippia nodiflora)
common frog fruit (Lippia nodiflora)
common gerardia (Agalinis tenuifolia)
common golden Alexanders (Zizia aurea)
common goldstar (Hypoxis hirsuta)
common grape hyacinth (Muscari botryoides)
common ground cherry (Physalis longifolia)
common groundsel (Senecio vulgaris)
common hemp nettle (Galeopsis tetrahit)
common hop (Humulus lupulus)
common hop tree (Ptelea trifoliata)
common hops (Humulus lupulus)
common hoptree (Ptelea trifoliata)
common horse gentian (Triosteum perfoliatum)
common hound's tongue (Cynoglossum officinale)
common jimsonweed (Datura stramonium)
common ladies' tresses (Spiranthes cernua)
common lespedeza (Kummerowia striata)
common lilac (Syringa vulgaris)
common lousewort (Pedicularis canadensis)
common maidenhair (Adiantum capillus-veneris)
common mallow (Malva neglecta)
common meadow parsnip (Zizia aurea)
common milfoil (Achillea millefolium)
common milkweed (Asclepias syriaca)
common moonseed (Menispermum canadense)
common morning glory (Ipomoea purpurea)
common motherwort (Leonurus cardiaca)
common mullein (Verbascum thapsus)
common ninebark (Physocarpus opulifolius)
common periwinkle (Vinca minor)
common persimmon (Diospyros virginiana)
common polypody (Polypodium virginianum)
common purslane (Portulaca oleracea)
common ragweed (Ambrosia artemisiifolia)
common rush (Juncus effusus)
common rushfoil (Croton willdenowii)
common scouring rush (Equisetum hyemale)
common selfheal (Prunella vulgaris)
common serviceberry (Amelanchier arborea)
common sheep sorrel (Rumex acetosella)
common shooting star (Primula meadia)
common smartweed (Persicaria pensylvanica)
common sneezeweed (Helenium autumnale)
common St. John's-wort (Hypericum perforatum)
common St. Johnswort (Hypericum perforatum)
common sunflower (Helianthus annuus)
common tansy (Tanacetum vulgare)
common teasel (Dipsacus fullonum)
common three-square (Schoenoplectus pungens)
common threeseed mercury (Acalypha rhomboidea)
common threesquare (Schoenoplectus pungens)
common violet (Viola sororia)
common viper's bugloss (Echium vulgare)
common water hemlock (Cicuta maculata)
common wheat (Triticum aestivum)
common winter cress (Barbarea vulgaris)
common wood sedge (Carex blanda)
common yarrow (Achillea millefolium)
common yellow oxalis (Oxalis stricta)
compass plant (Silphium laciniatum)
compassplant (Silphium laciniatum)
coneflower, Bush's purple (Echinacea paradoxa)
coneflower, clasping (Rudbeckia amplexicaulis)
coneflower, cutleaf (Rudbeckia laciniata)
coneflower, drooping (Ratibida pinnata)
coneflower, eastern purple (Echinacea purpurea)
coneflower, glade (Echinacea simulata)
coneflower, grayhead prairie (Ratibida pinnata)
coneflower, longhead prairie (Ratibida columnifera)
coneflower, Missouri (Rudbeckia missouriensis)
coneflower, Missouri orange (Rudbeckia missouriensis)
coneflower, orange (Rudbeckia fulgida)
coneflower, pale purple (Echinacea pallida)
coneflower, pale purple (Echinacea simulata)
coneflower, pinnate prairie (Ratibida pinnata)
coneflower, purple (Echinacea purpurea)
coneflower, sweet (Rudbeckia subtomentosa)
coneflower, upright prairie (Ratibida columnifera)
coneflower, wavyleaf purple (Echinacea simulata)
coneflower, yellow (Echinacea paradoxa)
conmigo, vente (Croton glandulosus)
coolwort, Sullivant's (Sullivantia sullivantii)
coontail (Myriophyllum heterophyllum)
copper iris (Iris fulva)
copperleaf, rhombic (Acalypha rhomboidea)
copperleaf, roughpod (Acalypha ostryifolia)
copperleaf, Virginia (Acalypha virginica)
coral honeysuckle (Lonicera sempervirens)
coral root (Corallorhiza wisteriana)
coralbead, Carolina (Cocculus carolinus)
coralroot, spring (Corallorhiza wisteriana)
coreopsis, bigflower (Coreopsis grandiflora)
coreopsis, finger (Coreopsis palmata)
coreopsis, plains (Coreopsis tinctoria)
coreopsis, tall (Coreopsis tripteris)
coreopsis, tickseed (Coreopsis lanceolata)
coriander (Coriandrum sativum)
corn chamomile (Anthemis arvensis)
corn cockle (Agrostemma githago)
corn gromwell (Buglossoides arvensis)
corn mint (Mentha canadensis)
corn poppy (Papaver rhoeas)
corn salad (Valerianella locusta)
corn salad (Valerianella radiata)
corn speedwell (Veronica arvensis)
corn spurrey (Spergula arvensis)
corn spurry (Spergula arvensis)
corn, broom (Sorghum bicolor)
corn, chicken (Sorghum bicolor)
corn, Kafir (Sorghum bicolor)
corn, squirrel (Dicentra canadensis)
corncockle, common (Agrostemma githago)
cornflower (Centaurea cyanus)
cornflower, garden (Centaurea cyanus)
cornsalad, beaked (Valerianella radiata)
cornsalad, Lewiston (Valerianella locusta)
corydalis, golden (Corydalis aurea ssp. occidentalis)
corydalis, mealy (Corydalis crystallina)
corydalis, pale (Corydalis flavula)
corydalis, small-flowered (Corydalis micrantha)
cosmos, garden (Cosmos bipinnatus)
cosmos, sulphur (Cosmos sulphureus)
cottonweed, field (Froelichia floridana)
cottonweed, slender (Froelichia gracilis)
cow cress (Lepidium campestre)
cow parsnip (Heracleum sphondylium)
cowbane (Oxypolis rigidior)
cowbane, spotted (Cicuta maculata)
cowbane, stiff (Oxypolis rigidior)
cowlily (Nuphar advena)
cowparsnip, common (Heracleum sphondylium)
cowslip (Caltha palustris)
cowslip, American (Primula meadia)
cowslip, Virginia (Mertensia virginica)
crab, wild (Malus angustifolia)
crabweed, hairy (Fatoua villosa)
cranberrybush, European (Viburnum opulus)
cranefly orchid (Tipularia discolor)
cranefly, crippled (Tipularia discolor)
cream avens (Geum virginianum)
cream violet (Viola striata)
cream white indigo (Baptisia bracteata)
creeper, trumpet (Campsis radicans)
creeping bellflower (Campanula rapunculoides)
creeping burhead (Echinodorus cordifolius)
creeping cucumber (Melothria pendula)
creeping eryngo (Eryngium prostratum)
creeping jenny (Lysimachia nummularia)
creeping primrose willow (Ludwigia peploides)
creeping vervain (Verbena bracteata)
creeping yellow cress (Rorippa sylvestris)
creeping yellowcress (Rorippa sylvestris)
cress, bitter (Cardamine pensylvanica)
cress, bog yellow (Rorippa palustris var. fernaldiana)
cress, common winter (Barbarea vulgaris)
cress, cow (Lepidium campestre)
cress, creeping yellow (Rorippa sylvestris)
cress, field (Lepidium campestre)
cress, field penny (Thlaspi arvense)
cress, heart-podded hoary (Lepidium draba)
cress, hoary bitter (Cardamine hirsuta)
cress, lake (Rorippa aquatica)
cress, lens-podded hoary (Lepidium chalepense)
cress, marsh (Rorippa sessiliflora)
cress, marsh yellow (Rorippa palustris var. fernaldiana)
cress, Missouri rock (Boechera missouriensis)
cress, mouse-ear (Arabidopsis thaliana)
cress, mouseear (Arabidopsis thaliana)
cress, northern bitter (Cardamine douglassii)
cress, penny (Microthlaspi perfoliatum)
cress, perfoliate penny (Microthlaspi perfoliatum)
cress, purple (Cardamine douglassii)
cress, rock (Boechera dentata)
cress, rock (Boechera missouriensis)
cress, sand (Arabidopsis lyrata)
cress, sessile-flowered (Rorippa sessiliflora)
cress, small-flowered bitter (Cardamine parviflora)
cress, smooth rock (Boechera laevigata)
cress, spreading yellow (Rorippa sinuata)
cress, swine (Lepidium didymum)
cress, thale (Arabidopsis thaliana)
cress, Virginia rock (Planodes virginicum)
cress, wart (Lepidium didymum)
cress, yellow (Rorippa sessiliflora)
cress, yellow water (Rorippa palustris var. fernaldiana)
crested anoda (Anoda cristata)
crested buckwheat (Fallopia scandens)
crested iris (Iris cristata)
crimson clover (Trifolium incarnatum)
crippled cranefly (Tipularia discolor)
cross vine (Bignonia capreolata)
cross, St. Andrew's (Hypericum hypericoides)
cross, widow's (Sedum pulchellum)
crossflower (Chorispora tenella)
crossvine (Bignonia capreolata)
croton, Michaux's (Croton willdenowii)
croton, one-seeded (Croton monanthogynus)
croton, sand (Croton glandulosus)
croton, tropic (Croton glandulosus)
croton, woolly (Croton capitatus)
crow poison (Nothoscordum bivalve)
crowfoot, cursed (Ranunculus sceleratus)
crowfoot, hooked (Ranunculus recurvatus)
crowfoot, small-flowered (Ranunculus abortivus)
crowfoot, small-flowered (Ranunculus parviflorus)
crowfoot, stickseed (Ranunculus parviflorus)
crown vetch (Securigera varia)
crownbeard, white (Verbesina virginica)
crownbeard, yellow (Verbesina helianthoides)
crownvetch (Securigera varia)
crowpoison (Nothoscordum bivalve)
cucumber, bur (Sicyos angulatus)
cucumber, creeping (Melothria pendula)
cucumber, Guadeloupe (Melothria pendula)
cucumber, oneseed bur (Sicyos angulatus)
cudweed, early (Gamochaeta purpurea)
cudweed, fragrant (Pseudognaphalium obtusifolium)
cudweed, purple (Gamochaeta purpurea)
cultivated garlic (Allium sativum)
cultivated radish (Raphanus sativus)
Culver's root (Veronicastrum virginicum)
culver's root (Veronicastrum virginicum)
Cuman ragweed (Ambrosia psilostachya)
cup plant (Silphium perfoliatum)
cup rosinweed (Silphium perfoliatum)
cup, downy painted (Castilleja sessiliflora)
cup, finger wine (Callirhoe digitata)
cup, painted (Castilleja coccinea)
cup, pale-flowered leaf (Polymnia canadensis)
cup, yellow-flowered leaf (Smallanthus uvedalia)
cuphea, clammy (Cuphea viscosissima)
cupseed (Calycocarpum lyonii)
curls, blue (Trichostema dichotomum)
curls, blue (Trichostema setaceum)
curly dock (Rumex crispus)
curly oat grass (Danthonia spicata)
curlycup gumweed (Grindelia squarrosa)
curlytop gumweed (Grindelia squarrosa)
curlytop knotweed (Persicaria lapathifolia)
currant, buffalo (Ribes odoratum)
currant, golden (Ribes odoratum)
currant, Missouri (Ribes odoratum)
cursed buttercup (Ranunculus sceleratus)
cursed crowfoot (Ranunculus sceleratus)
curvepod fumewort (Corydalis aurea ssp. occidentalis)
cut leaved toothwort (Cardamine concatenata)
cut-leaf grape fern (Sceptridium dissectum)
cut-leaved evening primrose (Oenothera laciniata)
cut-leaved teasel (Dipsacus laciniatus)
cutleaf coneflower (Rudbeckia laciniata)
cutleaf crane's bill (Geranium dissectum)
cutleaf evening primrose (Oenothera laciniata)
cutleaf geranium (Geranium dissectum)
cutleaf grapefern (Sceptridium dissectum)
cutleaf ground cherry (Physalis angulata)
cutleaf groundcherry (Physalis angulata)
cutleaf teasel (Dipsacus laciniatus)
cutleaf toothwort (Cardamine concatenata)
Cynthia, two-flowered (Krigia biflora)
cypress spurge (Euphorbia cyparissias)
cypress vine (Ipomoea quamoclit)
cypressvine (Ipomoea quamoclit)
daffodil (Narcissus pseudonarcissus)
daisy fleabane (Erigeron annuus)
daisy fleabane (Erigeron strigosus)
daisy, false (Eclipta prostrata)
daisy, ox-eye (Leucanthemum vulgare)
daisy, oxeye (Leucanthemum vulgare)
daisy, purple (Symphyotrichum patens)
daisy, tiny lazy (Chaetopappa asteroides)
daisy, white (Leucanthemum vulgare)
daisy, white doll's (Boltonia asteroides)
dalea, foxtail (Dalea leporina)
dalea, hare's foot (Dalea leporina)
dame's rocket (Hesperis matronalis)
dames rocket (Hesperis matronalis)
dandelion, common dwarf (Krigia cespitosa)
dandelion, false (Pyrrhopappus carolinianus)
dandelion, orange dwarf (Krigia biflora)
dandelion, potato (Krigia dandelion)
dandelion, prairie (Nothocalais cuspidata)
dandelion, prairie false (Nothocalais cuspidata)
dandelion, red-seeded (Taraxacum erythrospermum)
dandelion, rock (Taraxacum erythrospermum)
dandelion, Virginia dwarf (Krigia virginica)
dawnflower, Pickering's (Stylisma pickeringii)
dayflower (Commelina diffusa)
dayflower (Commelina erecta)
dayflower (Commelina virginica)
dayflower, Asiatic (Commelina communis)
dayflower, climbing (Commelina diffusa)
dayflower, common (Commelina communis)
dayflower, Virginia (Commelina virginica)
dayflower, whitemouth (Commelina erecta)
daylily, orange (Hemerocallis fulva)
dead nettle (Lamium purpureum)
deadnettle, henbit (Lamium amplexicaule)
deadnettle, purple (Lamium purpureum)
Deam's threeseed mercury (Acalypha deamii)
deathcamas, mountain (Zigadenus elegans)
deerberry (Vaccinium stamineum)
delta arrowhead (Sagittaria platyphylla)
dense blazing star (Liatris spicata)
denseflower knotweed (Persicaria glabra)
densetuft hairsedge (Bulbostylis capillaris)
Deptford pink (Dianthus armeria)
desert biscuitroot (Lomatium foeniculaceum)
desert-chicory, Carolina (Pyrrhopappus carolinianus)
devil's beggartick (Bidens frondosa)
devil's bite (Liatris scariosa)
devil's darning needles (Clematis virginiana)
devil's fig (Argemone mexicana)
devil's shoelaces (Campsis radicans)
devil's walking stick (Aralia spinosa)
devil's walkingstick (Aralia spinosa)
devil, blue (Echium vulgare)
devil, blue (Symphyotrichum oolentangiense)
dewberry, northern (Rubus flagellaris)
dewdrop, purple (Lobelia puberula)
diamond flowers (Houstonia nigricans)
diamondflowers (Houstonia nigricans)
dicliptera (Dicliptera brachiata)
dill (Anethum graveolens)
disc mayweed (Matricaria discoidea)
disk waterhyssop (Bacopa rotundifolia)
ditch stonecrop (Penthorum sedoides)
dittany (Cunila origanoides)
dittany, common (Cunila origanoides)
dock, bitter (Rumex obtusifolius)
dock, blunt-leaved (Rumex obtusifolius)
dock, broad-leaved (Rumex obtusifolius)
dock, curly (Rumex crispus)
dock, fiddle (Rumex pulcher)
dock, narrow-leaved (Rumex stenophyllus)
dock, narrowleaf (Rumex stenophyllus)
dock, pale (Rumex altissimus)
dock, peach-leaved (Rumex altissimus)
dock, prairie (Silphium terebinthinaceum)
dock, red-veined (Rumex obtusifolius)
dock, sour (Rumex crispus)
dock, sour (Rumex acetosella)
dock, sour (Rumex hastatulus)
dock, tall (Rumex altissimus)
dock, yellow (Rumex crispus)
dodder (Cuscuta)
dog mustard (Erucastrum gallicum)
dog-fennel, yellow (Helenium amarum)
dogbane, pink-flowered (Apocynum androsaemifolium)
dogbane, prairie (Apocynum cannabinum)
dogbane, spreading (Apocynum androsaemifolium)
dogberry (Ribes cynosbati)
dogmustard, common (Erucastrum gallicum)
dogtooth violet (Erythronium americanum)
dogwood, flowering (Cornus florida)
dogwood, gray (Cornus foemina)
dogwood, pale (Cornus amomum)
dogwood, pond (Cephalanthus occidentalis)
dogwood, rough-leaved (Cornus drummondii)
dogwood, roughleaf (Cornus drummondii)
dogwood, silky (Cornus amomum)
dogwood, stiff (Cornus foemina)
dogwood, swamp (Cornus amomum)
doll's eyes (Actaea pachypoda)
dollarleaf (Desmodium rotundifolium)
dotted beebalm (Monarda punctata)
dotted blazing star (Liatris punctata)
doubtful chickweed (Cerastium dubium)
doubtful knight's-spur (Delphinium ajacis)
dovefoot geranium (Geranium molle)
dovesfoot crane's bill (Geranium molle)
downy agrimony (Agrimonia pubescens)
downy carrionflower (Smilax pulverulenta)
downy gentian (Gentiana puberulenta)
downy goldenrod (Solidago petiolaris)
downy ground cherry (Physalis pubescens)
downy lobelia (Lobelia puberula)
downy milk pea (Galactia regularis)
downy pagoda-plant (Blephilia ciliata)
downy painted cup (Castilleja sessiliflora)
downy paintedcup (Castilleja sessiliflora)
downy phlox (Phlox pilosa)
downy ragged goldenrod (Solidago petiolaris)
downy rattlesnake plantain (Goodyera pubescens)
downy serviceberry (Amelanchier arborea)
downy shadbush (Amelanchier arborea)
downy skullcap (Scutellaria incana)
downy wild rye (Elymus villosus)
downy yellow violet (Viola pubescens)
draba, Carolina (Draba reptans)
draba, shortpod (Draba brachycarpa)
draba, spring (Draba verna)
draba, wedgeleaf (Draba cuneifolia)
dragonhead, false (Physostegia virginiana)
drooping coneflower (Ratibida pinnata)
drooping star of Bethlehem (Ornithogalum nutans)
drooping trillium (Trillium flexipes)
drops, false beech (Monotropa hypopitys)
drug fumitory (Fumaria officinalis)
Drummond aster (Symphyotrichum drummondii)
Drummond's aster (Symphyotrichum drummondii)
duck potato (Sagittaria latifolia)
durra (Sorghum bicolor)
Dutch clover (Trifolium repens)
Dutch flax (Camelina microcarpa)
Dutchman's breeches (Dicentra cucullaria)
dutchman's breeches (Dicentra cucullaria)
Dutchman's pipe (Isotrema tomentosa)
dwarf burhead (Helanthium tenellum)
dwarf cinquefoil (Potentilla canadensis)
dwarf crested iris (Iris cristata)
dwarf fleabane (Conyza ramosissima)
dwarf groundcherry (Physalis pumila)
dwarf horseweed (Conyza ramosissima)
dwarf iris (Iris verna)
dwarf larkspur (Delphinium tricorne)
dwarf snapdragon (Chaenorhinum minus)
dwarf St. John's-wort (Hypericum mutilum)
dwarf St. Johnswort (Hypericum mutilum)
dwarf sumac (Rhus copallinum)
dwarf violet iris (Iris verna)
dwarf white trillium (Trillium nivale)
dwarf wild iris (Iris cristata)
dwarfdandelion, potato (Krigia dandelion)
dwarfdandelion, twoflower (Krigia biflora)
dwarfdandelion, Virginia (Krigia virginica)
dwarfdandelion, weedy (Krigia cespitosa)
ear, hairy cat's (Hypochaeris radicata)
ear, spotted cat's (Hypochaeris radicata)
eardrops, ladies' (Brunnichia ovata)
early buttercup (Ranunculus fascicularis)
early cudweed (Gamochaeta purpurea)
early goldenrod (Solidago juncea)
early meadow-rue (Thalictrum dioicum)
early saxifrage (Micranthes virginiensis)
early water avens (Geum vernum)
early wood buttercup (Ranunculus abortivus)
earth, man of the (Ipomoea pandurata)
earth-flesh (Geocarpon minimum)
earthsmoke (Fumaria officinalis)
ease, heart's (Viola tricolor)
ease, heart's (Persicaria maculosa)
eastern annual saltmarsh aster (Symphyotrichum subulatum)
eastern beebalm (Monarda bradburiana)
eastern black walnut (Juglans nigra)
eastern blue-eyed Mary (Collinsia verna)
eastern bluestar (Amsonia tabernaemontana)
eastern bottlebrush grass (Elymus hystrix)
eastern daisy fleabane (Erigeron annuus)
eastern false rue anemone (Isopyrum biternatum)
eastern featherbells (Stenanthium gramineum)
eastern figwort (Scrophularia marilandica)
eastern gama grass (Tripsacum dactyloides)
eastern gamagrass (Tripsacum dactyloides)
eastern greenviolet (Cubelium concolor)
eastern leatherwood (Dirca palustris)
eastern milkpea (Galactia regularis)
eastern mistletoe (Phoradendron leucarpum)
eastern poison ivy (Toxicodendron radicans)
eastern poison oak (Toxicodendron pubescens)
eastern prickly gooseberry (Ribes cynosbati)
eastern prickly pear (Opuntia cespitosa)
eastern purple coneflower (Echinacea purpurea)
eastern redbud (Cercis canadensis)
eastern sweetshrub (Calycanthus floridus)
eastern verbena (Glandularia canadensis)
eastern waterleaf (Hydrophyllum virginianum)
eastern witch-hazel (Hamamelis virginiana)
eastern woodland sedge (Carex blanda)
eastern yampah (Perideridia americana)
egg-leaved skullcap (Scutellaria ovata)
eggs, butter and (Linaria vulgaris)
elder, annual marsh (Iva annua)
elder, marsh (Iva annua)
elderberry, American black (Sambucus canadensis)
elderberry, common (Sambucus canadensis)
elephantsfoot, Carolina (Elephantopus carolinianus)
Elliott's fanpetals (Sida elliottii)
Elliott's sida (Sida elliottii)
enchanter's nightshade (Circaea canadensis)
English bluebell (Hyacinthoides non-scripta)
English plantain (Plantago lanceolata)
English rye grass (Lolium perenne)
erect hedgeparsley (Torilis japonica)
erect primrose willow (Ludwigia decurrens)
Ernest's spiderwort (Tradescantia ernestiana)
eryngo, button (Eryngium yuccifolium)
eryngo, creeping (Eryngium prostratum)
eryngo, spreading (Eryngium prostratum)
etc. (Sorghum bicolor)
eulalia (Microstegium vimineum)
euonymus, brook (Euonymus americanus)
European cranberrybush (Viburnum opulus)
European field pansy (Viola arvensis)
European lily of the valley (Convallaria majalis)
Eve, Adam and (Aplectrum hyemale)
evening campion (Silene latifolia)
everlasting pea (Lathyrus latifolius)
everlasting, pearly (Anaphalis margaritacea)
everlasting, spoonleaf purple (Gamochaeta purpurea)
everlasting, sweet (Pseudognaphalium obtusifolium)
everlasting, western pearly (Anaphalis margaritacea)
evolvulus (Evolvulus nuttallianus)
eye, orange (Buddleja davidii)
eye, pheasant's (Narcissus poeticus)
eyebane (Euphorbia maculata)
eyebane (Euphorbia nutans)
eyes, doll's (Actaea pachypoda)
eyes, Texas green (Berlandiera texana)
fall phlox (Phlox paniculata)
false aloe (Manfreda virginica)
false aster (Boltonia asteroides)
false beech drops (Monotropa hypopitys)
false boneset (Brickellia eupatorioides)
false buckwheat (Fallopia scandens)
false bugbane (Trautvetteria caroliniensis)
false chamomile (Matricaria chamomilla)
false daisy (Eclipta prostrata)
false dandelion (Pyrrhopappus carolinianus)
false dragonhead (Physostegia virginiana)
false foxglove (Aureolaria pectinata)
false foxglove (Dasistoma macrophyllum)
false garlic (Nothoscordum bivalve)
false grape (Ampelopsis cordata)
false hellebore (Veratrum woodii)
false Indian plantain (Hasteola suaveolens)
false indigo (Amorpha fruticosa)
false indigo bush (Amorpha fruticosa)
false mermaid (Floerkea proserpinacoides)
false mermaidweed (Floerkea proserpinacoides)
false nettle (Boehmeria cylindrica)
false pennyroyal (Trichostema brachiatum)
false pimpernel (Lindernia dubia)
false rampion (Campanula rapunculoides)
false rue anemone (Isopyrum biternatum)
false Solomon's seal (Maianthemum racemosum)
false spikenard (Maianthemum racemosum)
false starwort (Boltonia asteroides)
false sunflower (Heliopsis helianthoides)
fame flower (Phemeranthus calycinus)
fameflower, largeflower (Phemeranthus calycinus)
fan clubmoss (Lycopodium digitatum)
fanpetals, Elliott's (Sida elliottii)
fanpetals, prickly (Sida spinosa)
fanwort (Cabomba caroliniana)
fanwort, Carolina (Cabomba caroliniana)
farkleberry (Vaccinium arboreum)
fasiculate false foxglove (Agalinis fasciculata)
fawnlily, midland (Erythronium mesochoreum)
fawnlily, white (Erythronium albidum)
feather finger grass (Chloris virgata)
feather fingergrass (Chloris virgata)
featherbells (Stenanthium gramineum)
featherbells, eastern (Stenanthium gramineum)
featherfoil (Hottonia inflata)
featherfoil, American (Hottonia inflata)
feathers, bride's (Aruncus dioicus)
feathery false lily of the valley (Maianthemum racemosum)
fern, Christmas (Polystichum acrostichoides)
fern, cinnamon (Osmunda cinnamomea)
fern, cut-leaf grape (Sceptridium dissectum)
fern, lowland brittle (Cystopteris protrusa)
fern, northern maidenhair (Adiantum pedatum)
fern, resurrection (Polypodium polypodioides)
fern, royal (Osmunda regalis)
fern, slender lip (Cheilanthes feei)
fern, southern fragile (Cystopteris protrusa)
fern, southern maidenhair (Adiantum capillus-veneris)
fern, Venus hair (Adiantum capillus-veneris)
fern, walking (Asplenium rhizophyllum)
Fernald's yellowcress (Rorippa palustris var. fernaldiana)
fernleaf phacelia (Phacelia bipinnatifida)
feterita (Sorghum bicolor)
fetid marigold (Dyssodia papposa)
feverfew, American (Parthenium hispidum)
feverfew, American (Parthenium integrifolium)
feverwort (Triosteum perfoliatum)
few-bracted bur marigold (Bidens discoidea)
few-flowered tick clover (Hylodesmum pauciflorum)
fewflower tick trefoil (Hylodesmum pauciflorum)
fewflower ticktrefoil (Hylodesmum pauciflorum)
fewleaf sunflower (Helianthus occidentalis)
fiddle dock (Rumex pulcher)
fiddleleaf, oneflower false (Hydrolea uniflora)
field bindweed (Convolvulus arvensis)
field chickweed (Cerastium velutinum)
field clover (Trifolium campestre)
field cottonweed (Froelichia floridana)
field cress (Lepidium campestre)
field garlic (Allium vineale)
field madder (Sherardia arvensis)
field milkwort (Polygala sanguinea)
field pansy (Viola bicolor)
field paspalum (Paspalum laeve)
field penny cress (Thlaspi arvense)
field pennycress (Thlaspi arvense)
field pepper grass (Lepidium campestre)
field pepperweed (Lepidium campestre)
field poppy (Papaver rhoeas)
field pumpkin (Cucurbita pepo)
field sagewort (Artemisia campestris ssp. caudata)
field snake-cotton (Froelichia floridana)
field sorrel (Rumex acetosella)
field sow thistle (Sonchus arvensis)
field sowthistle (Sonchus arvensis)
field thistle (Cirsium arvense)
field thistle (Cirsium discolor)
field woodrush (Luzula campestris)
fieldmadder, blue (Sherardia arvensis)
fig, devil's (Argemone mexicana)
figwort, eastern (Scrophularia marilandica)
figwort, late (Scrophularia marilandica)
filaree (Erodium cicutarium)
fimbry, slender (Fimbristylis autumnalis)
finger coreopsis (Coreopsis palmata)
finger poppy mallow (Callirhoe digitata)
finger speedwell (Veronica triphyllos)
finger wine cup (Callirhoe digitata)
finger, five (Potentilla canadensis)
finger, five (Potentilla simplex)
fingergrass, feather (Chloris virgata)
fire on the mountain (Euphorbia cyathophora)
fire pink (Silene virginica)
fire-on-the-mountain (Euphorbia cyathophora)
fire-wheels (Gaillardia pulchella)
fireweed (Erechtites hieraciifolius)
fishberry (Cocculus carolinus)
five finger (Potentilla canadensis)
five finger (Potentilla simplex)
flag, blue (Iris germanica)
flag, southern blue (Iris virginica)
flag, yellow (Iris pseudacorus)
flame flower (Phemeranthus calycinus)
flannel plant (Verbascum thapsus)
flat-spiked sedge (Carex planispicata)
flat-top goldentop (Euthamia graminifolia)
flatsedge, bearded (Cyperus squarrosus)
flatsedge, globe (Cyperus echinatus)
flatsedge, Great Plains (Cyperus lupulinus)
flatsedge, marsh (Cyperus pseudovegetus)
flatsedge, Plukenet's (Cyperus plukenetii)
flatsedge, rough (Cyperus retrofractus)
flax, common (Linum usitatissimum)
flax, Dutch (Camelina microcarpa)
flax, grooved (Linum sulcatum)
flax, grooved yellow (Linum sulcatum)
flax, littlepod false (Camelina microcarpa)
flax, ridged yellow (Linum sulcatum)
flax, stiff yellow (Linum medium)
flax, sucker (Linum medium)
flax-leaved aster (Ionactis linariifolia)
flaxleaf whitetop aster (Ionactis linariifolia)
flaxweed (Camelina microcarpa)
fleabane, annual (Erigeron annuus)
fleabane, Canada (Conyza canadensis)
fleabane, daisy (Erigeron annuus)
fleabane, daisy (Erigeron strigosus)
fleabane, dwarf (Conyza ramosissima)
fleabane, eastern daisy (Erigeron annuus)
fleabane, inland marsh (Pluchea camphorata)
fleabane, Philadelphia (Erigeron philadelphicus)
fleabane, prairie (Erigeron strigosus)
fleabane, spreading (Conyza ramosissima)
fleabane, whitetop (Erigeron annuus)
fleabane, whitetop (Erigeron strigosus)
flixweed (Descurainia sophia)
floating primrose willow (Ludwigia peploides)
floating primrose-willow (Ludwigia peploides)
Florida lettuce (Lactuca floridana)
flower of an hour (Hibiscus trionum)
flower, Allegheny monkey (Mimulus ringens)
flower, blue cardinal (Lobelia puberula)
flower, blue cardinal (Lobelia siphilitica)
flower, blue cardinal (Lobelia siphilitica)
flower, cardinal (Lobelia cardinalis)
flower, carrion (Smilax lasioneura)
flower, carrion (Smilax pulverulenta)
flower, chigger (Asclepias tuberosa)
flower, fame (Phemeranthus calycinus)
flower, flame (Phemeranthus calycinus)
flower, Fremont's leather (Clematis fremontii)
flower, ghost (Monotropa uniflora)
flower, globe (Cephalanthus occidentalis)
flower, Illinois bundle (Desmanthus illinoensis)
flower, Japanese chaff (Achyranthes japonica)
flower, leather (Clematis pitcheri)
flower, leather (Clematis versicolor)
flower, pale leather (Clematis versicolor)
flower, passion (Passiflora incarnata)
flower, pencil (Stylosanthes biflora)
flower, prairie blanket (Gaillardia aestivalis)
flower, prairie fame (Phemeranthus parviflorus)
flower, procession (Polygala incarnata)
flower, sharpwing monkey (Mimulus alatus)
flower, spider (Cleome hassleriana)
flower, swamp leather (Clematis crispa)
flower, tassel (Brickellia grandiflora)
flower, yellow passion (Passiflora lutea)
flower-of-an-hour (Hibiscus trionum)
flower-of-an-hour, large (Phemeranthus calycinus)
flower-of-an-hour, small (Phemeranthus parviflorus)
flowering dogwood (Cornus florida)
flowering quince (Chaenomeles speciosa)
flowering spurge (Euphorbia corollata)
flowers, diamond (Houstonia nigricans)
fluxweed (Trichostema brachiatum)
fly poison (Amianthium muscitoxicum)
flypoison (Amianthium muscitoxicum)
fogfruit, lanceleaf (Lippia lanceolata)
fogfruit, turkey tangle (Lippia nodiflora)
foldwing, branched (Dicliptera brachiata)
foot, Carolina elephant's (Elephantopus carolinianus)
Forbes' saxifrage (Micranthes pensylvanica var. forbesii)
forest bedstraw (Galium circaezans)
forest phacelia (Phacelia bipinnatifida)
forget-me-not (Myosotis scorpioides)
forget-me-not, giant (Cynoglossum virginianum)
forget-me-not, largeseed (Myosotis macrosperma)
forget-me-not, true (Myosotis scorpioides)
forked bluecurls (Trichostema dichotomum)
forked chickweed (Paronychia fastigiata)
forsythia, weeping (Forsythia suspensa)
four-o'clock, wild (Mirabilis nyctaginea)
fourflower yellow loosestrife (Lysimachia quadriflora)
fourleaf milkweed (Asclepias quadrifolia)
fourleaf yam (Dioscorea quaternata)
foxglove beardtongue (Penstemon digitalis)
foxglove, beach false (Agalinis fasciculata)
foxglove, combleaf yellow false (Aureolaria pectinata)
foxglove, false (Aureolaria pectinata)
foxglove, false (Dasistoma macrophyllum)
foxglove, fasiculate false (Agalinis fasciculata)
foxglove, large flowered false (Aureolaria grandiflora)
foxglove, largeflower yellow false (Aureolaria grandiflora)
foxglove, mullein (Dasistoma macrophyllum)
foxglove, prairie false (Agalinis heterophylla)
foxglove, purple false (Agalinis purpurea)
foxglove, roundstem false (Agalinis gattingeri)
foxglove, Skinner's false (Agalinis skinneriana)
foxglove, slenderleaf false (Agalinis tenuifolia)
foxglove, smooth false (Aureolaria flava)
foxglove, smooth yellow false (Aureolaria flava)
foxtail dalea (Dalea leporina)
foxtail prairie clover (Dalea leporina)
foxtail, Chinese (Setaria faberi)
foxtail, giant (Setaria faberi)
foxtail, green (Setaria viridis)
foxtail, nodding (Setaria faberi)
fragrant bedstraw (Galium triflorum)
fragrant cudweed (Pseudognaphalium obtusifolium)
fragrant sumac (Rhus aromatica)
fragrant water lily (Nymphaea odorata)
Frank's sedge (Carex frankii)
freeway aster (Symphyotrichum subulatum)
Fremont's leather flower (Clematis fremontii)
French grass (Orbexilum onobrychis)
French mulberry (Callicarpa americana)
French-grass (Orbexilum onobrychis)
fringe tree (Chionanthus virginicus)
fringed bluestar (Amsonia ciliata)
fringed loosestrife (Lysimachia ciliata)
fringed nutrush (Scleria ciliata)
fringed poppy mallow (Callirhoe digitata)
fringed quickweed (Galinsoga quadriradiata)
fringed sedge (Carex crinita)
fringeleaf ruellia (Ruellia humilis)
fringeleaf wild petunia (Ruellia humilis)
fringetree, white (Chionanthus virginicus)
frogbit, American (Limnobium spongia)
frost weed (Verbesina virginica)
fruit, common fog (Lippia nodiflora)
fruit, common frog (Lippia nodiflora)
fruit, northern fog (Lippia lanceolata)
fruit, northern frog (Lippia lanceolata)
Fuller's teasel (Dipsacus fullonum)
fumewort (Fumaria officinalis)
fumewort, curvepod (Corydalis aurea ssp. occidentalis)
fumewort, mealy (Corydalis crystallina)
fumewort, slender (Corydalis micrantha)
fumewort, smallflower (Corydalis micrantha)
fumewort, yellow (Corydalis flavula)
fumitory (Fumaria officinalis)
fumitory, drug (Fumaria officinalis)
fuzzy phacelia (Phacelia hirsuta)
fuzzy wuzzy sedge (Carex hirsutella)
fuzzybean, pink (Strophostyles umbellata)
fuzzybean, slickseed (Strophostyles leiosperma)
gaillardia, prairie (Gaillardia aestivalis)
gamagrass, eastern (Tripsacum dactyloides)
garden asparagus (Asparagus officinalis)
garden balsam (Impatiens balsamina)
garden cornflower (Centaurea cyanus)
garden cosmos (Cosmos bipinnatus)
garden hyacinth (Hyacinthus orientalis)
garden larkspur (Delphinium ajacis)
garden onion (Allium cepa)
garden phlox (Phlox paniculata)
garden radish (Raphanus sativus)
garden rocket (Delphinium consolida)
garden stonecrop (Sedum erythrostictum)
garden vetch (Vicia sativa)
garden yellowrocket (Barbarea vulgaris)
garlic (Allium sativum)
garlic chive (Allium tuberosum)
garlic mustard (Alliaria petiolata)
garlic, cultivated (Allium sativum)
garlic, false (Nothoscordum bivalve)
garlic, field (Allium vineale)
garlic, meadow (Allium canadense)
garlic, wild (Allium vineale)
garlic, wild (Allium canadense)
Gattinger's prairie clover (Dalea gattingeri)
gaura, large-flowered (Oenothera filiformis)
gaura, velvety (Oenothera curtiflora)
gayfeather (Liatris pycnostachya)
gayfeather (Liatris scariosa)
gayfeather (Liatris squarrosa)
gayfeather (Liatris squarrulosa)
gayfeather, rough (Liatris aspera)
gentain, prairie (Gentiana puberulenta)
gentian, bottle (Gentiana andrewsii)
gentian, closed (Gentiana andrewsii)
gentian, closed bottle (Gentiana andrewsii)
gentian, common horse (Triosteum perfoliatum)
gentian, downy (Gentiana puberulenta)
gentian, green (Frasera caroliniensis)
gentian, red-fruited horse (Triosteum aurantiacum)
gentian, stiff (Gentianella quinquefolia)
gentian, yellow-flowered horse (Triosteum angustifolium)
geocarpon (Geocarpon minimum)
geranium, Carolina (Geranium carolinianum)
geranium, cutleaf (Geranium dissectum)
geranium, dovefoot (Geranium molle)
geranium, small (Geranium pusillum)
geranium, spotted (Geranium maculatum)
geranium, wild (Geranium maculatum)
gerardia (Agalinis heterophylla)
gerardia, big-flowered (Aureolaria grandiflora)
gerardia, common (Agalinis tenuifolia)
gerardia, midwestern (Agalinis skinneriana)
gerardia, pale (Agalinis skinneriana)
gerardia, rough-stemmed (Agalinis gattingeri)
gerardia, slender (Agalinis tenuifolia)
gerardia, smooth (Agalinis purpurea)
German chamomile (Matricaria chamomilla)
German iris (Iris germanica)
German knotgrass (Scleranthus annuus)
germander, American (Teucrium canadense)
germander, Canada (Teucrium canadense)
Geyer's sandmat (Euphorbia geyeri)
Geyer's spurge (Euphorbia geyeri)
ghost flower (Monotropa uniflora)
giant bur-reed (Sparganium eurycarpum)
giant forget-me-not (Cynoglossum virginianum)
giant foxtail (Setaria faberi)
giant ironweed (Vernonia gigantea ssp. gigantea)
giant ragweed (Ambrosia trifida)
giant St. John's-wort (Hypericum ascyron ssp. pyramidatum)
giant tick clover (Desmodium canadense)
gill-over-the-ground (Glechoma hederacea)
ginger, wild (Asarum canadense)
ginseng (Panax quinquefolius)
ginseng, American (Panax quinquefolius)
glade coneflower (Echinacea simulata)
gladecress, Michaux's (Leavenworthia uniflora)
glass, clasping Venus' looking (Triodanis perfoliata)
glass, prairie Venus' looking (Triodanis leptocarpa)
glass, slender-leaved Venus' looking (Triodanis leptocarpa)
glaucous campion (Silene csereii)
globe beaksedge (Rhynchospora globularis)
globe flatsedge (Cyperus echinatus)
globe flower (Cephalanthus occidentalis)
globe sedge (Carex grayi)
globethistle, great (Echinops sphaerocephalus)
glory, bigroot morning (Ipomoea pandurata)
glory, blue morning (Ipomoea hederacea)
glory, common morning (Ipomoea purpurea)
glory, ivy-leaved morning (Ipomoea hederacea)
glory, red morning (Ipomoea coccinea)
glory, small white morning (Ipomoea lacunosa)
glory, smallflower morning (Jacquemontia tamnifolia)
glory, wild morning (Calystegia sepium)
glossy-leaved aster (Symphyotrichum puniceum)
goat's beard (Aruncus dioicus)
goat's rue (Tephrosia virginiana)
gold-of-pleasure (Camelina microcarpa)
golden aster (Heterotheca camporum var. camporum)
golden aster (Heterotheca camporum var. glandulissima)
golden buttons (Tanacetum vulgare)
golden chamomile (Cota tinctoria ssp. subtinctoria)
golden corydalis (Corydalis aurea ssp. occidentalis)
golden currant (Ribes odoratum)
golden marguerite (Cota tinctoria ssp. subtinctoria)
golden ragwort (Packera aurea)
golden selenia (Selenia aurea)
golden tickseed (Coreopsis tinctoria)
golden zizia (Zizia aurea)
goldenaster, lemonyellow false (Heterotheca camporum var. camporum)
goldenaster, lemonyellow false (Heterotheca camporum var. glandulissima)
goldenaster, soft (Bradburia pilosa)
goldenglow, wild (Rudbeckia laciniata)
goldenrod (Solidago buckleyi)
goldenrod (Solidago riddellii)
goldenrod, broadleaf (Solidago flexicaulis)
goldenrod, Buckley's (Solidago buckleyi)
goldenrod, Canada (Solidago altissima)
goldenrod, common flat-topped (Euthamia graminifolia)
goldenrod, downy (Solidago petiolaris)
goldenrod, downy ragged (Solidago petiolaris)
goldenrod, early (Solidago juncea)
goldenrod, gray (Solidago nemoralis)
goldenrod, Mississippi Valley flat-topped (Euthamia leptocephala)
goldenrod, old-field (Solidago nemoralis)
goldenrod, Ozark (Solidago drummondii)
goldenrod, prairie (Solidago ptarmicoides)
goldenrod, prairie (Solidago speciosa)
goldenrod, Riddell's (Solidago riddellii)
goldenrod, rigid (Solidago rigida)
goldenrod, rough (Solidago radula)
goldenrod, rough-leaved (Solidago rugosa)
goldenrod, rough-stemmed (Solidago rugosa)
goldenrod, showy (Solidago speciosa)
goldenrod, stiff (Solidago rigida)
goldenrod, tall (Solidago altissima)
goldenrod, western rough (Solidago radula)
goldenrod, wrinkleleaf (Solidago drummondii)
goldenrod, wrinkleleaf (Solidago rugosa)
goldenrod, zigzag (Solidago flexicaulis)
goldenseal (Hydrastis canadensis)
goldentop, bushy (Euthamia leptocephala)
goldentop, flat-top (Euthamia graminifolia)
goldstar, common (Hypoxis hirsuta)
goose grass (Eleusine indica)
goose grass (Galium aparine)
gooseberry, eastern prickly (Ribes cynosbati)
gooseberry, Missouri (Ribes missouriense)
gooseberry, prickly (Ribes cynosbati)
gooseberry, southern (Vaccinium stamineum)
gooseberry, wild (Ribes missouriense)
goosefoot, clammy (Chenopodium pumilio)
goosefoot, maple-leaved (Chenopodium simplex)
goosefoot, mapleleaf (Chenopodium simplex)
goosegrass, Indian (Eleusine indica)
gourd, buffalo (Cucurbita foetidissima)
gourd, Missouri (Cucurbita foetidissima)
gourd, wild pear (Cucurbita pepo)
gourd, yellow-flowered (Cucurbita pepo)
goutweed, bishop's (Aegopodium podagraria)
grama, blue (Bouteloua gracilis)
grama, hairy (Bouteloua hirsuta)
grama, sideoats (Bouteloua curtipendula)
grape, false (Ampelopsis cordata)
grape, raccoon (Ampelopsis cordata)
grape, sand (Vitis rupestris)
grapefern, cutleaf (Sceptridium dissectum)
grass pink (Calopogon tuberosus)
grass sedge (Carex jamesii)
grass, barnyard (Echinochloa crus-galli)
grass, Bermuda (Cynodon dactylon)
grass, billion dollar (Echinochloa crus-galli)
grass, blue-eyed (Sisyrinchium albidum)
grass, bottlebrush (Elymus hystrix)
grass, broadleaf spike (Chasmanthium latifolium)
grass, buffalo (Buchloe dactyloides)
grass, curly oat (Danthonia spicata)
grass, eastern bottlebrush (Elymus hystrix)
grass, eastern gama (Tripsacum dactyloides)
grass, English rye (Lolium perenne)
grass, feather finger (Chloris virgata)
grass, field pepper (Lepidium campestre)
grass, French (Orbexilum onobrychis)
grass, goose (Eleusine indica)
grass, goose (Galium aparine)
grass, hairy nut (Scleria ciliata)
grass, Italian rye (Lolium perenne)
grass, Johnson (Sorghum halepense)
grass, orange (Hypericum gentianoides)
grass, orchard (Dactylis glomerata)
grass, panic (Panicum boscii)
grass, panic (Panicum scoparium)
grass, panic (Panicum sphaerocarpon)
grass, pepper (Lepidium virginicum)
grass, perennial rye (Lolium perenne)
grass, poor man's pepper (Lepidium virginicum)
grass, poverty (Danthonia spicata)
grass, prairie blue-eyed (Sisyrinchium campestre)
grass, rib (Plantago lanceolata)
grass, sang (Brachyelytrum erectum)
grass, stink (Eragrostis cilianensis)
grass, Sudan (Sorghum bicolor)
grass, tall nut (Scleria triglomerata)
grass, umbrella (Fuirena simplex)
grass, Vasey (Paspalum urvillei)
grass, Vasey's (Paspalum urvillei)
grass, vernal whitlow (Draba verna)
grass, Virginia pepper (Lepidium virginicum)
grass, water scorpion (Myosotis scorpioides)
grass, white blue-eyed (Sisyrinchium albidum)
grass, white-eyed (Sisyrinchium campestre)
grass, whitlow (Draba brachycarpa)
grass, whitlow (Draba cuneifolia)
grass, yard (Eleusine indica)
grass, yellow star (Hypoxis hirsuta)
grass-leaved rush (Juncus marginatus)
grass-of-Parnassus (Parnassia grandifolia)
grassleaf mudplantain (Heteranthera dubia)
grassleaf rush (Juncus marginatus)
grasspink, tuberous (Calopogon tuberosus)
gravelweed (Verbesina helianthoides)
graveyard spurge (Euphorbia cyparissias)
gray chickweed (Cerastium brachypetalum)
gray dogwood (Cornus foemina)
gray field speedwell (Veronica polita)
gray goldenrod (Solidago nemoralis)
gray mouse-ear chickweed (Cerastium brachypetalum)
gray polypody (Polypodium polypodioides)
gray scurf pea (Pediomelum tenuiflorum)
Gray's sedge (Carex grayi)
gray-green wood sorrel (Oxalis dillenii)
grayhead prairie coneflower (Ratibida pinnata)
great blue lobelia (Lobelia siphilitica)
great blue lobelia (Lobelia siphilitica)
great globethistle (Echinops sphaerocephalus)
great Indian plantain (Arnoglossum reniforme)
Great Plains flatsedge (Cyperus lupulinus)
great ragweed (Ambrosia trifida)
great St. John's-wort (Hypericum ascyron ssp. pyramidatum)
great St. Johnswort (Hypericum ascyron ssp. pyramidatum)
great waterleaf (Hydrophyllum appendiculatum)
great white lettuce (Nabalus crepidineus)
greater bladderwort (Utricularia vulgaris)
greater periwinkle (Vinca major)
Greek valerian (Polemonium reptans)
green adder's mouth (Malaxis unifolia)
green adder's-mouth orchid (Malaxis unifolia)
green amaranth (Amaranthus hybridus)
green antelopehorn (Asclepias viridis)
green bristlegrass (Setaria viridis)
green bulrush (Scirpus atrovirens)
green carpetweed (Mollugo verticillata)
green comet milkweed (Asclepias viridiflora)
green foxtail (Setaria viridis)
green fringed orchid (Platanthera lacera)
green gentian (Frasera caroliniensis)
green milkweed (Asclepias viridiflora)
green milkweed (Asclepias hirtella)
green rockcress (Boechera missouriensis)
green trillium (Trillium viride)
green violet (Cubelium concolor)
green-flowered milkweed (Asclepias viridis)
green-stemmed Joe-pye weed (Eutrochium purpureum)
greenbrier (Smilax bona-nox)
greenbrier, saw (Smilax bona-nox)
greeneyes, Texas (Berlandiera texana)
greenthread, Colorado (Thelesperma megapotamicum)
greenthread, Hopi tea (Thelesperma megapotamicum)
greenviolet, eastern (Cubelium concolor)
gromwell, American (Lithospermum latifolium)
gromwell, corn (Buglossoides arvensis)
gromwell, western false (Onosmodium molle)
grooved flax (Linum sulcatum)
grooved yellow flax (Linum sulcatum)
groovestem Indian plantain (Arnoglossum plantagineum)
ground ivy (Glechoma hederacea)
ground plum (Astragalus crassicarpus var. trichocalyx)
groundcherry, clammy (Physalis heterophylla)
groundcherry, cutleaf (Physalis angulata)
groundcherry, dwarf (Physalis pumila)
groundcherry, longleaf (Physalis longifolia)
groundcherry, Virginia (Physalis virginiana)
groundfig spurge (Euphorbia prostrata)
groundnut (Apios americana)
groundpine, tree (Lycopodium dendroideum)
groundplum milkvetch (Astragalus crassicarpus var. trichocalyx)
groundsel, common (Senecio vulgaris)
groundsel, prairie (Packera plattensis)
groundsel, roundleaf (Packera obovata)
Guadeloupe cucumber (Melothria pendula)
Guelder rose (Viburnum opulus)
gumweed, curlycup (Grindelia squarrosa)
gumweed, curlytop (Grindelia squarrosa)
gumweed, narrowleaf (Grindelia lanceolata)
gumweed, spiny-toothed (Grindelia lanceolata)
gypsyflower (Cynoglossum officinale)
hairgrass (Aira elegans)
hairgrass, annual silver (Aira elegans)
hairgrass, silver (Aira caryophyllea)
hairsedge, densetuft (Bulbostylis capillaris)
hairy angelica (Angelica venenosa)
hairy bedstraw (Galium pilosum)
hairy bittercress (Cardamine hirsuta)
hairy bush clover (Lespedeza hirta)
hairy buttercup (Ranunculus sardous)
hairy cat's ear (Hypochaeris radicata)
hairy clustervine (Jacquemontia tamnifolia)
hairy crabweed (Fatoua villosa)
hairy forked nailwort (Paronychia fastigiata)
hairy grama (Bouteloua hirsuta)
hairy hedgenettle (Stachys pilosa)
hairy leafcup (Smallanthus uvedalia)
hairy lespedeza (Lespedeza hirta)
hairy mountain mint (Pycnanthemum pilosum)
hairy nailwort (Paronychia fastigiata)
hairy nightshade (Solanum sarrachoides)
hairy nut grass (Scleria ciliata)
hairy pagoda-plant (Blephilia hirsuta)
hairy parsley (Lomatium foeniculaceum)
hairy pinweed (Lechea mucronata)
hairy primrose willow (Ludwigia leptocarpa)
hairy rose mallow (Hibiscus lasiocarpos)
hairy skullcap (Scutellaria elliptica)
hairy sunflower (Helianthus hirsutus)
hairy white oldfield aster (Symphyotrichum pilosum)
hairy wildrye (Elymus villosus)
hairy woodland brome (Bromus pubescens)
hairyfruit chervil (Chaerophyllum tainturieri)
hairyjoint meadowparsnip (Thaspium barbinode)
halberd-leaved rose mallow (Hibiscus laevis)
halberd-leaved tear-thumb (Persicaria arifolia)
halberdleaf rosemallow (Hibiscus laevis)
halberdleaf tearthumb (Persicaria arifolia)
handsome Harry (Rhexia virginica)
harbinger of spring (Erigenia bulbosa)
hardy catalpa (Catalpa speciosa)
hare's foot dalea (Dalea leporina)
harebell (Campanula rotundifolia)
harlequin, yellow (Corydalis flavula)
Harry, handsome (Rhexia virginica)
harvest lice (Agrimonia parviflora)
harvestlice (Agrimonia parviflora)
Harvey's buttercup (Ranunculus harveyi)
hat, Mexican (Ratibida columnifera)
hawksbeard, small-flowered (Crepis pulchra)
hawksbeard, smallflower (Crepis pulchra)
hawkweed, beaked (Hieracium gronovii)
hazel alder (Alnus serrulata)
heal-all (Prunella vulgaris)
heart's ease (Viola tricolor)
heart's ease (Persicaria maculosa)
heart-leaved skullcap (Scutellaria ovata)
heart-leaved tragia (Tragia cordata)
heart-leaved umbrellawort (Mirabilis nyctaginea)
heart-podded hoary cress (Lepidium draba)
heart-podded white top (Lepidium draba)
heartleaf ampelopsis (Ampelopsis cordata)
heartleaf four o'clock (Mirabilis nyctaginea)
heartleaf noseburn (Tragia cordata)
heartleaf peppervine (Ampelopsis cordata)
heartleaf plantain (Plantago cordata)
heartleaf skullcap (Scutellaria ovata)
hearts, blue (Buchnera americana)
heartweed (Persicaria maculosa)
heartwing sorrel (Rumex hastatulus)
heaven, tree of (Ailanthus altissimus)
hedge bindweed (Calystegia sepium)
hedge bindweed (Calystegia silvatica)
hedge false bindweed (Calystegia sepium)
hedge hyssop (Gratiola neglecta)
hedge hyssop (Gratiola virginiana)
hedge-parsley, Japanese (Torilis japonica)
hedgehog club rush (Cyperus echinatus)
hedgehyssop, clammy (Gratiola neglecta)
hedgehyssop, roundfruit (Gratiola virginiana)
hedgenettle, hairy (Stachys pilosa)
hedgenettle, smooth (Stachys tenuifolia)
hedgenettle, woolly (Stachys byzantina)
hedgeparsley, erect (Torilis japonica)
heliopsis, sunflower (Heliopsis helianthoides)
heliotrope, Indian (Heliotropium indicum)
heliotrope, pasture (Heliotropium tenellum)
hell vine (Campsis radicans)
hellebore, false (Veratrum woodii)
helleborine (Epipactis helleborine)
helleborine, broadleaf (Epipactis helleborine)
hemlock waterparsnip (Sium suave)
hemlock, common water (Cicuta maculata)
hemlock, poison (Conium maculatum)
hemlock, spotted water (Cicuta maculata)
hemp, Indian (Apocynum cannabinum)
hempnettle, brittlestem (Galeopsis tetrahit)
hempvine, climbing (Mikania scandens)
hempweed, climbing (Mikania scandens)
henbit (Lamium amplexicaule)
henbit deadnettle (Lamium amplexicaule)
hens and roosters (Viola pedata)
hepatica, round-lobed (Hepatica americana)
hepatica, roundlobe (Hepatica americana)
hepatica, sharp-lobed (Hepatica acutiloba)
hepatica, sharplobe (Hepatica acutiloba)
herb sophia (Descurainia sophia)
herb, cinnamon willow (Epilobium coloratum)
herb, purple-leaved willow (Epilobium coloratum)
herbwilliam (Ptilimnium capillaceum)
Hercules' club (Aralia spinosa)
hickory, mockernut (Carya tomentosa)
hickory, white (Carya tomentosa)
highbush blackberry (Rubus argutus)
highbush huckleberry (Vaccinium stamineum)
hillside blueberry (Vaccinium pallidum)
hispid buttercup (Ranunculus hispidus)
hoary alyssum (Berteroa incana)
hoary bitter cress (Cardamine hirsuta)
hoary mock orange (Philadelphus pubescens)
hoary pea (Tephrosia virginiana)
hoary plantain (Plantago virginica)
hoary puccoon (Lithospermum canescens)
hoary skullcap (Scutellaria incana)
hoary verbena (Verbena stricta)
hoary vervain (Verbena stricta)
hog peanut (Amphicarpaea bracteata)
hog weed (Conyza canadensis)
hogpeanut, American (Amphicarpaea bracteata)
hogweed (Ambrosia artemisiifolia)
hogweed, little (Portulaca oleracea)
hogwort (Croton capitatus)
hollow-stemmed Joe-pye weed (Eutrochium fistulosum)
hollyhock (Alcea rosea)
hollyleaved barberry (Mahonia aquifolium)
honewort (Cryptotaenia canadensis)
honewort, Canadian (Cryptotaenia canadensis)
honeyball (Cephalanthus occidentalis)
honeysuckle, Amur (Lonicera maackii)
honeysuckle, bush (Lonicera maackii)
honeysuckle, coral (Lonicera sempervirens)
honeysuckle, Japanese (Lonicera japonica)
honeysuckle, trumpet (Lonicera sempervirens)
honeysuckle, wild (Aquilegia canadensis)
honeysuckle, wild (Lonicera fragrantissima)
honeysuckle, winter (Lonicera fragrantissima)
honeyvine (Cynanchum laeve)
honeyweed (Leonurus japonicus)
hooded arrowhead (Sagittaria calycina)
hooked crowfoot (Ranunculus recurvatus)
hop, common (Humulus lupulus)
hop, Japanese (Humulus japonicus)
Hopi tea (Thelesperma megapotamicum)
Hopi tea greenthread (Thelesperma megapotamicum)
hops, common (Humulus lupulus)
hops, Japanese (Humulus japonicus)
hoptree, common (Ptelea trifoliata)
horehound, American water (Lycopus americanus)
horehound, Virginia water (Lycopus virginicus)
hornpod, lax (Mitreola petiolata)
hornseed buttercup (Ceratocephalus testiculatus)
horse balm (Collinsonia canadensis)
horse chestnut (Aesculus hippocastanum)
horse nettle (Solanum carolinense)
horse weed (Ambrosia trifida)
horse-gentian, orangefruit (Triosteum aurantiacum)
horse-gentian, yellowfruit (Triosteum angustifolium)
horsemint (Monarda fistulosa)
horsemint (Monarda punctata)
horsenettle, Carolina (Solanum carolinense)
horsetail milkweed (Asclepias subverticillata)
horsetail milkweed (Asclepias verticillata)
horsetail, scouringrush (Equisetum hyemale)
horseweed (Conyza canadensis)
horseweed, Canadian (Conyza canadensis)
horseweed, dwarf (Conyza ramosissima)
hortulan plum (Prunus hortulana)
hour, flower of an (Hibiscus trionum)
houstonia, mountain (Houstonia purpurea)
huckleberry, highbush (Vaccinium stamineum)
huckleberry, squaw (Vaccinium stamineum)
husk tomato (Physalis pubescens)
hyacinth, common grape (Muscari botryoides)
hyacinth, garden (Hyacinthus orientalis)
hyacinth, wild (Camassia scilloides)
hydrangea, American (Hydrangea arborescens)
hydrangea, oakleaf (Hydrangea quercifolia)
hydrangea, smooth (Hydrangea arborescens)
hydrangea, wild (Hydrangea arborescens)
hydrolea (Hydrolea uniflora)
hyssop, clammy hedge (Gratiola neglecta)
hyssop, hedge (Gratiola neglecta)
hyssop, hedge (Gratiola virginiana)
hyssop, round-fruited hedge (Gratiola virginiana)
hyssop, water (Bacopa rotundifolia)
hyssop, yellow giant (Agastache nepetoides)
hyssop-leaved thoroughwort (Eupatorium hyssopifolium)
hyssopleaf thoroughwort (Eupatorium hyssopifolium)
Illinois bundle flower (Desmanthus illinoensis)
Illinois bundleflower (Desmanthus illinoensis)
Indian bean (Catalpa speciosa)
Indian blanket (Castilleja coccinea)
Indian blanket (Gaillardia pulchella)
Indian breadroot (Pediomelum esculentum)
Indian chickweed (Mollugo verticillata)
Indian goosegrass (Eleusine indica)
Indian heliotrope (Heliotropium indicum)
Indian hemp (Apocynum cannabinum)
Indian jointvetch (Aeschynomene indica)
Indian millet (Echinochloa crus-galli)
Indian paintbrush (Castilleja coccinea)
Indian pink (Spigelia marilandica)
Indian pipe (Monotropa uniflora)
Indian plantain (Arnoglossum plantagineum)
Indian strawberry (Duchesnea indica)
Indian tobacco (Antennaria parlinii)
Indian tobacco (Lobelia inflata)
Indian turnip (Arisaema triphyllum)
Indian woodoats (Chasmanthium latifolium)
Indian-tobacco (Lobelia inflata)
Indianhemp (Apocynum cannabinum)
Indianpipe (Monotropa uniflora)
indigo, blue false (Baptisia australis)
indigo, blue wild (Baptisia australis)
indigo, cream white (Baptisia bracteata)
indigo, false (Amorpha fruticosa)
indigo, long-bracted wild (Baptisia bracteata)
indigo, longbract wild (Baptisia bracteata)
indigo, plains wild (Baptisia bracteata)
indigo, white wild (Baptisia alba)
inflated lobelia (Lobelia inflata)
inland marsh fleabane (Pluchea camphorata)
inland New Jersey tea (Ceanothus herbaceus)
inland saltmarsh aster (Symphyotrichum subulatum)
inland sea oats (Chasmanthium latifolium)
innocence (Houstonia caerulea)
ipecac, American (Gillenia stipulata)
iris, copper (Iris fulva)
iris, crested (Iris cristata)
iris, dwarf (Iris verna)
iris, dwarf crested (Iris cristata)
iris, dwarf violet (Iris verna)
iris, dwarf wild (Iris cristata)
iris, German (Iris germanica)
iris, paleyellow (Iris pseudacorus)
iris, prairie (Nemastylis geminiflora)
iris, red (Iris fulva)
iris, Virginia (Iris virginica)
iris, yellow (Iris pseudacorus)
ironweed (Vernonia arkansana)
ironweed, Arkansas (Vernonia arkansana)
ironweed, Baldwin's (Vernonia baldwinii)
ironweed, giant (Vernonia gigantea ssp. gigantea)
ironweed, Missouri (Vernonia missurica)
ironweed, tall (Vernonia gigantea ssp. gigantea)
ironweed, western (Vernonia baldwinii)
ironweed, yellow (Verbesina alternifolia)
Italian rye grass (Lolium perenne)
ivy, eastern poison (Toxicodendron radicans)
ivy, ground (Glechoma hederacea)
ivy, poison (Toxicodendron radicans)
ivy-leaved morning glory (Ipomoea hederacea)
ivy-leaved speedwell (Veronica hederifolia)
ivyleaf morning-glory (Ipomoea hederacea)
ivyleaf speedwell (Veronica hederifolia)
Jack in the pulpit (Arisaema triphyllum)
Jack-in-the-pulpit (Arisaema triphyllum)
Jacob's ladder (Polemonium reptans)
jagged chickweed (Holosteum umbellatum)
James' sedge (Carex jamesii)
Japanese bamboo (Fallopia japonica)
Japanese bristlegrass (Setaria faberi)
Japanese chaff flower (Achyranthes japonica)
Japanese clover (Kummerowia striata)
Japanese hedge-parsley (Torilis japonica)
Japanese honeysuckle (Lonicera japonica)
Japanese hop (Humulus japonicus)
Japanese hops (Humulus japonicus)
Japanese knotweed (Fallopia japonica)
Japanese lespedeza (Kummerowia striata)
Japanese mazus (Mazus pumilus)
Japanese millet (Echinochloa crus-galli)
Japanese quince (Chaenomeles speciosa)
Japanese rose (Rosa multiflora)
Japanese rose (Rosa rugosa)
Japanese snowball (Viburnum plicatum)
Japanese stiltgrass (Microstegium vimineum)
jasmine, blue (Clematis crispa)
jasmine, western rock (Androsace occidentalis)
Java-bean (Senna obtusifolia)
jenny, creeping (Lysimachia nummularia)
Jersey tea (Ceanothus herbaceus)
Jerusalem artichoke (Helianthus tuberosus)
jet bead (Rhodotypos scandens)
jetbead (Rhodotypos scandens)
jewelweed (Impatiens capensis)
jewelweed (Impatiens pallida)
Jim Hill mustard (Sisymbrium altissimum)
jimsonweed (Datura stramonium)
jimsonweed, common (Datura stramonium)
John's cabbage (Hydrophyllum virginianum)
John's-wort, common St. (Hypericum perforatum)
John's-wort, dwarf St. (Hypericum mutilum)
John's-wort, giant St. (Hypericum ascyron ssp. pyramidatum)
John's-wort, great St. (Hypericum ascyron ssp. pyramidatum)
John's-wort, round-fruited St. (Hypericum sphaerocarpum)
John's-wort, shrubby St. (Hypericum prolificum)
John's-wort, spotted St. (Hypericum punctatum)
johnny jumpup (Viola tricolor)
Johnny-jump-up (Viola bicolor)
Johnny-jump-up (Viola tricolor)
Johnson grass (Sorghum halepense)
Johnsongrass (Sorghum halepense)
Johnswort, common St. (Hypericum perforatum)
Johnswort, dwarf St. (Hypericum mutilum)
Johnswort, great St. (Hypericum ascyron ssp. pyramidatum)
Johnswort, roundseed St. (Hypericum sphaerocarpum)
Johnswort, shrubby St. (Hypericum prolificum)
Johnswort, spotted St. (Hypericum punctatum)
jointed charlock (Raphanus raphanistrum)
jointvetch, Indian (Aeschynomene indica)
jointvetch, rough (Aeschynomene rudis)
jointvetch, zigzag (Aeschynomene rudis)
jointweed (Polygonum americanum)
jointweed, southern (Polygonum americanum)
Juda's bush (Iresine rhizomatosa)
Judas tree (Cercis canadensis)
jumpseed (Persicaria virginiana)
jumpup, johnny (Viola tricolor)
June berry (Amelanchier arborea)
juniper leaf (Polypremum procumbens)
juniper-leaf (Polypremum procumbens)
Kafir corn (Sorghum bicolor)
Kansas thistle (Solanum rostratum)
Kentucky bluegrass (Poa pratensis)
kiss me quick (Portulaca pilosa)
Klamath weed (Hypericum perforatum)
knapweed, spotted (Centaurea stoebe)
knawel (Scleranthus annuus)
knawel, annual (Scleranthus annuus)
knight's-spur, doubtful (Delphinium ajacis)
knight's-spur, royal (Delphinium consolida)
knotgrass, German (Scleranthus annuus)
knotweed, bushy (Polygonum ramosissimum ssp. ramosissimum)
knotweed, curlytop (Persicaria lapathifolia)
knotweed, denseflower (Persicaria glabra)
knotweed, Japanese (Fallopia japonica)
knotweed, long-fruited (Polygonum ramosissimum ssp. ramosissimum)
knotweed, marshpepper (Persicaria hydropiper)
knotweed, Virginia (Persicaria virginiana)
Korean clover (Kummerowia stipulacea)
Korean lespedeza (Kummerowia stipulacea)
kudzu (Pueraria montana var. lobata)
Kunth's evening primrose (Oenothera kunthiana)
lace, Queen Anne's (Daucus carota)
laceflower (Ptilimnium nuttallii)
ladder, Jacob's (Polemonium reptans)
ladies' eardrops (Brunnichia ovata)
ladies' tobacco (Antennaria parlinii)
ladies, Quaker (Houstonia caerulea)
Ladino clover (Trifolium repens)
lady's thumb (Persicaria maculosa)
ladysthumb, spotted (Persicaria maculosa)
lake cress (Rorippa aquatica)
lakecress (Rorippa aquatica)
lamb's lettuce (Valerianella locusta)
lamb's lettuce (Valerianella radiata)
lamb's quarters (Chenopodium album)
lambsquarters (Chenopodium album)
lance-leaved sage (Salvia reflexa)
lanceleaf blanketflower (Gaillardia aestivalis)
lanceleaf buckthorn (Rhamnus lanceolata)
lanceleaf fogfruit (Lippia lanceolata)
lanceleaf loosestrife (Lysimachia lanceolata)
lanceleaf ragweed (Ambrosia bidentata)
lanceleaf sage (Salvia reflexa)
lanceleaf tickseed (Coreopsis lanceolata)
lantana (Lantana)
large bellwort (Uvularia grandiflora)
large buttonweed (Diodia virginiana)
large flower-of-an-hour (Phemeranthus calycinus)
large flowered false foxglove (Aureolaria grandiflora)
large hop clover (Trifolium campestre)
large Indian breadroot (Pediomelum esculentum)
large twayblade (Liparis liliifolia)
large yellow vetch (Vicia grandiflora)
large-flowered gaura (Oenothera filiformis)
large-flowered tick clover (Hylodesmum glutinosum)
large-seeded mercury (Acalypha deamii)
largebract tick trefoil (Desmodium cuspidatum)
largebract ticktrefoil (Desmodium cuspidatum)
largebracted plantain (Plantago aristata)
largeflower bellwort (Uvularia grandiflora)
largeflower fameflower (Phemeranthus calycinus)
largeflower tickseed (Coreopsis grandiflora)
largeflower yellow false foxglove (Aureolaria grandiflora)
largeleaf grass of Parnassus (Parnassia grandifolia)
largeleaf phlox (Phlox amplifolia)
largeseed forget-me-not (Myosotis macrosperma)
larkspur, Carolina (Delphinium carolinianum)
larkspur, Carolina (Delphinium carolinianum ssp. virescens)
larkspur, dwarf (Delphinium tricorne)
larkspur, garden (Delphinium ajacis)
larkspur, prairie (Delphinium carolinianum)
larkspur, prairie (Delphinium carolinianum ssp. virescens)
larkspur, rocket (Delphinium ajacis)
larkspur, tall (Delphinium exaltatum)
larkspur, wild blue (Delphinium carolinianum)
late boneset (Eupatorium serotinum)
late figwort (Scrophularia marilandica)
late purple aster (Symphyotrichum patens)
lateflowering thoroughwort (Eupatorium serotinum)
lax hornpod (Mitreola petiolata)
lead plant (Amorpha canescens)
leadplant (Amorpha canescens)
leaf, juniper (Polypremum procumbens)
leaf, painted (Euphorbia cyathophora)
leaf-flower, Carolina (Phyllanthus caroliniensis)
leafcup, hairy (Smallanthus uvedalia)
leafcup, whiteflower (Polymnia canadensis)
leastdaisy, Arkansas (Chaetopappa asteroides)
leather flower (Clematis pitcheri)
leather flower (Clematis versicolor)
leatherleaf arrowwood (Viburnum rhytidophyllum)
leatherwood (Dirca palustris)
leatherwood, eastern (Dirca palustris)
leavenworthia (Leavenworthia uniflora)
leek, wild (Allium tricoccum)
lemon basil (Ocimum basilicum)
lemon beebalm (Monarda citriodora)
lemon mint (Monarda citriodora)
lemonyellow false goldenaster (Heterotheca camporum var. camporum)
lemonyellow false goldenaster (Heterotheca camporum var. glandulissima)
lens-podded hoary cress (Lepidium chalepense)
lenspod whitetop (Lepidium chalepense)
lentil vetch (Vicia tetrasperma)
lespedeza, Chinese (Lespedeza cuneata)
lespedeza, common (Kummerowia striata)
lespedeza, hairy (Lespedeza hirta)
lespedeza, Japanese (Kummerowia striata)
lespedeza, Korean (Kummerowia stipulacea)
lespedeza, roundhead (Lespedeza capitata)
lespedeza, sericea (Lespedeza cuneata)
lespedeza, shrub (Lespedeza bicolor)
lespedeza, shrubby (Lespedeza bicolor)
lespedeza, slender (Lespedeza virginica)
lespedeza, trailing (Lespedeza procumbens)
lesser burdock (Arctium minus)
lesser clearweed (Pilea fontana)
lesser swinecress (Lepidium didymum)
lettuce, Canada (Lactuca canadensis)
lettuce, Florida (Lactuca floridana)
lettuce, great white (Nabalus crepidineus)
lettuce, lamb's (Valerianella locusta)
lettuce, lamb's (Valerianella radiata)
lettuce, prickly (Lactuca serriola)
lettuce, rough white (Nabalus asper)
lettuce, tall white (Nabalus altissimus)
lettuce, wild (Lactuca canadensis)
lettuce, willow-leaved (Lactuca saligna)
lettuce, willowleaf (Lactuca saligna)
lettuce, woodland (Lactuca floridana)
Lewiston cornsalad (Valerianella locusta)
lice, beggar's (Hackelia virginiana)
lice, harvest (Agrimonia parviflora)
lice, nits and (Hypericum drummondii)
licorice bedstraw (Galium boreale)
licorice bedstraw (Galium circaezans)
licorice-root, Canadian (Ligusticum canadense)
light poppymallow (Callirhoe alcaeoides)
lilac, common (Syringa vulgaris)
lilac, summer (Buddleja davidii)
lily of the valley (Convallaria majalis)
lily twayblade (Liparis liliifolia)
lily, blackberry (Belamcanda chinensis)
lily, fragrant water (Nymphaea odorata)
lily, lotus (Nelumbo lutea)
lily, Michigan (Lilium michiganense)
lily, orange day (Hemerocallis fulva)
lily, sand (Mentzelia nuda)
lily, spider (Hymenocallis caroliniana)
lily, Turk's cap (Lilium michiganense)
lily, white fawn (Erythronium albidum)
lily, white trout (Erythronium albidum)
lily, white trout (Erythronium mesochoreum)
lily, white water (Nymphaea odorata)
lily, yellow pond (Nuphar advena)
lily, yellow trout (Erythronium americanum)
lily, yellow water (Nuphar advena)
limestone bittercress (Cardamine douglassii)
limestone calamint (Clinopodium arkansanum)
limestone meadow sedge (Carex granularis)
limestone ruellia (Ruellia strepens)
limestone wild petunia (Ruellia strepens)
lionsheart, Virginia (Physostegia virginiana)
lipfern, slender (Cheilanthes feei)
little barley (Hordeum pusillum)
little hogweed (Portulaca oleracea)
little ladies' tresses (Spiranthes tuberosa)
little lady's tresses (Spiranthes tuberosa)
littleleaf buttercup (Ranunculus abortivus)
littlepod false flax (Camelina microcarpa)
live-forever (Sedum erythrostictum)
liverleaf, round-lobed (Hepatica americana)
liverleaf, sharp-lobed (Hepatica acutiloba)
lizard's tail (Saururus cernuus)
lobelia, big blue (Lobelia puberula)
lobelia, blue (Lobelia siphilitica)
lobelia, blue (Lobelia siphilitica)
lobelia, downy (Lobelia puberula)
lobelia, great blue (Lobelia siphilitica)
lobelia, great blue (Lobelia siphilitica)
lobelia, inflated (Lobelia inflata)
lobelia, palespike (Lobelia spicata)
lobelia, spiked (Lobelia spicata)
locust, black (Robinia pseudoacacia)
locust, bristly (Robinia hispida)
locust, water (Gleditsia aquatica)
long-bracted wild indigo (Baptisia bracteata)
long-fruited knotweed (Polygonum ramosissimum ssp. ramosissimum)
long-leaved bluets (Houstonia longifolia)
longbract wild indigo (Baptisia bracteata)
longflower beeblossom (Oenothera filiformis)
longhead prairie coneflower (Ratibida columnifera)
longleaf groundcherry (Physalis longifolia)
longleaf phlox (Phlox amplifolia)
longleaf summer bluet (Houstonia longifolia)
longleaf tick clover (Desmodium cuspidatum)
longroot smartweed (Persicaria amphibia var. emersa)
longstyle sweetroot (Osmorhiza longistylis)
looking-glass, clasping Venus' (Triodanis perfoliata)
looking-glass, slimpod Venus' (Triodanis leptocarpa)
looking-glass, small Venus' (Triodanis biflora)
loosestrife (Lysimachia lanceolata)
loosestrife, fourflower yellow (Lysimachia quadriflora)
loosestrife, fringed (Lysimachia ciliata)
loosestrife, lanceleaf (Lysimachia lanceolata)
loosestrife, narrow-leaved (Lysimachia quadriflora)
loosestrife, purple (Lythrum salicaria)
loosestrife, small false (Ludwigia microcarpa)
loosestrife, spiked (Lythrum salicaria)
loosestrife, swamp (Decodon verticillatus)
loosestrife, winged (Lythrum alatum)
lopseed, American (Phryma leptostachya)
lotus lily (Nelumbo lutea)
lotus, American (Nelumbo lutea)
lousewort, Canadian (Pedicularis canadensis)
lousewort, common (Pedicularis canadensis)
lousewort, swamp (Pedicularis lanceolata)
lovage (Ligusticum canadense)
love in a puff (Cardiospermum halicacabum)
low calamint (Clinopodium arkansanum)
low spearwort (Ranunculus pusillus)
low tick trefoil (Desmodium rotundifolium)
lowbush blueberry (Vaccinium pallidum)
lowland bladderfern (Cystopteris protrusa)
lowland brittle fern (Cystopteris protrusa)
lowland rotala (Rotala ramosior)
Lucy, Aunt (Ellisia nyctelea)
lyrate rockcress (Arabidopsis lyrata)
lyre-leaved sage (Salvia lyrata)
lyreleaf sage (Salvia lyrata)
lythrum, winged (Lythrum alatum)
mad dog skullcap (Scutellaria lateriflora)
madder, field (Sherardia arvensis)
madder, wild (Galium obtusum)
magnolia, bigleaf (Magnolia macrophylla)
magnolia, star (Magnolia stellata)
maidenbush (Andrachne phyllanthoides)
maidenbush, Missouri (Andrachne phyllanthoides)
maidenhair, common (Adiantum capillus-veneris)
maidenhair, northern (Adiantum pedatum)
maidenstears (Silene latifolia)
maidenstears (Silene vulgaris ssp. vulgaris)
mallow, common (Malva neglecta)
mallow, finger poppy (Callirhoe digitata)
mallow, fringed poppy (Callirhoe digitata)
mallow, hairy rose (Hibiscus lasiocarpos)
mallow, halberd-leaved rose (Hibiscus laevis)
mallow, musk (Malva moschata)
mallow, pale poppy (Callirhoe alcaeoides)
mallow, pink poppy (Callirhoe alcaeoides)
mallow, plains poppy (Callirhoe alcaeoides)
mallow, purple poppy (Callirhoe involucrata)
mallow, rose (Hibiscus laevis)
mallow, rose (Hibiscus lasiocarpos)
mallow, Venice (Hibiscus trionum)
man of the earth (Ipomoea pandurata)
man-of-the-earth (Ipomoea pandurata)
mandrake (Podophyllum peltatum)
many-flowered agrimony (Agrimonia parviflora)
manyfruit primrose-willow (Ludwigia polycarpa)
manyray aster (Symphyotrichum anomalum)
maple, red (Acer rubrum)
maple-leaved goosefoot (Chenopodium simplex)
mapleleaf goosefoot (Chenopodium simplex)
marguerite, golden (Cota tinctoria ssp. subtinctoria)
marigold, fetid (Dyssodia papposa)
marigold, few-bracted bur (Bidens discoidea)
marigold, marsh (Caltha palustris)
marigold, nodding bur (Bidens cernua)
marigold, yellow marsh (Caltha palustris)
marsh betony (Stachys pilosa)
marsh cress (Rorippa sessiliflora)
marsh elder (Iva annua)
marsh flatsedge (Cyperus pseudovegetus)
marsh marigold (Caltha palustris)
marsh seedbox (Ludwigia palustris)
marsh yellow cress (Rorippa palustris var. fernaldiana)
marshpepper knotweed (Persicaria hydropiper)
Mary, blue-eyed (Collinsia verna)
Mary, eastern blue-eyed (Collinsia verna)
Mary, Ozarkian blue-eyed (Collinsia violacea)
Mary, spring blue eyed (Collinsia verna)
Mary, violet blue eyed (Collinsia violacea)
Maryland meadowbeauty (Rhexia mariana)
Maryland senna (Senna marilandica)
master, rattlesnake (Manfreda virginica)
master, rattlesnake (Eryngium yuccifolium)
masterwort (Heracleum sphondylium)
mat sandbur (Cenchrus longispinus)
Maximilian sunflower (Helianthus maximiliani)
May apple (Podophyllum peltatum)
May pops (Passiflora incarnata)
mayapple (Podophyllum peltatum)
mayweed, disc (Matricaria discoidea)
mazus (Mazus pumilus)
mazus, Japanese (Mazus pumilus)
Mead's milkweed (Asclepias meadii)
Mead's sedge (Carex meadii)
meadow anemone (Anemone canadensis)
meadow beauty (Rhexia mariana)
meadow evening primrose (Oenothera pilosella)
meadow garlic (Allium canadense)
meadow parsnip (Thaspium barbinode)
meadow phlox (Phlox maculata)
meadow sedge (Carex granularis)
meadow violet (Viola sororia)
meadow-rue, early (Thalictrum dioicum)
meadow-rue, purple (Thalictrum dasycarpum)
meadow-rue, wax-leaved (Thalictrum revolutum)
meadow-rue, waxy (Thalictrum revolutum)
meadow-rue, waxyleaf (Thalictrum revolutum)
meadowbeauty, Maryland (Rhexia mariana)
meadowparsnip, hairyjoint (Thaspium barbinode)
mealy corydalis (Corydalis crystallina)
mealy fumewort (Corydalis crystallina)
mealycup sage (Salvia farinacea)
mecardonia (Mecardonia acuminata)
medick, black (Medicago lupulina)
melilot, yellow (Melilotus officinalis)
mercury, common threeseed (Acalypha rhomboidea)
mercury, Deam's threeseed (Acalypha deamii)
mercury, large-seeded (Acalypha deamii)
mercury, one-seeded (Acalypha monococca)
mercury, pineland threeseed (Acalypha ostryifolia)
mercury, slender three-seeded (Acalypha gracilens)
mercury, slender threeseed (Acalypha gracilens)
mercury, slender threeseed (Acalypha monococca)
mercury, three-seeded (Acalypha rhomboidea)
mercury, two-seeded (Acalypha deamii)
mercury, Virginia threeseed (Acalypha virginica)
mermaid, false (Floerkea proserpinacoides)
mermaidweed, false (Floerkea proserpinacoides)
Mexican aster (Cosmos bipinnatus)
Mexican bamboo (Fallopia japonica)
Mexican hat (Ratibida columnifera)
Mexican prickly poppy (Argemone mexicana)
Mexican pricklypoppy (Argemone mexicana)
Mexican tea (Chenopodium ambrosioides)
Miami mist (Phacelia purshii)
Michaux's croton (Croton willdenowii)
Michaux's gladecress (Leavenworthia uniflora)
Michaux's stitchwort (Sabulina michauxii)
Michigan lily (Lilium michiganense)
midland fawnlily (Erythronium mesochoreum)
midwestern arrowhead (Sagittaria brevirostra)
midwestern gerardia (Agalinis skinneriana)
midwestern Indian physic (Gillenia stipulata)
mild water pepper (Persicaria hydropiperoides)
milfoil, common (Achillea millefolium)
milk purslane (Euphorbia maculata)
milk spurge (Euphorbia prostrata)
milkpea, eastern (Galactia regularis)
milkvetch, Canadian (Astragalus canadensis)
milkvetch, groundplum (Astragalus crassicarpus var. trichocalyx)
milkvetch, Ozark (Astragalus distortus)
milkvine, angularfruit (Gonolobus suberosus)
milkvine, Baldwin's (Matelea baldwyniana)
milkvine, oldfield (Matelea decipiens)
milkweed, aquatic (Asclepias perennis)
milkweed, bluntleaf (Asclepias amplexicaulis)
milkweed, butterfly (Asclepias tuberosa)
milkweed, clasping (Asclepias amplexicaulis)
milkweed, climbing (Matelea decipiens)
milkweed, climbing (Cynanchum laeve)
milkweed, climbing (Matelea baldwyniana)
milkweed, common (Asclepias syriaca)
milkweed, fourleaf (Asclepias quadrifolia)
milkweed, green (Asclepias viridiflora)
milkweed, green (Asclepias hirtella)
milkweed, green comet (Asclepias viridiflora)
milkweed, green-flowered (Asclepias viridis)
milkweed, horsetail (Asclepias subverticillata)
milkweed, horsetail (Asclepias verticillata)
milkweed, Mead's (Asclepias meadii)
milkweed, narrow-leaved (Asclepias stenophylla)
milkweed, Ozark (Asclepias viridis)
milkweed, poison (Asclepias subverticillata)
milkweed, poke (Asclepias exaltata)
milkweed, prairie (Asclepias sullivantii)
milkweed, prairie (Asclepias hirtella)
milkweed, purple (Asclepias purpurascens)
milkweed, redring (Asclepias variegata)
milkweed, sand (Asclepias amplexicaulis)
milkweed, showy (Asclepias speciosa)
milkweed, slimleaf (Asclepias stenophylla)
milkweed, smooth (Asclepias sullivantii)
milkweed, smoothseed (Asclepias perennis)
milkweed, spider (Asclepias viridis)
milkweed, swamp (Asclepias incarnata)
milkweed, tall green (Asclepias hirtella)
milkweed, variegated (Asclepias variegata)
milkweed, white (Asclepias perennis)
milkweed, whorled (Asclepias quadrifolia)
milkweed, whorled (Asclepias verticillata)
milkwort, field (Polygala sanguinea)
milkwort, pink (Polygala incarnata)
milkwort, purple (Polygala sanguinea)
milkwort, slender (Polygala incarnata)
milkwort, whorled (Polygala verticillata)
millet, Indian (Echinochloa crus-galli)
millet, Japanese (Echinochloa crus-galli)
mimosa (Albizia julibrissin)
mimosa, prairie (Desmanthus illinoensis)
miniature pansy (Viola tricolor)
mint, corn (Mentha canadensis)
mint, hairy mountain (Pycnanthemum pilosum)
mint, lemon (Monarda citriodora)
mint, Ohio horse (Blephilia ciliata)
mint, slender mountain (Pycnanthemum tenuifolium)
mint, white mountain (Pycnanthemum albescens)
mint, wild (Mentha canadensis)
mint, wood (Blephilia hirsuta)
Mississippi arrowhead (Sagittaria calycina)
Mississippi buttercup (Ranunculus laxicaulis)
Mississippi spangletop (Leptochloa panicea)
Mississippi Valley flat-topped goldenrod (Euthamia leptocephala)
Missouri coneflower (Rudbeckia missouriensis)
Missouri currant (Ribes odoratum)
Missouri evening primrose (Oenothera macrocarpa ssp. macrocarpa)
Missouri gooseberry (Ribes missouriense)
Missouri gourd (Cucurbita foetidissima)
Missouri ironweed (Vernonia missurica)
Missouri maidenbush (Andrachne phyllanthoides)
Missouri orange coneflower (Rudbeckia missouriensis)
Missouri primrose (Oenothera macrocarpa ssp. macrocarpa)
Missouri rock cress (Boechera missouriensis)
Missouri violet (Viola missouriensis)
mist, Miami (Phacelia purshii)
mist-flower (Conoclinium coelestinum)
mistflower, blue (Conoclinium coelestinum)
mistletoe, American Christmas (Phoradendron leucarpum)
mistletoe, eastern (Phoradendron leucarpum)
mistletoe, oak (Phoradendron leucarpum)
miterwort (Mitella diphylla)
miterwort (Mitreola petiolata)
miterwort, twoleaf (Mitella diphylla)
mock pennyroyal (Hedeoma hispida)
mockernut hickory (Carya tomentosa)
moneywort (Lysimachia nummularia)
monkeyflower, Allegheny (Mimulus ringens)
monkeyflower, sharpwing (Mimulus alatus)
moonseed (Menispermum canadense)
moonseed, Carolina (Cocculus carolinus)
moonseed, common (Menispermum canadense)
morning-glory, ivyleaf (Ipomoea hederacea)
morning-glory, shaggy dwarf (Evolvulus nuttallianus)
morning-glory, tall (Ipomoea purpurea)
moss phlox (Phlox subulata)
moss pink (Phlox subulata)
moss rose (Portulaca grandiflora)
moss, rose (Portulaca grandiflora)
moth mullein (Verbascum blattaria)
moth mullein (Verbascum blattaria)
motherwort (Leonurus cardiaca)
motherwort, common (Leonurus cardiaca)
mountain deathcamas (Zigadenus elegans)
mountain houstonia (Houstonia purpurea)
mountain, fire on the (Euphorbia cyathophora)
mountain, snow on the (Euphorbia marginata)
mountainmint, narrowleaf (Pycnanthemum tenuifolium)
mountainmint, whiteleaf (Pycnanthemum albescens)
mountainmint, whorled (Pycnanthemum pilosum)
mouse-ear cress (Arabidopsis thaliana)
mouseear cress (Arabidopsis thaliana)
mousetail (Myosurus minimus)
mousetail, tiny (Myosurus minimus)
mouth, green adder's (Malaxis unifolia)
mouth, snake (Pogonia ophioglossoides)
mucronate sprangletop (Leptochloa panicea)
mud plantain (Heteranthera limosa)
mud plantain (Heteranthera multiflora)
mudbabies (Helanthium tenellum)
mudplantain, blue (Heteranthera limosa)
mudplantain, bouquet (Heteranthera multiflora)
mudplantain, grassleaf (Heteranthera dubia)
mudplantain, roundleaf (Heteranthera rotundifolia)
mulberry weed (Fatoua villosa)
mulberry, French (Callicarpa americana)
mullein (Verbascum thapsus)
mullein foxglove (Dasistoma macrophyllum)
mullein, common (Verbascum thapsus)
mullein, moth (Verbascum blattaria)
mullein, moth (Verbascum blattaria)
mullein-pink (Lychnis coronaria)
multiflora rose (Rosa multiflora)
musk mallow (Malva moschata)
musk thistle (Carduus nutans)
mustard, black (Brassica nigra)
mustard, blue (Chorispora tenella)
mustard, dog (Erucastrum gallicum)
mustard, garlic (Alliaria petiolata)
mustard, Jim Hill (Sisymbrium altissimum)
mustard, small tumbleweed (Sisymbrium loeselii)
mustard, tall hedge (Sisymbrium loeselii)
mustard, tansy (Descurainia pinnata)
mustard, tansy (Descurainia sophia)
mustard, treacle (Erysimum repandum)
mustard, tumble (Sisymbrium altissimum)
myrtle (Vinca minor)
nailwort, hairy (Paronychia fastigiata)
nailwort, hairy forked (Paronychia fastigiata)
naked tick trefoil (Hylodesmum nudiflorum)
naked-stemmed sunflower (Helianthus occidentalis)
naked-stemmed tick clover (Hylodesmum nudiflorum)
nakedflower ticktrefoil (Hylodesmum nudiflorum)
narcissus, poet's (Narcissus poeticus)
narrow-leaved bluets (Houstonia nigricans)
narrow-leaved common vetch (Vicia sativa)
narrow-leaved crab apple (Malus angustifolia)
narrow-leaved dock (Rumex stenophyllus)
narrow-leaved loosestrife (Lysimachia quadriflora)
narrow-leaved milkweed (Asclepias stenophylla)
narrow-leaved puccoon (Lithospermum incisum)
narrow-leaved vervain (Verbena simplex)
narrowleaf bluecurls (Trichostema setaceum)
narrowleaf dock (Rumex stenophyllus)
narrowleaf evening primrose (Oenothera fruticosa)
narrowleaf gumweed (Grindelia lanceolata)
narrowleaf mountainmint (Pycnanthemum tenuifolium)
narrowleaf paleseed (Leucospora multifida)
narrowleaf plantain (Plantago lanceolata)
narrowleaf stoneseed (Lithospermum incisum)
narrowleaf vervain (Verbena simplex)
Navajo tea (Thelesperma megapotamicum)
neckweed (Veronica peregrina)
needle, pink (Erodium cicutarium)
needles, devil's darning (Clematis virginiana)
needles, Spanish (Palafoxia callosa)
needles, Spanish (Bidens bipinnata)
Nepalese browntop (Microstegium vimineum)
nettle, bull (Solanum carolinense)
nettle, common hemp (Galeopsis tetrahit)
nettle, dead (Lamium purpureum)
nettle, false (Boehmeria cylindrica)
nettle, horse (Solanum carolinense)
nettle, smallspike false (Boehmeria cylindrica)
nettle, white horse (Solanum elaeagnifolium)
nettle, wood (Laportea canadensis)
nettle-leaved vervain (Verbena urticifolia)
New England aster (Symphyotrichum novae-angliae)
New Jersey tea (Ceanothus americanus)
nightshade, American black (Solanum americanum)
nightshade, black (Solanum americanum)
nightshade, broadleaf enchanter's (Circaea canadensis)
nightshade, buffalobur (Solanum rostratum)
nightshade, climbing (Solanum dulcamara)
nightshade, enchanter's (Circaea canadensis)
nightshade, hairy (Solanum sarrachoides)
nightshade, silverleaf (Solanum elaeagnifolium)
nightshade, viscid (Solanum sarrachoides)
nightshade, West Indian (Solanum americanum)
ninebark (Physocarpus opulifolius)
ninebark, common (Physocarpus opulifolius)
nits and lice (Hypericum drummondii)
nodding beggartick (Bidens cernua)
nodding bur marigold (Bidens cernua)
nodding chickweed (Cerastium nutans)
nodding foxtail (Setaria faberi)
nodding ladies' tresses (Spiranthes cernua)
nodding lady's tresses (Spiranthes cernua)
nodding plumeless thistle (Carduus nutans)
nodding pogonia (Triphora trianthophoros)
nodding rattlesnakeroot (Nabalus crepidineus)
nodding spurge (Euphorbia nutans)
nodding thistle (Carduus nutans)
nodding wakerobin (Trillium flexipes)
nondo (Ligusticum canadense)
northern bedstraw (Galium boreale)
northern bitter cress (Cardamine douglassii)
northern catalpa (Catalpa speciosa)
northern dewberry (Rubus flagellaris)
northern fog fruit (Lippia lanceolata)
northern frog fruit (Lippia lanceolata)
northern maidenhair (Adiantum pedatum)
northern maidenhair fern (Adiantum pedatum)
northern slender lady's tresses (Spiranthes lacera)
northern spicebush (Lindera benzoin)
Northern spiderlily (Hymenocallis caroliniana)
northern water plantain (Alisma triviale)
Norwegian cinquefoil (Potentilla norvegica)
nosebleed (Achillea millefolium)
noseburn (Tragia betonicifolia)
noseburn, betonyleaf (Tragia betonicifolia)
noseburn, heartleaf (Tragia cordata)
notchbract waterleaf (Hydrophyllum appendiculatum)
nut rush (Scleria ciliata)
nut sedge (Cyperus lupulinus)
nutgrass, yellow (Cyperus esculentus)
nutrush, fringed (Scleria ciliata)
nutrush, whip (Scleria triglomerata)
nutsedge, yellow (Cyperus esculentus)
Nuttall's prairie parsley (Polytaenia nuttallii)
Nuttall's sensitive-briar (Mimosa quadrivalvis var. nuttallii)
nyctelea (Ellisia nyctelea)
o'clock, heartleaf four (Mirabilis nyctaginea)
oak mistletoe (Phoradendron leucarpum)
oak, Atlantic poison (Toxicodendron pubescens)
oak, eastern poison (Toxicodendron pubescens)
oak, overcup (Quercus lyrata)
oakleaf hydrangea (Hydrangea quercifolia)
oatgrass, poverty (Danthonia spicata)
oats, inland sea (Chasmanthium latifolium)
oats, river (Chasmanthium latifolium)
oats, wild (Chasmanthium latifolium)
obedient plant (Physostegia virginiana)
Obi-Wan-Conobea (Leucospora multifida)
oblong-leaved aster (Symphyotrichum oblongifolium)
oceanblue phacelia (Phacelia ranunculacea)
October lady's tresses (Spiranthes ovalis)
Ohio buckeye (Aesculus glabra)
Ohio horse mint (Blephilia ciliata)
Ohio, pride of (Primula meadia)
old man's beard (Chionanthus virginicus)
old-field balsam (Pseudognaphalium obtusifolium)
old-field cinquefoil (Potentilla simplex)
old-field goldenrod (Solidago nemoralis)
old-field toadflax (Nuttallanthus canadensis)
old-man-in-the-Spring (Senecio vulgaris)
oldfield milkvine (Matelea decipiens)
olive, autumn (Elaeagnus umbellata)
one-flowered cancer-root (Orobanche uniflora)
one-seeded croton (Croton monanthogynus)
one-seeded mercury (Acalypha monococca)
oneflower false fiddleleaf (Hydrolea uniflora)
oneflowered broomrape (Orobanche uniflora)
oneseed bur cucumber (Sicyos angulatus)
onion (Allium cepa)
onion, autumn (Allium stellatum)
onion, garden (Allium cepa)
onion, pink wild (Allium stellatum)
onion, wild (Allium canadense)
onion, wild (Allium stellatum)
Ontario blazing star (Liatris cylindracea)
oppositeleaf spotflower (Acmella repens)
orange coneflower (Rudbeckia fulgida)
orange day lily (Hemerocallis fulva)
orange daylily (Hemerocallis fulva)
orange dwarf dandelion (Krigia biflora)
orange eye (Buddleja davidii)
orange eye butterflybush (Buddleja davidii)
orange grass (Hypericum gentianoides)
orange puccoon (Lithospermum canescens)
orange, hoary mock (Philadelphus pubescens)
orangefruit horse-gentian (Triosteum aurantiacum)
orangegrass (Hypericum gentianoides)
orchard grass (Dactylis glomerata)
orchardgrass (Dactylis glomerata)
orchid, Adam and Eve (Aplectrum hyemale)
orchid, brown widelip (Liparis liliifolia)
orchid, cranefly (Tipularia discolor)
orchid, green adder's-mouth (Malaxis unifolia)
orchid, green fringed (Platanthera lacera)
orchid, pale green (Platanthera flava)
orchid, palegreen (Platanthera flava)
orchid, purple fringeless (Platanthera peramoena)
orchid, ragged (Platanthera lacera)
orchid, showy (Galearis spectabilis)
orchid, snakemouth (Pogonia ophioglossoides)
orchid, three bird (Triphora trianthophoros)
orchid, tubercled (Platanthera flava)
orchid, yellow fringed (Platanthera ciliaris)
orchid, yellow lady's slipper (Cypripedium calceolus)
orchis, ragged (Platanthera lacera)
orchis, showy (Galearis spectabilis)
Oriental bittersweet (Celastrus orbiculatus)
Oriental lady's thumb (Persicaria longiseta)
Oswego tea (Monarda didyma)
oval ladies' tresses (Spiranthes ovalis)
overcup oak (Quercus lyrata)
ox-eye (Heliopsis helianthoides)
ox-eye daisy (Leucanthemum vulgare)
oxalis, common yellow (Oxalis stricta)
oxeye daisy (Leucanthemum vulgare)
oxeye, smooth (Heliopsis helianthoides)
Ozark bluestar (Amsonia illustris)
Ozark goldenrod (Solidago drummondii)
Ozark milk vetch (Astragalus distortus)
Ozark milkvetch (Astragalus distortus)
Ozark milkweed (Asclepias viridis)
Ozark mock bishop's weed (Ptilimnium nuttallii)
Ozark spiderwort (Tradescantia ozarkana)
Ozark witch-hazel (Hamamelis vernalis)
Ozark witchhazel (Hamamelis vernalis)
Ozarkian blue-eyed Mary (Collinsia violacea)
pagoda-plant, downy (Blephilia ciliata)
pagoda-plant, hairy (Blephilia hirsuta)
paintbrush, Indian (Castilleja coccinea)
paintbrush, scarlet Indian (Castilleja coccinea)
painted cup (Castilleja coccinea)
painted leaf (Euphorbia cyathophora)
paintedcup, downy (Castilleja sessiliflora)
palafox, small (Palafoxia callosa)
pale avens (Geum virginianum)
pale beard-tongue (Penstemon pallidus)
pale beardtongue (Penstemon pallidus)
pale corydalis (Corydalis flavula)
pale dock (Rumex altissimus)
pale dogwood (Cornus amomum)
pale gerardia (Agalinis skinneriana)
pale green orchid (Platanthera flava)
pale Indian plantain (Arnoglossum atriplicifolium)
pale leather flower (Clematis versicolor)
pale poppy mallow (Callirhoe alcaeoides)
pale purple coneflower (Echinacea pallida)
pale purple coneflower (Echinacea simulata)
pale smartweed (Persicaria lapathifolia)
pale touch-me-not (Impatiens pallida)
pale vetch (Vicia caroliniana)
pale violet (Viola striata)
pale-flowered leaf cup (Polymnia canadensis)
pale-leaved sunflower (Helianthus strumosus)
pale-seeded plantain (Plantago virginica)
palegreen orchid (Platanthera flava)
paleleaf woodland sunflower (Helianthus strumosus)
paleseed, narrowleaf (Leucospora multifida)
palespike lobelia (Lobelia spicata)
paleyellow iris (Iris pseudacorus)
panic grass (Panicum boscii)
panic grass (Panicum scoparium)
panic grass (Panicum sphaerocarpon)
panicgrass, Bosc's (Panicum boscii)
panicgrass, roundseed (Panicum sphaerocarpon)
panicled aster (Symphyotrichum lanceolatum)
panicledleaf ticktrefoil (Desmodium paniculatum)
panicum, velvet (Panicum scoparium)
pansy violet (Viola pedata)
pansy, European field (Viola arvensis)
pansy, field (Viola bicolor)
pansy, miniature (Viola tricolor)
pansy, wild (Viola bicolor)
pansy, wild (Viola arvensis)
paradox cinquefoil (Potentilla supina)
parilla, yellow (Menispermum canadense)
Parlin's pussytoes (Antennaria parlinii)
Parnassus, largeleaf grass of (Parnassia grandifolia)
parsley piert (Aphanes australis)
parsley, hairy (Lomatium foeniculaceum)
parsley, Nuttall's prairie (Polytaenia nuttallii)
parsley, prairie (Polytaenia nuttallii)
parsley, water (Sium suave)
parsley, wild (Lomatium foeniculaceum)
parsnip (Pastinaca sativa)
parsnip, common meadow (Zizia aurea)
parsnip, cow (Heracleum sphondylium)
parsnip, meadow (Thaspium barbinode)
parsnip, water (Sium suave)
parsnip, wild (Pastinaca sativa)
partridge berry (Mitchella repens)
partridge pea (Chamaecrista fasciculata)
partridge-pea, showy (Chamaecrista fasciculata)
partridge-pea, small-flowered (Chamaecrista nictitans)
partridgeberry (Mitchella repens)
paspalum, field (Paspalum laeve)
passion flower (Passiflora incarnata)
passionflower, purple (Passiflora incarnata)
passionflower, yellow (Passiflora lutea)
pasture heliotrope (Heliotropium tenellum)
pasture rose (Rosa carolina)
Patagonian plantain (Plantago patagonica)
pawpaw (Asimina triloba)
pea, butterfly (Clitoria mariana)
pea, Caley (Lathyrus hirsutus)
pea, downy milk (Galactia regularis)
pea, everlasting (Lathyrus latifolius)
pea, gray scurf (Pediomelum tenuiflorum)
pea, hoary (Tephrosia virginiana)
pea, partridge (Chamaecrista fasciculata)
pea, perennial (Lathyrus latifolius)
pea, perennial sweet (Lathyrus latifolius)
pea, sensitive (Chamaecrista nictitans)
pea, sensitive partridge (Chamaecrista nictitans)
pea, singletary (Lathyrus hirsutus)
pea, veiny (Lathyrus venosus)
peach-leaved dock (Rumex altissimus)
peanut, hog (Amphicarpaea bracteata)
pear, Bradford (Pyrus calleryana)
pear, Callery (Pyrus calleryana)
pear, eastern prickly (Opuntia cespitosa)
pearl barley (Hordeum vulgare)
pearlwort, trailing (Sagina decumbens)
pearly everlasting (Anaphalis margaritacea)
pellitory (Parietaria pensylvanica)
pellitory, Pennsylvania (Parietaria pensylvanica)
pencil flower (Stylosanthes biflora)
pencilflower, sidebeak (Stylosanthes biflora)
Pennsylvania bittercress (Cardamine pensylvanica)
Pennsylvania pellitory (Parietaria pensylvanica)
Pennsylvania smartweed (Persicaria bicornis)
Pennsylvania smartweed (Persicaria pensylvanica)
penny cress (Microthlaspi perfoliatum)
pennycress, claspleaf (Microthlaspi perfoliatum)
pennycress, field (Thlaspi arvense)
pennycress, roadside (Thlaspi alliaceum)
pennyroyal (Hedeoma pulegioides)
pennyroyal, American false (Hedeoma pulegioides)
pennyroyal, bastard (Trichostema dichotomum)
pennyroyal, false (Trichostema brachiatum)
pennyroyal, mock (Hedeoma hispida)
pennyroyal, rough false (Hedeoma hispida)
pennywort (Obolaria virginica)
pennywort, Virginia (Obolaria virginica)
penstemon, cobaea (Penstemon cobaea)
pepper and salt (Erigenia bulbosa)
pepper grass (Lepidium virginicum)
pepper vine (Ampelopsis arborea)
pepper, mild water (Persicaria hydropiperoides)
pepper, water (Persicaria hydropiper)
pepper, wild water (Persicaria hydropiperoides)
peppermint (Mentha piperita)
peppervine (Ampelopsis arborea)
peppervine, heartleaf (Ampelopsis cordata)
pepperweed, field (Lepidium campestre)
pepperweed, stinking (Lepidium oblongum)
pepperweed, veiny (Lepidium oblongum)
pepperweed, Virginia (Lepidium virginicum)
perennial pea (Lathyrus latifolius)
perennial phlox (Phlox paniculata)
perennial rye grass (Lolium perenne)
perennial ryegrass (Lolium perenne)
perennial sow thistle (Sonchus arvensis)
perennial sweet pea (Lathyrus latifolius)
perfoliate penny cress (Microthlaspi perfoliatum)
periwinkle, bigleaf (Vinca major)
periwinkle, common (Vinca minor)
periwinkle, greater (Vinca major)
Persian clover (Trifolium resupinatum)
persimmon (Diospyros virginiana)
persimmon, common (Diospyros virginiana)
petunia, fringeleaf wild (Ruellia humilis)
petunia, limestone wild (Ruellia strepens)
petunia, stalked wild (Ruellia pedunculata)
petunia, wild (Ruellia humilis)
petunia, wild (Ruellia pedunculata)
petunia, wild (Ruellia strepens)
phacelia (Phacelia gilioides)
phacelia (Phacelia hirsuta)
phacelia (Phacelia ranunculacea)
phacelia, Brand's (Phacelia gilioides)
phacelia, fernleaf (Phacelia bipinnatifida)
phacelia, forest (Phacelia bipinnatifida)
phacelia, fuzzy (Phacelia hirsuta)
phacelia, oceanblue (Phacelia ranunculacea)
pheasant's eye (Narcissus poeticus)
Philadelphia fleabane (Erigeron philadelphicus)
phlox, blue (Phlox divaricata)
phlox, broadleaf (Phlox amplifolia)
phlox, cleft (Phlox bifida)
phlox, downy (Phlox pilosa)
phlox, fall (Phlox paniculata)
phlox, garden (Phlox paniculata)
phlox, largeleaf (Phlox amplifolia)
phlox, longleaf (Phlox amplifolia)
phlox, meadow (Phlox maculata)
phlox, moss (Phlox subulata)
phlox, perennial (Phlox paniculata)
phlox, prairie (Phlox pilosa)
phlox, sand (Phlox bifida)
phlox, smooth (Phlox glaberrima)
phlox, summer (Phlox paniculata)
phlox, sweet William (Phlox maculata)
phlox, thickleaf (Phlox carolina angusta)
phlox, thickleaf (Phlox carolina carolina)
phlox, wild blue (Phlox divaricata)
phlox, wild blue (Phlox divaricata f candida)
physic, midwestern Indian (Gillenia stipulata)
pickerel weed (Pontederia cordata)
pickerelweed (Pontederia cordata)
Pickering's dawnflower (Stylisma pickeringii)
piedmont bedstraw (Galium pedemontanum)
piedmont staggerbush (Lyonia mariana)
piert, parsley (Aphanes australis)
piert, slender parsley (Aphanes australis)
pigeonwings, Atlantic (Clitoria mariana)
pigweed (Chenopodium album)
pigweed, prostrate (Amaranthus albus)
pigweed, slender (Amaranthus hybridus)
pigweed, spiny (Amaranthus spinosus)
pigweed, winged (Cycloloma atriplicifolium)
pimpernel, false (Lindernia dubia)
pimpernel, scarlet (Anagallis arvensis)
pimpernel, water (Samolus parviflorus)
pimpernel, yellow (Taenidia integerrima)
pimpernel, yellowseed false (Lindernia dubia)
pin clover (Erodium cicutarium)
pine, round-branched ground (Lycopodium dendroideum)
pineapple weed (Matricaria discoidea)
pineland threeseed mercury (Acalypha ostryifolia)
pinesap (Monotropa hypopitys)
pineweed (Hypericum gentianoides)
pink fuzzybean (Strophostyles umbellata)
pink milkwort (Polygala incarnata)
pink needle (Erodium cicutarium)
pink poppy mallow (Callirhoe alcaeoides)
pink queen (Cleome hassleriana)
pink smartweed (Persicaria bicornis)
pink thoroughwort (Fleischmannia incarnata)
pink turtlehead (Chelone obliqua)
pink wild onion (Allium stellatum)
pink, Deptford (Dianthus armeria)
pink, fire (Silene virginica)
pink, grass (Calopogon tuberosus)
pink, Indian (Spigelia marilandica)
pink, moss (Phlox subulata)
pink, rock (Phemeranthus calycinus)
pink, rock (Phemeranthus parviflorus)
pink, rock (Phlox subulata)
pink, Wherry's (Silene caroliniana)
pink, wild (Silene caroliniana)
pink-flowered dogbane (Apocynum androsaemifolium)
pinkladies (Oenothera speciosa)
pinkroot, woodland (Spigelia marilandica)
pinkweed (Persicaria pensylvanica)
pinnate prairie coneflower (Ratibida pinnata)
pinweed, hairy (Lechea mucronata)
pipe, Dutchman's (Isotrema tomentosa)
pipe, Indian (Monotropa uniflora)
pipe, woolly dutchman's (Isotrema tomentosa)
pipevine, woolly (Isotrema tomentosa)
Pitcher's stitchwort (Mononeuria patula)
pitcher's stitchwort (Mononeuria patula)
plainleaf pussytoes (Antennaria parlinii)
plains coreopsis (Coreopsis tinctoria)
plains poppy mallow (Callirhoe alcaeoides)
Plains puccoon (Lithospermum caroliniense)
plains snakecotton (Froelichia floridana)
Plains stoneseed (Lithospermum incisum)
plains wild indigo (Baptisia bracteata)
plant, beefsteak (Perilla frutescens)
plant, castor oil (Ricinus communis)
plant, cellophane (Echinodorus berteroi var. berteroi)
plant, compass (Silphium laciniatum)
plant, cup (Silphium perfoliatum)
plant, flannel (Verbascum thapsus)
plant, lead (Amorpha canescens)
plant, obedient (Physostegia virginiana)
plant, Rocky Mountain bee (Cleome serrulata)
plant, salt-and-pepper (Plantago patagonica)
plant, skeleton (Lygodesmia juncea)
plant, snot (Brasenia schreberi)
plant, telegraph (Heterotheca subaxillaris)
plantain, blackseed (Plantago rugelii)
plantain, bracted (Plantago aristata)
plantain, broad-leaved (Plantago rugelii)
plantain, downy rattlesnake (Goodyera pubescens)
plantain, English (Plantago lanceolata)
plantain, false Indian (Hasteola suaveolens)
plantain, great Indian (Arnoglossum reniforme)
plantain, groovestem Indian (Arnoglossum plantagineum)
plantain, heartleaf (Plantago cordata)
plantain, hoary (Plantago virginica)
plantain, Indian (Arnoglossum plantagineum)
plantain, largebracted (Plantago aristata)
plantain, mud (Heteranthera limosa)
plantain, mud (Heteranthera multiflora)
plantain, narrowleaf (Plantago lanceolata)
plantain, northern water (Alisma triviale)
plantain, pale Indian (Arnoglossum atriplicifolium)
plantain, pale-seeded (Plantago virginica)
plantain, Patagonian (Plantago patagonica)
plantain, prairie (Plantago elongata)
plantain, Pursh (Plantago patagonica)
plantain, robin's (Erigeron pulchellus)
Plantain, Rugel's (Plantago rugelii)
plantain, slender (Plantago elongata)
plantain, small (Plantago elongata)
plantain, Virginia (Plantago virginica)
plantain, woolly (Plantago patagonica)
plantain, Wright's (Plantago wrightiana)
pleatleaf, prairie (Nemastylis geminiflora)
pleurisy root (Asclepias tuberosa)
pluchea, camphor (Pluchea camphorata)
Plukenet's flatsedge (Cyperus plukenetii)
Plukenet's umbrella sedge (Cyperus plukenetii)
plum, American (Prunus americana)
plum, ground (Astragalus crassicarpus var. trichocalyx)
plum, hortulan (Prunus hortulana)
plum, sugar (Amelanchier arborea)
plum, wild (Prunus americana)
plum, wild goose (Prunus hortulana)
poet's narcissus (Narcissus poeticus)
pogonia, nodding (Triphora trianthophoros)
pogonia, rose (Pogonia ophioglossoides)
pointedleaf ticktrefoil (Hylodesmum glutinosum)
poison hemlock (Conium maculatum)
poison ivy (Toxicodendron radicans)
poison milkweed (Asclepias subverticillata)
poison, crow (Nothoscordum bivalve)
poison, fly (Amianthium muscitoxicum)
poke (Phytolacca americana)
poke milkweed (Asclepias exaltata)
poker, redhot (Kniphofia uvaria)
pokeweed (Phytolacca americana)
pokeweed, American (Phytolacca americana)
polecat bush (Rhus aromatica)
polygala, blood (Polygala sanguinea)
polypody, common (Polypodium virginianum)
polypody, gray (Polypodium polypodioides)
polypody, rock (Polypodium virginianum)
pond dogwood (Cephalanthus occidentalis)
pond-lily, yellow (Nuphar advena)
pony-foot (Dichondra carolinensis)
ponysfoot, Carolina (Dichondra carolinensis)
poor man's pepper grass (Lepidium virginicum)
poor man's weatherglass (Anagallis arvensis)
poorjoe (Diodia teres)
poppy, celandine (Stylophorum diphyllum)
poppy, corn (Papaver rhoeas)
poppy, field (Papaver rhoeas)
poppy, Mexican prickly (Argemone mexicana)
poppy, Shirley (Papaver rhoeas)
poppy, white prickly (Argemone albiflora)
poppy, wood (Stylophorum diphyllum)
poppymallow, light (Callirhoe alcaeoides)
poppymallow, purple (Callirhoe involucrata)
pops, May (Passiflora incarnata)
portulaca (Portulaca grandiflora)
possumwood (Diospyros virginiana)
potato dandelion (Krigia dandelion)
potato dwarfdandelion (Krigia dandelion)
potato, duck (Sagittaria latifolia)
potato, wild (Pediomelum esculentum)
poverty grass (Danthonia spicata)
poverty oatgrass (Danthonia spicata)
powderhorn (Cerastium nutans)
powdery alligator-flag (Thalia dealbata)
powdery thalia (Thalia dealbata)
prairie acacia (Acaciella angustissima)
prairie alum root (Heuchera richardsonii)
prairie aster (Symphyotrichum turbinellum)
prairie blanket flower (Gaillardia aestivalis)
prairie blazing star (Liatris pycnostachya)
prairie blue-eyed grass (Sisyrinchium campestre)
prairie broomweed (Amphiachyris dracunculoides)
prairie buttercup (Ranunculus fascicularis)
prairie chickweed (Cerastium velutinum)
prairie dandelion (Nothocalais cuspidata)
prairie dock (Silphium terebinthinaceum)
prairie dogbane (Apocynum cannabinum)
prairie dogtooth violet (Erythronium mesochoreum)
prairie false dandelion (Nothocalais cuspidata)
prairie false foxglove (Agalinis heterophylla)
prairie fame flower (Phemeranthus parviflorus)
prairie fleabane (Erigeron strigosus)
prairie gaillardia (Gaillardia aestivalis)
prairie gentain (Gentiana puberulenta)
prairie goldenrod (Solidago ptarmicoides)
prairie goldenrod (Solidago speciosa)
prairie ground cherry (Physalis pumila)
prairie groundsel (Packera plattensis)
prairie iris (Nemastylis geminiflora)
prairie larkspur (Delphinium carolinianum)
prairie larkspur (Delphinium carolinianum ssp. virescens)
prairie milkweed (Asclepias sullivantii)
prairie milkweed (Asclepias hirtella)
prairie mimosa (Desmanthus illinoensis)
prairie parsley (Polytaenia nuttallii)
prairie phlox (Phlox pilosa)
prairie plantain (Plantago elongata)
prairie pleatleaf (Nemastylis geminiflora)
prairie ragwort (Packera plattensis)
prairie rooster bill (Primula meadia)
prairie rose (Rosa setigera)
prairie rosinweed (Silphium terebinthinaceum)
prairie snakeroot (Liatris punctata)
prairie snoutbean (Rhynchosia latifolia)
prairie sundrops (Oenothera pilosella)
prairie sunflower (Helianthus pauciflorus)
prairie tea (Croton monanthogynus)
prairie trefoil (Acmispon americanus)
prairie turnip (Pediomelum esculentum)
prairie Venus' looking glass (Triodanis leptocarpa)
prairie, queen of the (Filipendula rubra)
prickly fanpetals (Sida spinosa)
prickly gooseberry (Ribes cynosbati)
prickly lettuce (Lactuca serriola)
prickly sida (Sida spinosa)
prickly sow thistle (Sonchus asper)
pricklypoppy, bluestem (Argemone albiflora)
pricklypoppy, Mexican (Argemone mexicana)
pride of Ohio (Primula meadia)
pride, Venus' (Houstonia purpurea)
primrose, bigfruit evening (Oenothera macrocarpa ssp. macrocarpa)
primrose, Cleland's evening (Oenothera clelandii)
primrose, common evening (Oenothera biennis)
primrose, cut-leaved evening (Oenothera laciniata)
primrose, cutleaf evening (Oenothera laciniata)
primrose, Kunth's evening (Oenothera kunthiana)
primrose, meadow evening (Oenothera pilosella)
primrose, Missouri (Oenothera macrocarpa ssp. macrocarpa)
primrose, Missouri evening (Oenothera macrocarpa ssp. macrocarpa)
primrose, narrowleaf evening (Oenothera fruticosa)
primrose, ragged evening (Oenothera laciniata)
primrose, sand (Oenothera clelandii)
primrose, showy evening (Oenothera speciosa)
primrose, threadleaf evening (Oenothera linifolia)
primrose, white evening (Oenothera speciosa)
primrose-willow, anglestem (Ludwigia leptocarpa)
primrose-willow, floating (Ludwigia peploides)
primrose-willow, manyfruit (Ludwigia polycarpa)
primrose-willow, smallfruit (Ludwigia microcarpa)
primrose-willow, wingleaf (Ludwigia decurrens)
princess tree (Paulownia tomentosa)
princesstree (Paulownia tomentosa)
privet, border (Ligustrum obtusifolium)
procession flower (Polygala incarnata)
prostrate pigweed (Amaranthus albus)
prostrate sandmat (Euphorbia prostrata)
prostrate spurge (Euphorbia maculata)
prostrate tick trefoil (Desmodium rotundifolium)
prostrate ticktrefoil (Desmodium rotundifolium)
prostrate vervain (Verbena bracteata)
puccoon, Carolina (Lithospermum caroliniense)
puccoon, hoary (Lithospermum canescens)
puccoon, narrow-leaved (Lithospermum incisum)
puccoon, orange (Lithospermum canescens)
puccoon, Plains (Lithospermum caroliniense)
puccoon, red (Sanguinaria canadensis)
puccoon, yellow (Lithospermum incisum)
puff, love in a (Cardiospermum halicacabum)
pulpit, Jack in the (Arisaema triphyllum)
pumpkin, field (Cucurbita pepo)
pumpkin, wild (Cucurbita foetidissima)
puncture vine (Tribulus terrestris)
puncturevine (Tribulus terrestris)
purple cliff brake (Pellaea atropurpurea)
purple cliffbrake (Pellaea atropurpurea)
purple coneflower (Echinacea purpurea)
purple cress (Cardamine douglassii)
purple cudweed (Gamochaeta purpurea)
purple daisy (Symphyotrichum patens)
purple deadnettle (Lamium purpureum)
purple dewdrop (Lobelia puberula)
purple false foxglove (Agalinis purpurea)
purple fringeless orchid (Platanthera peramoena)
purple loosestrife (Lythrum salicaria)
purple meadow-rue (Thalictrum dasycarpum)
purple milkweed (Asclepias purpurascens)
purple milkwort (Polygala sanguinea)
purple passionflower (Passiflora incarnata)
purple poppy mallow (Callirhoe involucrata)
purple poppymallow (Callirhoe involucrata)
purple prairie clover (Dalea purpurea var. purpurea)
purple rocket (Iodanthus pinnatifidus)
purple trillium (Trillium recurvatum)
purple wake robin (Trillium recurvatum)
purple wood sorrel (Oxalis violacea)
purple-headed sneezeweed (Helenium flexuosum)
purple-leaved willow herb (Epilobium coloratum)
purplehead sneezeweed (Helenium flexuosum)
purpleleaf willowherb (Epilobium coloratum)
purplerocket (Iodanthus pinnatifidus)
purplestem aster (Symphyotrichum puniceum)
purpletassels (Dalea gattingeri)
purse, shepherd's (Capsella bursa-pastoris)
Pursh plantain (Plantago patagonica)
purslane (Portulaca pilosa)
purslane speedwell (Veronica peregrina)
purslane, common (Portulaca oleracea)
purslane, milk (Euphorbia maculata)
purslane, water (Ludwigia palustris)
purslane, water (Ludwigia polycarpa)
pursley (Portulaca oleracea)
pusley (Portulaca oleracea)
pussytoes, Parlin's (Antennaria parlinii)
pussytoes, plainleaf (Antennaria parlinii)
putty root (Aplectrum hyemale)
Quaker ladies (Houstonia caerulea)
quarter vine (Bignonia capreolata)
quarters, lamb's (Chenopodium album)
Queen Anne's lace (Daucus carota)
queen of the prairie (Filipendula rubra)
queen, pink (Cleome hassleriana)
queendevil (Hieracium gronovii)
quick, kiss me (Portulaca pilosa)
quicksilver weed (Thalictrum dioicum)
quickweed, fringed (Galinsoga quadriradiata)
quince, common flowering (Chaenomeles speciosa)
quince, flowering (Chaenomeles speciosa)
quince, Japanese (Chaenomeles speciosa)
quinine, wild (Parthenium hispidum)
quinine, wild (Parthenium integrifolium)
rabbit's foot clover (Trifolium arvense)
rabbit-tobacco (Pseudognaphalium obtusifolium)
rabbitfoot clover (Trifolium arvense)
raccoon grape (Ampelopsis cordata)
radish (Raphanus sativus)
radish, cultivated (Raphanus sativus)
radish, garden (Raphanus sativus)
radish, wild (Raphanus raphanistrum)
ragged evening primrose (Oenothera laciniata)
ragged orchid (Platanthera lacera)
ragged orchis (Platanthera lacera)
ragweed, annual (Ambrosia artemisiifolia)
ragweed, common (Ambrosia artemisiifolia)
ragweed, Cuman (Ambrosia psilostachya)
ragweed, giant (Ambrosia trifida)
ragweed, great (Ambrosia trifida)
ragweed, lanceleaf (Ambrosia bidentata)
ragweed, southern (Ambrosia bidentata)
ragweed, western (Ambrosia psilostachya)
ragwort, golden (Packera aurea)
ragwort, prairie (Packera plattensis)
ragwort, roundleaf (Packera obovata)
raisin, wild (Viburnum rufidulum)
ramp (Allium tricoccum)
rampion bellflower (Campanula rapunculoides)
rampion, false (Campanula rapunculoides)
rape (Brassica napus)
rapeseed (Brassica napus)
raspberry, black (Rubus occidentalis)
rattlebox (Crotalaria sagittalis)
rattlebox, arrowhead (Crotalaria sagittalis)
rattlebox, showy (Crotalaria spectabilis)
rattlesnake master (Manfreda virginica)
rattlesnake master (Eryngium yuccifolium)
rattlesnake root (Nabalus asper)
rattlesnake root (Nabalus altissimus)
rattlesnake root (Nabalus crepidineus)
rattlesnake weed (Perilla frutescens)
rattlesnakeroot, nodding (Nabalus crepidineus)
rattlesnakeroot, rough (Nabalus asper)
rattlesnakeroot, tall (Nabalus altissimus)
rattleweed (Astragalus canadensis)
red birch (Betula nigra)
red buckeye (Aesculus pavia)
red clover (Trifolium pratense)
red columbine (Aquilegia canadensis)
red iris (Iris fulva)
red maple (Acer rubrum)
red morning glory (Ipomoea coccinea)
red puccoon (Sanguinaria canadensis)
red root (Geum canadense)
red sorrel (Rumex acetosella)
red sprangletop (Leptochloa panicea)
red turtlehead (Chelone obliqua)
red-fruited horse gentian (Triosteum aurantiacum)
red-seeded dandelion (Taraxacum erythrospermum)
red-veined dock (Rumex obtusifolius)
redbud, eastern (Cercis canadensis)
redhot poker (Kniphofia uvaria)
redring milkweed (Asclepias variegata)
redroot (Ceanothus herbaceus)
redstar (Ipomoea coccinea)
redstem stork's bill (Erodium cicutarium)
redstem, valley (Ammannia coccinea)
redvine (Brunnichia ovata)
redwhisker clammyweed (Polanisia dodecandra)
resurrection fern (Polypodium polypodioides)
reversed clover (Trifolium resupinatum)
rhombic copperleaf (Acalypha rhomboidea)
rib grass (Plantago lanceolata)
ribbed mock bishopweed (Ptilimnium costatum)
Richardson's alumroot (Heuchera richardsonii)
richweed (Collinsonia canadensis)
Riddell's goldenrod (Solidago riddellii)
ridged yellow flax (Linum sulcatum)
rigid goldenrod (Solidago rigida)
ringwing, tumble (Cycloloma atriplicifolium)
river birch (Betula nigra)
river oats (Chasmanthium latifolium)
roadside pennycress (Thlaspi alliaceum)
roadside thistle (Cirsium altissimum)
robin's plantain (Erigeron pulchellus)
robin, purple wake (Trillium recurvatum)
robin, wake (Trillium sessile)
robin, white wake (Trillium flexipes)
rock buttercup (Ranunculus micranthus)
rock cress (Boechera dentata)
rock cress (Boechera missouriensis)
rock dandelion (Taraxacum erythrospermum)
rock pink (Phemeranthus calycinus)
rock pink (Phemeranthus parviflorus)
rock pink (Phlox subulata)
rock polypody (Polypodium virginianum)
rock sandwort (Sabulina michauxii)
rockcress, green (Boechera missouriensis)
rockcress, lyrate (Arabidopsis lyrata)
rockcress, Short's (Boechera dentata)
rockcress, smooth (Boechera laevigata)
rockcress, Virginia winged (Planodes virginicum)
rocket larkspur (Delphinium ajacis)
rocket, dame's (Hesperis matronalis)
rocket, dames (Hesperis matronalis)
rocket, garden (Delphinium consolida)
rocket, purple (Iodanthus pinnatifidus)
rocket, violet (Iodanthus pinnatifidus)
rocket, yellow (Barbarea vulgaris)
rocketweed (Erucastrum gallicum)
rockjasmine, western (Androsace occidentalis)
Rocky Mountain bee plant (Cleome serrulata)
Rocky Mountain beeplant (Cleome serrulata)
Rocky Mountain sage (Salvia reflexa)
Roman wormwood (Ambrosia artemisiifolia)
roosters, hens and (Viola pedata)
root, anise (Osmorhiza longistylis)
root, cancer (Kickxia elatine)
root, canker (Kickxia elatine)
root, coral (Corallorhiza wisteriana)
root, Culver's (Veronicastrum virginicum)
root, culver's (Veronicastrum virginicum)
root, pleurisy (Asclepias tuberosa)
root, prairie alum (Heuchera richardsonii)
root, putty (Aplectrum hyemale)
root, rattlesnake (Nabalus asper)
root, rattlesnake (Nabalus altissimus)
root, rattlesnake (Nabalus crepidineus)
root, red (Geum canadense)
rose acacia (Robinia hispida)
rose campion (Lychnis coronaria)
rose mallow (Hibiscus laevis)
rose mallow (Hibiscus lasiocarpos)
rose mock vervain (Glandularia canadensis)
rose moss (Portulaca grandiflora)
rose of Sharon (Hibiscus syriacus)
rose pogonia (Pogonia ophioglossoides)
rose turtlehead (Chelone obliqua)
rose verbena (Glandularia canadensis)
rose vervain (Glandularia canadensis)
rose, Carolina (Rosa carolina)
rose, climbing (Rosa setigera)
rose, Guelder (Viburnum opulus)
rose, Japanese (Rosa multiflora)
rose, Japanese (Rosa rugosa)
rose, moss (Portulaca grandiflora)
rose, multiflora (Rosa multiflora)
rose, pasture (Rosa carolina)
rose, prairie (Rosa setigera)
rose, rugosa (Rosa rugosa)
rose-campion (Lychnis coronaria)
rose-gentian (Sabatia angularis)
rose-gentian (Sabatia angularis)
rose-pink (Sabatia angularis)
rose-pink (Sabatia angularis)
rosemallow (Hibiscus lasiocarpos)
rosemallow, halberdleaf (Hibiscus laevis)
rosepink (Sabatia angularis)
rosepink (Sabatia angularis)
rosinweed (Silphium integrifolium)
rosinweed sunflower (Helianthus silphioides)
rosinweed, cup (Silphium perfoliatum)
rosinweed, prairie (Silphium terebinthinaceum)
rosinweed, starry (Silphium asteriscus)
rosinweed, wholeleaf (Silphium integrifolium)
rosy sedge (Carex rosea)
rotala, lowland (Rotala ramosior)
rough avens (Geum laciniatum)
rough buttonweed (Diodia teres)
rough cinquefoil (Potentilla norvegica)
rough false pennyroyal (Hedeoma hispida)
rough flatsedge (Cyperus retrofractus)
rough gayfeather (Liatris aspera)
rough goldenrod (Solidago radula)
rough jointvetch (Aeschynomene rudis)
rough rattlesnakeroot (Nabalus asper)
rough white lettuce (Nabalus asper)
rough-fruited cinquefoil (Potentilla recta)
rough-leaved dogwood (Cornus drummondii)
rough-leaved goldenrod (Solidago rugosa)
rough-stemmed gerardia (Agalinis gattingeri)
rough-stemmed goldenrod (Solidago rugosa)
roughleaf dogwood (Cornus drummondii)
roughpod copperleaf (Acalypha ostryifolia)
round-branched ground pine (Lycopodium dendroideum)
round-fruited hedge hyssop (Gratiola virginiana)
round-fruited St. John's-wort (Hypericum sphaerocarpum)
round-headed bush clover (Lespedeza capitata)
round-lobed hepatica (Hepatica americana)
round-lobed liverleaf (Hepatica americana)
roundfruit hedgehyssop (Gratiola virginiana)
roundhead lespedeza (Lespedeza capitata)
roundleaf groundsel (Packera obovata)
roundleaf mudplantain (Heteranthera rotundifolia)
roundleaf ragwort (Packera obovata)
roundlobe hepatica (Hepatica americana)
roundseed panicgrass (Panicum sphaerocarpon)
roundseed St. Johnswort (Hypericum sphaerocarpum)
roundstem false foxglove (Agalinis gattingeri)
rover bellflower (Campanula rapunculoides)
royal catchfly (Silene regia)
royal fern (Osmunda regalis)
royal knight's-spur (Delphinium consolida)
royal paulownia empress tree (Paulownia tomentosa)
rue anemone (Thalictrum thalictroides)
rue, goat's (Tephrosia virginiana)
rue-anemone (Thalictrum thalictroides)
ruellia, fringeleaf (Ruellia humilis)
ruellia, limestone (Ruellia strepens)
ruellia, smooth (Ruellia strepens)
rufous bulrush (Scirpus pendulus)
Rugel's Plantain (Plantago rugelii)
rugosa rose (Rosa rugosa)
rum cherry (Prunus serotina)
running ground cedar (Lycopodium digitatum)
rush (Juncus torreyi)
rush skeletonplant (Lygodesmia juncea)
rush, beaked (Rhynchospora globularis)
rush, bog (Juncus effusus)
rush, chairmaker's (Schoenoplectus pungens)
rush, common (Juncus effusus)
rush, common scouring (Equisetum hyemale)
rush, grass-leaved (Juncus marginatus)
rush, grassleaf (Juncus marginatus)
rush, hedgehog club (Cyperus echinatus)
rush, nut (Scleria ciliata)
rush, slimpod (Juncus diffusissimus)
rush, soft (Juncus effusus)
rush, spike (Eleocharis quadrangulata)
rush, Torrey's (Juncus torreyi)
rush, winter scouring (Equisetum hyemale)
rush, wood (Luzula campestris)
rushfoil, common (Croton willdenowii)
Russian sage (Perovskia atriplicifolia)
rustweed (Polypremum procumbens)
rusty blackhaw (Viburnum rufidulum)
rutabaga (Brassica napus)
Rutland beauty (Calystegia sepium)
rye, downy wild (Elymus villosus)
rye, Virginia wild (Elymus virginicus)
ryegrass, perennial (Lolium perenne)
sage, azure blue (Salvia azurea)
sage, blue (Salvia azurea)
sage, lance-leaved (Salvia reflexa)
sage, lanceleaf (Salvia reflexa)
sage, lyre-leaved (Salvia lyrata)
sage, lyreleaf (Salvia lyrata)
sage, mealycup (Salvia farinacea)
sage, Rocky Mountain (Salvia reflexa)
sage, Russian (Perovskia atriplicifolia)
sage, wood (Teucrium canadense)
sagewort, field (Artemisia campestris ssp. caudata)
sagewort, sweet (Artemisia annua)
sagewort, western (Artemisia campestris ssp. caudata)
sailors, blue (Cichorium intybus)
salad, corn (Valerianella locusta)
salad, corn (Valerianella radiata)
sallow sedge (Carex lurida)
salsify, western (Tragopogon dubius)
salsify, yellow (Tragopogon dubius)
salt, pepper and (Erigenia bulbosa)
salt-and-pepper plant (Plantago patagonica)
Sampson's snakeroot (Orbexilum pedunculatum)
sand bittercress (Cardamine parviflora)
sand cress (Arabidopsis lyrata)
sand croton (Croton glandulosus)
sand grape (Vitis rupestris)
sand lily (Mentzelia nuda)
sand milkweed (Asclepias amplexicaulis)
sand phlox (Phlox bifida)
sand primrose (Oenothera clelandii)
sand vine (Cynanchum laeve)
sandbar willow (Salix interior)
sandbur (Cenchrus longispinus)
sandbur, mat (Cenchrus longispinus)
sanddune wallflower (Erysimum capitatum)
sandmat, Geyer's (Euphorbia geyeri)
sandmat, prostrate (Euphorbia prostrata)
sandmat, spreading (Euphorbia humistrata)
sandwort (Mononeuria patula)
sandwort, rock (Sabulina michauxii)
sandwort, thyme-leaved (Arenaria serpyllifolia)
sandwort, thymeleaf (Arenaria serpyllifolia)
sang grass (Brachyelytrum erectum)
sanicle (Sanicula canadensis)
sanicle, southern (Sanicula smallii)
sarviss berry (Amelanchier arborea)
sarviss tree (Amelanchier arborea)
sassafras (Sassafras albidum)
satureja (Clinopodium arkansanum)
saw greenbrier (Smilax bona-nox)
sawtooth blackberry (Rubus argutus)
sawtooth sunflower (Helianthus grosseserratus)
saxifrage (Micranthes texana)
saxifrage, early (Micranthes virginiensis)
saxifrage, Forbes' (Micranthes pensylvanica var. forbesii)
saxifrage, Texas (Micranthes texana)
scaly blazing star (Liatris squarrosa)
scarlet beebalm (Monarda didyma)
scarlet Indian paintbrush (Castilleja coccinea)
scarlet pimpernel (Anagallis arvensis)
scarlet starglory (Ipomoea coccinea)
scorpiongrass, big-seeded (Myosotis macrosperma)
scouringrush horsetail (Equisetum hyemale)
scurfpea, slimflower (Pediomelum tenuiflorum)
seal, false Solomon's (Maianthemum racemosum)
seal, smooth Solomon's (Polygonatum biflorum)
Seal, Solomon's (Polygonatum biflorum)
seaside brookweed (Samolus parviflorus)
sedge, blue (Carex glaucodea)
sedge, bristle-leaved (Carex eburnea)
sedge, bristleleaf (Carex eburnea)
sedge, bur (Carex grayi)
sedge, Cherokee (Carex cherokeensis)
sedge, common wood (Carex blanda)
sedge, eastern woodland (Carex blanda)
sedge, flat-spiked (Carex planispicata)
sedge, Frank's (Carex frankii)
sedge, fringed (Carex crinita)
sedge, fuzzy wuzzy (Carex hirsutella)
sedge, globe (Carex grayi)
sedge, grass (Carex jamesii)
sedge, Gray's (Carex grayi)
sedge, James' (Carex jamesii)
sedge, limestone meadow (Carex granularis)
sedge, Mead's (Carex meadii)
sedge, meadow (Carex granularis)
sedge, nut (Cyperus lupulinus)
sedge, Plukenet's umbrella (Cyperus plukenetii)
sedge, rosy (Carex rosea)
sedge, sallow (Carex lurida)
sedge, shallow (Carex lurida)
sedge, shoreline (Carex hyalinolepis)
sedge, Short's (Carex shortiana)
sedge, stellate (Carex rosea)
sedge, umbrella (Cyperus pseudovegetus)
sedge, umbrella (Cyperus squarrosus)
sedge, white bear (Carex albursina)
sedge, yellow-fruited (Carex annectens)
sedge, yellowfruit (Carex annectens)
seedbox (Ludwigia alternifolia)
seedbox, bushy (Ludwigia alternifolia)
seedbox, marsh (Ludwigia palustris)
selenia (Selenia aurea)
selenia, golden (Selenia aurea)
self-heal (Prunella vulgaris)
selfheal, common (Prunella vulgaris)
Seneca snakeroot (Polygala senega)
senna, coffee (Senna occidentalis)
senna, Maryland (Senna marilandica)
senna, southern wild (Senna marilandica)
sensitive brier (Mimosa quadrivalvis var. nuttallii)
sensitive partridge pea (Chamaecrista nictitans)
sensitive pea (Chamaecrista nictitans)
sensitive-briar, Nuttall's (Mimosa quadrivalvis var. nuttallii)
septicweed (Senna occidentalis)
sericea lespedeza (Lespedeza cuneata)
serviceberry, common (Amelanchier arborea)
serviceberry, downy (Amelanchier arborea)
sesbania, bigpod (Sesbania herbacea)
sessile-flowered cress (Rorippa sessiliflora)
sessileleaf bellwort (Uvularia sessilifolia)
sevenbark (Hydrangea arborescens)
shadblow (Amelanchier arborea)
shadbush, downy (Amelanchier arborea)
shaggy dwarf morning-glory (Evolvulus nuttallianus)
shaggy soldier (Galinsoga quadriradiata)
shallow sedge (Carex lurida)
Sharon, rose of (Hibiscus syriacus)
sharp-lobed hepatica (Hepatica acutiloba)
sharp-lobed liverleaf (Hepatica acutiloba)
sharpleaf cancerwort (Kickxia elatine)
sharplobe hepatica (Hepatica acutiloba)
sharpwing monkey flower (Mimulus alatus)
sharpwing monkeyflower (Mimulus alatus)
sheep sorrel (Rumex acetosella)
shepherd's purse (Capsella bursa-pastoris)
shield, Carolina water (Cabomba caroliniana)
shield, water (Brasenia schreberi)
shining bedstraw (Galium concinnum)
shining blue star (Amsonia illustris)
shining sumac (Rhus copallinum)
Shirley poppy (Papaver rhoeas)
shoelaces, devil's (Campsis radicans)
shoestring smartweed (Persicaria amphibia var. emersa)
shoestrings (Campsis radicans)
shoreline sedge (Carex hyalinolepis)
Short's rockcress (Boechera dentata)
Short's sedge (Carex shortiana)
shortbeak arrowhead (Sagittaria brevirostra)
shorthusk, bearded (Brachyelytrum erectum)
shortpod draba (Draba brachycarpa)
shortstalk false bindweed (Calystegia silvatica)
showy chloris (Chloris virgata)
showy evening primrose (Oenothera speciosa)
showy goldenrod (Solidago speciosa)
showy milkweed (Asclepias speciosa)
showy orchid (Galearis spectabilis)
showy orchis (Galearis spectabilis)
showy partridge-pea (Chamaecrista fasciculata)
showy rattlebox (Crotalaria spectabilis)
showy tick trefoil (Desmodium canadense)
showy ticktrefoil (Desmodium canadense)
shrub lespedeza (Lespedeza bicolor)
shrubby cinquefoil (Potentilla fruticosa)
shrubby lespedeza (Lespedeza bicolor)
shrubby St. John's-wort (Hypericum prolificum)
shrubby St. Johnswort (Hypericum prolificum)
shrubby sundrops (Oenothera fruticosa)
Siberian squill (Scilla siberica)
sicklepod (Boechera canadensis)
sicklepod (Senna obtusifolia)
sida, Elliott's (Sida elliottii)
sida, prickly (Sida spinosa)
sidebeak pencilflower (Stylosanthes biflora)
sideoats grama (Bouteloua curtipendula)
silene, sleepy (Silene antirrhina)
silktree (Albizia julibrissin)
silky aster (Symphyotrichum sericeum)
silky dogwood (Cornus amomum)
silver beardgrass (Bothriochloa laguroides)
silver bluestem (Bothriochloa laguroides)
silver hairgrass (Aira caryophyllea)
silverleaf nightshade (Solanum elaeagnifolium)
single-stemmed bog aster (Eurybia hemispherica)
singletary pea (Lathyrus hirsutus)
skeleton plant (Lygodesmia juncea)
skeletonplant, rush (Lygodesmia juncea)
Skinner's false foxglove (Agalinis skinneriana)
skullcap, blue (Scutellaria lateriflora)
skullcap, Bush's (Scutellaria bushii)
skullcap, downy (Scutellaria incana)
skullcap, egg-leaved (Scutellaria ovata)
skullcap, hairy (Scutellaria elliptica)
skullcap, heart-leaved (Scutellaria ovata)
skullcap, heartleaf (Scutellaria ovata)
skullcap, hoary (Scutellaria incana)
skullcap, mad dog (Scutellaria lateriflora)
skullcap, small (Scutellaria parvula)
skyblue aster (Symphyotrichum oolentangiense)
sleepy catchfly (Silene antirrhina)
sleepy silene (Silene antirrhina)
slender bush clover (Lespedeza virginica)
slender cottonweed (Froelichia gracilis)
slender fimbry (Fimbristylis autumnalis)
slender fumewort (Corydalis micrantha)
slender gerardia (Agalinis tenuifolia)
slender ladies' tresses (Spiranthes lacera)
slender lespedeza (Lespedeza virginica)
slender lip fern (Cheilanthes feei)
slender lipfern (Cheilanthes feei)
slender milkwort (Polygala incarnata)
slender mountain mint (Pycnanthemum tenuifolium)
slender parsley piert (Aphanes australis)
slender pigweed (Amaranthus hybridus)
slender plantain (Plantago elongata)
slender snake-cotton (Froelichia gracilis)
slender snakecotton (Froelichia gracilis)
slender three-seeded mercury (Acalypha gracilens)
slender threeseed mercury (Acalypha gracilens)
slender threeseed mercury (Acalypha monococca)
slender yellow woodsorrel (Oxalis dillenii)
slender-leaved bluets (Houstonia longifolia)
slender-leaved Venus' looking glass (Triodanis leptocarpa)
slenderleaf betony (Stachys tenuifolia)
slenderleaf false foxglove (Agalinis tenuifolia)
slickseed fuzzybean (Strophostyles leiosperma)
slickseed wild bean (Strophostyles leiosperma)
slim amaranth (Amaranthus hybridus)
slimflower scurfpea (Pediomelum tenuiflorum)
slimleaf milkweed (Asclepias stenophylla)
slimpod rush (Juncus diffusissimus)
slimpod Venus' looking-glass (Triodanis leptocarpa)
slipper, yellow lady's (Cypripedium calceolus)
small beggarticks (Bidens discoidea)
small bellwort (Uvularia sessilifolia)
small bindweed (Convolvulus arvensis)
small bluets (Houstonia pusilla)
small cancer-root (Orobanche uniflora)
small crane's bill (Geranium pusillum)
small false loosestrife (Ludwigia microcarpa)
small flower-of-an-hour (Phemeranthus parviflorus)
small geranium (Geranium pusillum)
small palafox (Palafoxia callosa)
small plantain (Plantago elongata)
small skullcap (Scutellaria parvula)
small tumbleweed mustard (Sisymbrium loeselii)
small Venus' looking-glass (Triodanis biflora)
small white morning glory (Ipomoea lacunosa)
small woodland sunflower (Helianthus microcephalus)
Small's blacksnakeroot (Sanicula smallii)
small-flowered bitter cress (Cardamine parviflora)
small-flowered corydalis (Corydalis micrantha)
small-flowered crowfoot (Ranunculus abortivus)
small-flowered crowfoot (Ranunculus parviflorus)
small-flowered hawksbeard (Crepis pulchra)
small-flowered partridge-pea (Chamaecrista nictitans)
small-flowered St. John's- wort (Hypericum mutilum)
small-headed thistle (Cirsium carolinianum)
smallflower buttercup (Ranunculus parviflorus)
smallflower fumewort (Corydalis micrantha)
smallflower hawksbeard (Crepis pulchra)
smallflower morning glory (Jacquemontia tamnifolia)
smallflower thoroughwort (Eupatorium semiserratum)
smallfruit primrose-willow (Ludwigia microcarpa)
smallspike false nettle (Boehmeria cylindrica)
smartweed (Persicaria maculosa)
smartweed (Persicaria longiseta)
smartweed (Persicaria glabra)
smartweed (Persicaria hydropiper)
smartweed, common (Persicaria pensylvanica)
smartweed, longroot (Persicaria amphibia var. emersa)
smartweed, pale (Persicaria lapathifolia)
smartweed, Pennsylvania (Persicaria bicornis)
smartweed, Pennsylvania (Persicaria pensylvanica)
smartweed, pink (Persicaria bicornis)
smartweed, shoestring (Persicaria amphibia var. emersa)
smartweed, swamp (Persicaria amphibia var. emersa)
smartweed, swamp (Persicaria hydropiperoides)
smartweed, water (Persicaria amphibia var. emersa)
smooth alder (Alnus serrulata)
smooth beard-tongue (Penstemon digitalis)
smooth bur clover (Medicago polymorpha)
smooth catchfly (Silene csereii)
smooth false buttonweed (Spermacoce glabra)
smooth false foxglove (Aureolaria flava)
smooth gerardia (Agalinis purpurea)
smooth hedgenettle (Stachys tenuifolia)
smooth hydrangea (Hydrangea arborescens)
smooth milkweed (Asclepias sullivantii)
smooth oxeye (Heliopsis helianthoides)
smooth phlox (Phlox glaberrima)
smooth rock cress (Boechera laevigata)
smooth rockcress (Boechera laevigata)
smooth ruellia (Ruellia strepens)
smooth Solomon's seal (Polygonatum biflorum)
smooth spiderwort (Tradescantia ohiensis)
smooth sumac (Rhus glabra)
smooth sweet cicely (Osmorhiza longistylis)
smooth tick clover (Desmodium laevigatum)
smooth tick trefoil (Desmodium laevigatum)
smooth ticktrefoil (Desmodium laevigatum)
smooth violet prairie aster (Symphyotrichum turbinellum)
smooth yellow false foxglove (Aureolaria flava)
smooth yellow violet (Viola pubescens)
smoothseed milkweed (Asclepias perennis)
snailseed, Carolina (Cocculus carolinus)
snake mouth (Pogonia ophioglossoides)
snake-cotton, field (Froelichia floridana)
snake-cotton, slender (Froelichia gracilis)
snakecotton, plains (Froelichia floridana)
snakecotton, slender (Froelichia gracilis)
snakemouth orchid (Pogonia ophioglossoides)
snakereoot, black (Sanicula canadensis)
snakeroot, black (Sanicula odorata)
snakeroot, black (Sanicula smallii)
snakeroot, black (Actaea racemosa)
snakeroot, broom (Amphiachyris dracunculoides)
snakeroot, button (Liatris pycnostachya)
snakeroot, button (Liatris spicata)
snakeroot, button (Eryngium yuccifolium)
snakeroot, Canada (Sanicula canadensis)
snakeroot, prairie (Liatris punctata)
snakeroot, Sampson's (Orbexilum pedunculatum)
snakeroot, Seneca (Polygala senega)
snakeroot, Virginia (Endodeca serpentaria)
snakeroot, white (Ageratina altissima)
snapdragon, dwarf (Chaenorhinum minus)
snapweed, spotted (Impatiens balsamina)
sneezeweed (Helenium amarum)
sneezeweed, autumn (Helenium autumnale)
sneezeweed, bitter (Helenium amarum)
sneezeweed, common (Helenium autumnale)
sneezeweed, purple-headed (Helenium flexuosum)
sneezeweed, purplehead (Helenium flexuosum)
sneezeweed, southern (Helenium flexuosum)
sneezewort aster (Solidago ptarmicoides)
snot plant (Brasenia schreberi)
snout bean (Rhynchosia latifolia)
snoutbean, prairie (Rhynchosia latifolia)
snow on the mountain (Euphorbia marginata)
snow trillium (Trillium nivale)
snow-on-the-mountain (Euphorbia marginata)
snowball, Japanese (Viburnum plicatum)
snowball, wild (Ceanothus americanus)
snowdrop (Galanthus nivalis)
snowflake (Leucojum aestivum)
snowflake, summer (Leucojum aestivum)
soapweed (Yucca glauca)
soapweed yucca (Yucca glauca)
soapwort (Saponaria officinalis)
soft agrimony (Agrimonia pubescens)
soft goldenaster (Bradburia pilosa)
soft rush (Juncus effusus)
soft thistle (Cirsium carolinianum)
soldier, shaggy (Galinsoga quadriradiata)
Solomon's Seal (Polygonatum biflorum)
sophia, herb (Descurainia sophia)
sorgho (Sorghum bicolor)
sorghum (Sorghum bicolor)
sorrel, common sheep (Rumex acetosella)
sorrel, field (Rumex acetosella)
sorrel, gray-green wood (Oxalis dillenii)
sorrel, heartwing (Rumex hastatulus)
sorrel, purple wood (Oxalis violacea)
sorrel, red (Rumex acetosella)
sorrel, sheep (Rumex acetosella)
sorrel, violet wood (Oxalis violacea)
sorrel, wild (Rumex hastatulus)
sorrel, yellow wood (Oxalis dillenii)
sorrel, yellow wood (Oxalis stricta)
sour dock (Rumex crispus)
sour dock (Rumex acetosella)
sour dock (Rumex hastatulus)
southern arrowwood (Viburnum dentatum)
southern blackhaw (Viburnum rufidulum)
southern blue flag (Iris virginica)
southern blue toadflax (Nuttallanthus texanus)
southern catalpa (Catalpa bignonioides)
southern crab apple (Malus angustifolia)
southern fragile fern (Cystopteris protrusa)
southern gooseberry (Vaccinium stamineum)
southern jointweed (Polygonum americanum)
southern maidenhair fern (Adiantum capillus-veneris)
southern prairie aster (Eurybia hemispherica)
southern ragweed (Ambrosia bidentata)
southern sanicle (Sanicula smallii)
southern sneezeweed (Helenium flexuosum)
southern three-lobed bedstraw (Galium tinctorium)
southern wild senna (Senna marilandica)
southwestern bedstraw (Galium virgatum)
sowthistle, field (Sonchus arvensis)
sowthistle, spiny (Sonchus asper)
spangletop, Mississippi (Leptochloa panicea)
Spanish needles (Palafoxia callosa)
Spanish needles (Bidens bipinnata)
sparkleberry (Vaccinium arboreum)
spatterdock (Nuphar advena)
spearmint (Mentha spicata)
spearwort (Ranunculus laxicaulis)
spearwort, low (Ranunculus pusillus)
speedwell, bird's-eye (Veronica persica)
speedwell, birdeye (Veronica persica)
speedwell, corn (Veronica arvensis)
speedwell, finger (Veronica triphyllos)
speedwell, gray field (Veronica polita)
speedwell, ivy-leaved (Veronica hederifolia)
speedwell, ivyleaf (Veronica hederifolia)
speedwell, purslane (Veronica peregrina)
speedwell, spiked (Veronica spicata)
speedwell, thyme-leaved (Veronica serpyllifolia)
speedwell, thymeleaf (Veronica serpyllifolia)
speedwell, water (Veronica catenata)
speedwell, wayside (Veronica polita)
spice bush (Lindera benzoin)
spicebush, northern (Lindera benzoin)
spider flower (Cleome hassleriana)
spider lily (Hymenocallis caroliniana)
spider milkweed (Asclepias viridis)
spiderlily, Northern (Hymenocallis caroliniana)
spiderwort (Tradescantia ernestiana)
spiderwort, Ernest's (Tradescantia ernestiana)
spiderwort, Ozark (Tradescantia ozarkana)
spiderwort, smooth (Tradescantia ohiensis)
spiderwort, Virginia (Tradescantia virginiana)
spiderwort, wide-leaved (Tradescantia subaspera)
spiderwort, zigzag (Tradescantia subaspera)
spike rush (Eleocharis quadrangulata)
spiked lobelia (Lobelia spicata)
spiked loosestrife (Lythrum salicaria)
spiked speedwell (Veronica spicata)
spikenard, American (Aralia racemosa)
spikenard, false (Maianthemum racemosum)
spikerush, squarestem (Eleocharis quadrangulata)
spindle tree (Euonymus atropurpureus)
spiny amaranth (Amaranthus spinosus)
spiny pigweed (Amaranthus spinosus)
spiny sowthistle (Sonchus asper)
spiny-leaved sow thistle (Sonchus asper)
spiny-toothed gumweed (Grindelia lanceolata)
spirea, bridalwreath (Spiraea prunifolia)
spongeplant, American (Limnobium spongia)
spoonleaf purple everlasting (Gamochaeta purpurea)
spotflower, oppositeleaf (Acmella repens)
spotted beebalm (Monarda punctata)
spotted cat's ear (Hypochaeris radicata)
spotted cowbane (Cicuta maculata)
spotted crane's bill (Geranium maculatum)
spotted geranium (Geranium maculatum)
spotted joe pye weed (Eutrochium maculatum)
spotted Joe-pye weed (Eutrochium maculatum)
spotted knapweed (Centaurea stoebe)
spotted ladysthumb (Persicaria maculosa)
spotted snapweed (Impatiens balsamina)
spotted St. John's-wort (Hypericum punctatum)
spotted St. Johnswort (Hypericum punctatum)
spotted touch-me-not (Impatiens capensis)
spotted water hemlock (Cicuta maculata)
sprangletop, Amazon (Leptochloa panicoides)
sprangletop, mucronate (Leptochloa panicea)
sprangletop, red (Leptochloa panicea)
spreading aster (Symphyotrichum patens)
spreading chervil (Chaerophyllum procumbens)
spreading dogbane (Apocynum androsaemifolium)
spreading eryngo (Eryngium prostratum)
spreading fleabane (Conyza ramosissima)
spreading sandmat (Euphorbia humistrata)
spreading wallflower (Erysimum repandum)
spreading yellow cress (Rorippa sinuata)
spreading yellowcress (Rorippa sinuata)
spring avens (Geum vernum)
spring beauty (Claytonia virginica)
spring blue eyed Mary (Collinsia verna)
spring coralroot (Corallorhiza wisteriana)
spring draba (Draba verna)
spring ladies' tresses (Spiranthes vernalis)
spring lady's tresses (Spiranthes vernalis)
spring vetch (Vicia sativa)
spring, harbinger of (Erigenia bulbosa)
spring, sweet breath of (Lonicera fragrantissima)
springbeauty, Virginia (Claytonia virginica)
springcress (Cardamine bulbosa)
spurge (Euphorbia humistrata)
spurge, blunt-leaved (Euphorbia obtusata)
spurge, cypress (Euphorbia cyparissias)
spurge, flowering (Euphorbia corollata)
spurge, Geyer's (Euphorbia geyeri)
spurge, graveyard (Euphorbia cyparissias)
spurge, groundfig (Euphorbia prostrata)
spurge, milk (Euphorbia prostrata)
spurge, nodding (Euphorbia nutans)
spurge, prostrate (Euphorbia maculata)
spurge, tinted woodland (Euphorbia commutata)
spurge, toothed (Euphorbia dentata)
spurge, warty (Euphorbia obtusata)
spurge, wood (Euphorbia commutata)
spurred anoda (Anoda cristata)
spurrey, corn (Spergula arvensis)
spurry, corn (Spergula arvensis)
square, carpenter's (Scrophularia marilandica)
squarestem spikerush (Eleocharis quadrangulata)
squaw huckleberry (Vaccinium stamineum)
squaw weed (Packera aurea)
squaw weed (Packera obovata)
squill (Scilla siberica)
squill, Siberian (Scilla siberica)
squirrel corn (Dicentra canadensis)
St. Andrew's cross (Hypericum hypericoides)
St. Anthony's turnip (Ranunculus bulbosus)
staggerbush (Lyonia mariana)
staggerbush, piedmont (Lyonia mariana)
staghorn sumac (Rhus typhina)
stalked wild petunia (Ruellia pedunculata)
stalkless yellowcress (Rorippa sessiliflora)
star chickweed (Stellaria pubera)
star magnolia (Magnolia stellata)
star of Bethlehem (Ornithogalum nutans)
star of Bethlehem (Ornithogalum umbellatum)
star tickseed (Coreopsis pubescens)
star violet (Houstonia pusilla)
star, Appalachian blazing (Liatris squarrulosa)
star, blazing (Liatris cylindracea)
star, blazing (Liatris scariosa)
star, blazing (Liatris squarrosa)
star, blazing (Liatris squarrulosa)
star, blue (Amsonia tabernaemontana)
star, ciliate blue (Amsonia ciliata)
star, common shooting (Primula meadia)
star, dense blazing (Liatris spicata)
star, dotted blazing (Liatris punctata)
star, Ontario blazing (Liatris cylindracea)
star, prairie blazing (Liatris pycnostachya)
star, scaly blazing (Liatris squarrosa)
star, shining blue (Amsonia illustris)
star, tall blazing (Liatris aspera)
star, wavyleaf blazing (Mentzelia albescens)
star-grass, water (Heteranthera dubia)
starglory, scarlet (Ipomoea coccinea)
starry campion (Silene stellata)
starry rosinweed (Silphium asteriscus)
starwort, false (Boltonia asteroides)
stellate sedge (Carex rosea)
stick, devil's walking (Aralia spinosa)
stickleaf (Mentzelia albescens)
stickleaf (Mentzelia oligosperma)
stickseed (Hackelia virginiana)
stickseed crowfoot (Ranunculus parviflorus)
sticktight (Bidens cernua)
sticktight (Bidens frondosa)
sticktight (Bidens vulgata)
sticky catchfly (Silene caroliniana)
sticky chickweed (Cerastium glomeratum)
sticky tick clover (Hylodesmum glutinosum)
stickywilly (Galium aparine)
stiff aster (Ionactis linariifolia)
stiff cowbane (Oxypolis rigidior)
stiff dogwood (Cornus foemina)
stiff gentian (Gentianella quinquefolia)
stiff goldenrod (Solidago rigida)
stiff marsh bedstraw (Galium tinctorium)
stiff sunflower (Helianthus pauciflorus)
stiff tickseed (Coreopsis palmata)
stiff yellow flax (Linum medium)
stiff-leaved aster (Ionactis linariifolia)
stiltgrass, Japanese (Microstegium vimineum)
stink grass (Eragrostis cilianensis)
stinkgrass (Eragrostis cilianensis)
stinking ash (Ptelea trifoliata)
stinking clover (Cleome serrulata)
stinking pepperweed (Lepidium oblongum)
stinkweed (Pluchea camphorata)
stinkweed (Ailanthus altissimus)
stinkweed (Thlaspi arvense)
stitchwort, Michaux's (Sabulina michauxii)
stitchwort, Pitcher's (Mononeuria patula)
stitchwort, pitcher's (Mononeuria patula)
stonecrop, ditch (Penthorum sedoides)
stonecrop, garden (Sedum erythrostictum)
stonecrop, three-leaved (Sedum ternatum)
stonecrop, woodland (Sedum ternatum)
stoneseed, American (Lithospermum latifolium)
stoneseed, narrowleaf (Lithospermum incisum)
stoneseed, Plains (Lithospermum incisum)
strawberry bush (Euonymus americanus)
strawberry, Indian (Duchesnea indica)
strawberry, Virginia (Fragaria virginiana)
strawberry, wild (Fragaria virginiana)
striped cream violet (Viola striata)
stylisma (Stylisma pickeringii)
sucker flax (Linum medium)
Sudan grass (Sorghum bicolor)
sugar plum (Amelanchier arborea)
Sullivant's coolwort (Sullivantia sullivantii)
sullivantia (Sullivantia sullivantii)
sulphur cinquefoil (Potentilla recta)
sulphur cosmos (Cosmos sulphureus)
sumac, aromatic (Rhus aromatica)
sumac, dwarf (Rhus copallinum)
sumac, fragrant (Rhus aromatica)
sumac, shining (Rhus copallinum)
sumac, smooth (Rhus glabra)
sumac, staghorn (Rhus typhina)
sumac, winged (Rhus copallinum)
summer coleus (Perilla frutescens)
summer lilac (Buddleja davidii)
summer phlox (Phlox paniculata)
summer snowflake (Leucojum aestivum)
sump weed (Iva annua)
sunbright (Phemeranthus parviflorus)
sundrops (Oenothera fruticosa)
sundrops (Oenothera linifolia)
sundrops (Oenothera pilosella)
sundrops, prairie (Oenothera pilosella)
sundrops, shrubby (Oenothera fruticosa)
sundrops, thread-leaved (Oenothera linifolia)
sunflower heliopsis (Heliopsis helianthoides)
sunflower, ashy (Helianthus mollis)
sunflower, bristly (Helianthus hirsutus)
sunflower, common (Helianthus annuus)
sunflower, false (Heliopsis helianthoides)
sunflower, fewleaf (Helianthus occidentalis)
sunflower, hairy (Helianthus hirsutus)
sunflower, Maximilian (Helianthus maximiliani)
sunflower, naked-stemmed (Helianthus occidentalis)
sunflower, pale-leaved (Helianthus strumosus)
sunflower, paleleaf woodland (Helianthus strumosus)
sunflower, prairie (Helianthus pauciflorus)
sunflower, rosinweed (Helianthus silphioides)
sunflower, sawtooth (Helianthus grosseserratus)
sunflower, small woodland (Helianthus microcephalus)
sunflower, stiff (Helianthus pauciflorus)
sunflower, tickseed (Bidens aristosa)
sunflower, willow-leaved (Helianthus salicifolius)
sunflower, willowleaf (Helianthus salicifolius)
sunflower, woodland (Helianthus divaricatus)
Susan, black-eyed (Rudbeckia hirta)
Susan, blackeyed (Rudbeckia hirta)
Susan, brown-eyed (Rudbeckia triloba)
Susan, browneyed (Rudbeckia triloba)
swamp agrimony (Agrimonia parviflora)
swamp beggar ticks (Bidens tripartita)
swamp buttercup (Ranunculus hispidus)
swamp dogwood (Cornus amomum)
swamp leather flower (Clematis crispa)
swamp loosestrife (Decodon verticillatus)
swamp lousewort (Pedicularis lanceolata)
swamp milkweed (Asclepias incarnata)
swamp smartweed (Persicaria amphibia var. emersa)
swamp smartweed (Persicaria hydropiperoides)
swamp thistle (Cirsium muticum)
swamp verbena (Verbena hastata)
swamp wood betony (Pedicularis lanceolata)
Swedish turnip (Brassica napus)
sweet anise (Osmorhiza longistylis)
sweet autumn virginsbower (Clematis terniflora)
sweet basil (Ocimum basilicum)
sweet breath of spring (Lonicera fragrantissima)
sweet cicely (Osmorhiza claytonii)
sweet coneflower (Rudbeckia subtomentosa)
sweet everlasting (Pseudognaphalium obtusifolium)
sweet sagewort (Artemisia annua)
sweet William (Dianthus barbatus)
sweet William phlox (Phlox maculata)
sweet wormwood (Artemisia annua)
sweetclover (Melilotus albus)
sweetclover (Melilotus officinalis)
sweetroot, Clayton's (Osmorhiza claytonii)
sweetroot, longstyle (Osmorhiza longistylis)
sweetscented bedstraw (Galium odoratum)
sweetscented joe pye weed (Eutrochium purpureum)
sweetshrub (Calycanthus floridus)
sweetshrub, eastern (Calycanthus floridus)
sweetwilliam (Dianthus barbatus)
sweetwilliam, wild (Phlox maculata)
swine cress (Lepidium didymum)
swinecress, lesser (Lepidium didymum)
tag alder (Alnus serrulata)
tail, lizard's (Saururus cernuus)
tajo, yerba de (Eclipta prostrata)
tall bellflower (Campanula americana)
tall blazing star (Liatris aspera)
tall burhead (Echinodorus berteroi var. berteroi)
tall coreopsis (Coreopsis tripteris)
tall dock (Rumex altissimus)
tall goldenrod (Solidago altissima)
tall green milkweed (Asclepias hirtella)
tall hedge mustard (Sisymbrium loeselii)
tall ironweed (Vernonia gigantea ssp. gigantea)
tall larkspur (Delphinium exaltatum)
tall morning-glory (Ipomoea purpurea)
tall nut grass (Scleria triglomerata)
tall rattlesnakeroot (Nabalus altissimus)
tall thimbleweed (Anemone virginiana)
tall thistle (Cirsium altissimum)
tall thoroughwort (Eupatorium altissimum)
tall tick trefoil (Desmodium paniculatum)
tall tickseed (Coreopsis tripteris)
tall tumblemustard (Sisymbrium altissimum)
tall white aster (Symphyotrichum lanceolatum)
tall white beard-tongue (Penstemon digitalis)
tall white lettuce (Nabalus altissimus)
tangle, turkey (Lippia nodiflora)
tansy mustard (Descurainia pinnata)
tansy mustard (Descurainia sophia)
tansy, common (Tanacetum vulgare)
tansymustard, western (Descurainia pinnata)
tassel flower (Brickellia grandiflora)
tasselflower brickellbush (Brickellia grandiflora)
tea, Hopi (Thelesperma megapotamicum)
tea, inland New Jersey (Ceanothus herbaceus)
tea, Jersey (Ceanothus herbaceus)
tea, Mexican (Chenopodium ambrosioides)
tea, Navajo (Thelesperma megapotamicum)
tea, New Jersey (Ceanothus americanus)
tea, Oswego (Monarda didyma)
tea, prairie (Croton monanthogynus)
tear-blanket (Aralia spinosa)
tear-thumb, arrow-leaved (Persicaria sagittata)
tear-thumb, halberd-leaved (Persicaria arifolia)
tears, widow's (Tradescantia virginiana)
tearthumb, arrowleaf (Persicaria sagittata)
tearthumb, halberdleaf (Persicaria arifolia)
teasel, common (Dipsacus fullonum)
teasel, cut-leaved (Dipsacus laciniatus)
teasel, cutleaf (Dipsacus laciniatus)
teasel, Fuller's (Dipsacus fullonum)
teasel, wild (Dipsacus fullonum)
telegraph plant (Heterotheca subaxillaris)
tephrosia, Virginia (Tephrosia virginiana)
Texas green eyes (Berlandiera texana)
Texas greeneyes (Berlandiera texana)
Texas saxifrage (Micranthes texana)
Texas toadflax (Nuttallanthus texanus)
thale cress (Arabidopsis thaliana)
thalia (Thalia dealbata)
thalia, powdery (Thalia dealbata)
thicket bean (Phaseolus polystachios)
thickleaf phlox (Phlox carolina angusta)
thickleaf phlox (Phlox carolina carolina)
thief, chicken (Mentzelia oligosperma)
thimbleweed (Anemone virginiana)
thimbleweed, tall (Anemone virginiana)
thinleaf betony (Stachys tenuifolia)
thistle, blue (Echium vulgare)
thistle, bull (Cirsium vulgare)
thistle, Canada (Cirsium arvense)
thistle, Carolina (Cirsium carolinianum)
thistle, field (Cirsium arvense)
thistle, field (Cirsium discolor)
thistle, field sow (Sonchus arvensis)
thistle, Kansas (Solanum rostratum)
thistle, musk (Carduus nutans)
thistle, nodding (Carduus nutans)
thistle, nodding plumeless (Carduus nutans)
thistle, perennial sow (Sonchus arvensis)
thistle, prickly sow (Sonchus asper)
thistle, roadside (Cirsium altissimum)
thistle, small-headed (Cirsium carolinianum)
thistle, soft (Cirsium carolinianum)
thistle, spiny-leaved sow (Sonchus asper)
thistle, swamp (Cirsium muticum)
thistle, tall (Cirsium altissimum)
thorny amaranth (Amaranthus spinosus)
thoroughwort (Eupatorium perfoliatum)
thoroughwort (Eupatorium semiserratum)
thoroughwort, hyssop-leaved (Eupatorium hyssopifolium)
thoroughwort, hyssopleaf (Eupatorium hyssopifolium)
thoroughwort, lateflowering (Eupatorium serotinum)
thoroughwort, pink (Fleischmannia incarnata)
thoroughwort, smallflower (Eupatorium semiserratum)
thoroughwort, tall (Eupatorium altissimum)
thread-leaved sundrops (Oenothera linifolia)
threadleaf evening primrose (Oenothera linifolia)
three bird orchid (Triphora trianthophoros)
three-leaved stonecrop (Sedum ternatum)
three-lobed violet (Viola palmata)
three-seeded mercury (Acalypha rhomboidea)
three-square, common (Schoenoplectus pungens)
three-styled chickweed (Cerastium dubium)
threebirds (Triphora trianthophoros)
threelobe beggarticks (Bidens tripartita)
threesquare, common (Schoenoplectus pungens)
thumb, lady's (Persicaria maculosa)
thumb, Oriental lady's (Persicaria longiseta)
thyme-leaved sandwort (Arenaria serpyllifolia)
thyme-leaved speedwell (Veronica serpyllifolia)
thymeleaf sandwort (Arenaria serpyllifolia)
thymeleaf speedwell (Veronica serpyllifolia)
ticks, beggar (Bidens frondosa)
ticks, beggar (Bidens tripartita)
ticks, beggar (Bidens vulgata)
ticks, swamp beggar (Bidens tripartita)
tickseed coreopsis (Coreopsis lanceolata)
tickseed sunflower (Bidens aristosa)
tickseed, golden (Coreopsis tinctoria)
tickseed, lanceleaf (Coreopsis lanceolata)
tickseed, largeflower (Coreopsis grandiflora)
tickseed, star (Coreopsis pubescens)
tickseed, stiff (Coreopsis palmata)
tickseed, tall (Coreopsis tripteris)
ticktrefoil, fewflower (Hylodesmum pauciflorum)
ticktrefoil, largebract (Desmodium cuspidatum)
ticktrefoil, nakedflower (Hylodesmum nudiflorum)
ticktrefoil, panicledleaf (Desmodium paniculatum)
ticktrefoil, pointedleaf (Hylodesmum glutinosum)
ticktrefoil, prostrate (Desmodium rotundifolium)
ticktrefoil, showy (Desmodium canadense)
ticktrefoil, smooth (Desmodium laevigatum)
ticktrefoil, velvetleaf (Desmodium viridiflorum)
tickweed (Verbesina virginica)
tie vine (Jacquemontia tamnifolia)
tim, Tiny (Geocarpon minimum)
timothy (Phleum pratense)
tinker's weed (Triosteum perfoliatum)
tinted woodland spurge (Euphorbia commutata)
tiny bluet (Houstonia pusilla)
tiny lazy daisy (Chaetopappa asteroides)
tiny mousetail (Myosurus minimus)
Tiny tim (Geocarpon minimum)
tiny trumpet (Collomia linearis)
tinytim (Geocarpon minimum)
toadflax, bastard (Comandra umbellata)
toadflax, blue (Nuttallanthus canadensis)
toadflax, Canada (Nuttallanthus canadensis)
toadflax, old-field (Nuttallanthus canadensis)
toadflax, southern blue (Nuttallanthus texanus)
toadflax, Texas (Nuttallanthus texanus)
toadshade (Trillium sessile)
tobacco, Indian (Antennaria parlinii)
tobacco, Indian (Lobelia inflata)
tobacco, ladies' (Antennaria parlinii)
tomato, husk (Physalis pubescens)
tongue, common hound's (Cynoglossum officinale)
tongue, yellow adder's (Erythronium americanum)
toothcup (Ammannia coccinea)
toothcup (Rotala ramosior)
toothed spurge (Euphorbia dentata)
toothwort, cut leaved (Cardamine concatenata)
toothwort, cutleaf (Cardamine concatenata)
top, heart-podded white (Lepidium draba)
Torrey's rush (Juncus torreyi)
touch-me-not, pale (Impatiens pallida)
touch-me-not, spotted (Impatiens capensis)
tragia, heart-leaved (Tragia cordata)
trailing bush clover (Lespedeza procumbens)
trailing lespedeza (Lespedeza procumbens)
trailing pearlwort (Sagina decumbens)
treacle mustard (Erysimum repandum)
tree groundpine (Lycopodium dendroideum)
tree of heaven (Ailanthus altissimus)
tree, cancer (Ailanthus altissimus)
tree, catawba (Catalpa speciosa)
tree, cigar (Catalpa speciosa)
tree, common hop (Ptelea trifoliata)
tree, fringe (Chionanthus virginicus)
tree, Judas (Cercis canadensis)
tree, princess (Paulownia tomentosa)
tree, royal paulownia empress (Paulownia tomentosa)
tree, sarviss (Amelanchier arborea)
tree, spindle (Euonymus atropurpureus)
tree-of-heaven (Ailanthus altissimus)
trefoil, bird's foot (Lotus corniculatus)
trefoil, bird's-foot (Lotus corniculatus)
trefoil, cluster tick (Hylodesmum glutinosum)
trefoil, fewflower tick (Hylodesmum pauciflorum)
trefoil, largebract tick (Desmodium cuspidatum)
trefoil, low tick (Desmodium rotundifolium)
trefoil, naked tick (Hylodesmum nudiflorum)
trefoil, prairie (Acmispon americanus)
trefoil, prostrate tick (Desmodium rotundifolium)
trefoil, showy tick (Desmodium canadense)
trefoil, smooth tick (Desmodium laevigatum)
trefoil, tall tick (Desmodium paniculatum)
trefoil, velvetleaf tick (Desmodium viridiflorum)
tresses, common ladies' (Spiranthes cernua)
tresses, little ladies' (Spiranthes tuberosa)
tresses, little lady's (Spiranthes tuberosa)
tresses, nodding ladies' (Spiranthes cernua)
tresses, nodding lady's (Spiranthes cernua)
tresses, northern slender lady's (Spiranthes lacera)
tresses, October lady's (Spiranthes ovalis)
tresses, oval ladies' (Spiranthes ovalis)
tresses, slender ladies' (Spiranthes lacera)
tresses, spring ladies' (Spiranthes vernalis)
tresses, spring lady's (Spiranthes vernalis)
tresses, twisted ladies' (Spiranthes vernalis)
trillium, drooping (Trillium flexipes)
trillium, dwarf white (Trillium nivale)
trillium, green (Trillium viride)
trillium, purple (Trillium recurvatum)
trillium, snow (Trillium nivale)
trillium, white (Trillium flexipes)
tropic croton (Croton glandulosus)
true forget-me-not (Myosotis scorpioides)
trumpet beard-tongue (Penstemon tubaeflorus)
trumpet creeper (Campsis radicans)
trumpet honeysuckle (Lonicera sempervirens)
trumpet vine (Campsis radicans)
trumpet, tiny (Collomia linearis)
trumpetweed (Eutrochium fistulosum)
tubercled orchid (Platanthera flava)
tuberous grasspink (Calopogon tuberosus)
tumble mustard (Sisymbrium altissimum)
tumble ringwing (Cycloloma atriplicifolium)
tumblemustard, tall (Sisymbrium altissimum)
tumbleweed (Amaranthus albus)
Turk's cap lily (Lilium michiganense)
turkey tangle (Lippia nodiflora)
turkey tangle fogfruit (Lippia nodiflora)
turkeyfoot (Andropogon gerardi)
turnip, Indian (Arisaema triphyllum)
turnip, prairie (Pediomelum esculentum)
turnip, St. Anthony's (Ranunculus bulbosus)
turnip, Swedish (Brassica napus)
turnsole (Heliotropium indicum)
turtlehead, pink (Chelone obliqua)
turtlehead, red (Chelone obliqua)
turtlehead, rose (Chelone obliqua)
turtlehead, white (Chelone glabra)
twayblade, large (Liparis liliifolia)
twayblade, lily (Liparis liliifolia)
twin berry (Mitchella repens)
twisted ladies' tresses (Spiranthes vernalis)
two-flowered Cynthia (Krigia biflora)
two-leaf water-milfoil (Myriophyllum heterophyllum)
two-seeded mercury (Acalypha deamii)
twoflower dwarfdandelion (Krigia biflora)
twoleaf miterwort (Mitella diphylla)
twoleaf watermilfoil (Myriophyllum heterophyllum)
umbrella grass (Fuirena simplex)
umbrella sedge (Cyperus pseudovegetus)
umbrella sedge (Cyperus squarrosus)
umbrella-sedge, western (Fuirena simplex)
umbrellawort, heart-leaved (Mirabilis nyctaginea)
upland boneset (Eupatorium sessilifolium)
upright burhead (Echinodorus berteroi var. berteroi)
upright prairie coneflower (Ratibida columnifera)
valerian, Greek (Polemonium reptans)
valley redstem (Ammannia coccinea)
valley, European lily of the (Convallaria majalis)
valley, feathery false lily of the (Maianthemum racemosum)
valley, lily of the (Convallaria majalis)
variegated milkweed (Asclepias variegata)
Vasey grass (Paspalum urvillei)
Vasey's grass (Paspalum urvillei)
veiny pea (Lathyrus venosus)
veiny pepperweed (Lepidium oblongum)
velvet panicum (Panicum scoparium)
velvet-leaf (Abutilon theophrasti)
velvetleaf (Abutilon theophrasti)
velvetleaf tick trefoil (Desmodium viridiflorum)
velvetleaf ticktrefoil (Desmodium viridiflorum)
velvetweed (Oenothera curtiflora)
velvety gaura (Oenothera curtiflora)
Venice mallow (Hibiscus trionum)
vente conmigo (Croton glandulosus)
Venus hair fern (Adiantum capillus-veneris)
Venus' pride (Houstonia purpurea)
verbena, bigbract (Verbena bracteata)
verbena, eastern (Glandularia canadensis)
verbena, hoary (Verbena stricta)
verbena, rose (Glandularia canadensis)
verbena, swamp (Verbena hastata)
vernal whitlow grass (Draba verna)
vernal witch-hazel (Hamamelis vernalis)
vervain, blue (Verbena hastata)
vervain, creeping (Verbena bracteata)
vervain, hoary (Verbena stricta)
vervain, narrow-leaved (Verbena simplex)
vervain, narrowleaf (Verbena simplex)
vervain, nettle-leaved (Verbena urticifolia)
vervain, prostrate (Verbena bracteata)
vervain, rose (Glandularia canadensis)
vervain, rose mock (Glandularia canadensis)
vervain, white (Verbena urticifolia)
vetch, bent milk (Astragalus distortus)
vetch, bigflower (Vicia grandiflora)
vetch, Carolina (Vicia caroliniana)
vetch, crown (Securigera varia)
vetch, garden (Vicia sativa)
vetch, large yellow (Vicia grandiflora)
vetch, lentil (Vicia tetrasperma)
vetch, narrow-leaved common (Vicia sativa)
vetch, Ozark milk (Astragalus distortus)
vetch, pale (Vicia caroliniana)
vetch, spring (Vicia sativa)
vetch, winter (Vicia villosa)
vetch, winter (Vicia villosa ssp. varia)
vetch, wood (Vicia caroliniana)
vetch, woolly (Vicia villosa)
vetch, woolly (Vicia villosa ssp. varia)
vetchling, bushy (Lathyrus venosus)
vine, American buckwheat (Brunnichia ovata)
vine, apricot (Passiflora incarnata)
vine, balloon (Cardiospermum halicacabum)
vine, blue (Cynanchum laeve)
vine, common balloon (Cardiospermum halicacabum)
vine, cross (Bignonia capreolata)
vine, cypress (Ipomoea quamoclit)
vine, hell (Campsis radicans)
vine, pepper (Ampelopsis arborea)
vine, puncture (Tribulus terrestris)
vine, quarter (Bignonia capreolata)
vine, sand (Cynanchum laeve)
vine, tie (Jacquemontia tamnifolia)
vine, trumpet (Campsis radicans)
vine, wild potato (Ipomoea pandurata)
violet blue eyed Mary (Collinsia violacea)
violet collinsia (Collinsia violacea)
violet rocket (Iodanthus pinnatifidus)
violet wood sorrel (Oxalis violacea)
violet woodsorrel (Oxalis violacea)
violet, bird's foot (Viola pedata)
violet, birdfoot (Viola pedata)
violet, butterfly (Viola sororia)
violet, cleft (Viola palmata)
violet, common (Viola sororia)
violet, common blue (Viola papilionacea)
violet, common blue (Viola sororia)
violet, cream (Viola striata)
violet, dogtooth (Erythronium americanum)
violet, downy yellow (Viola pubescens)
violet, green (Cubelium concolor)
violet, meadow (Viola sororia)
violet, Missouri (Viola missouriensis)
violet, pale (Viola striata)
violet, pansy (Viola pedata)
violet, prairie dogtooth (Erythronium mesochoreum)
violet, smooth yellow (Viola pubescens)
violet, star (Houstonia pusilla)
violet, striped cream (Viola striata)
violet, three-lobed (Viola palmata)
violet, water (Hottonia inflata)
violet, white dogtooth (Erythronium albidum)
violet, white dogtooth (Erythronium mesochoreum)
violet, yellow (Viola pubescens)
violet, yellow dogtooth (Erythronium americanum)
virgin's bower (Clematis terniflora)
virgin's bower (Clematis virginiana)
Virginia bluebells (Mertensia virginica)
Virginia bugleweed (Lycopus virginicus)
Virginia bunchflower (Melanthium virginicum)
Virginia buttonweed (Diodia virginiana)
Virginia copperleaf (Acalypha virginica)
Virginia cowslip (Mertensia virginica)
Virginia dayflower (Commelina virginica)
Virginia dwarf dandelion (Krigia virginica)
Virginia dwarfdandelion (Krigia virginica)
Virginia ground cherry (Physalis virginiana)
Virginia groundcherry (Physalis virginiana)
Virginia iris (Iris virginica)
Virginia knotweed (Persicaria virginiana)
Virginia lionsheart (Physostegia virginiana)
Virginia pennywort (Obolaria virginica)
Virginia pepper grass (Lepidium virginicum)
Virginia pepperweed (Lepidium virginicum)
Virginia plantain (Plantago virginica)
Virginia rock cress (Planodes virginicum)
Virginia snakeroot (Endodeca serpentaria)
Virginia spiderwort (Tradescantia virginiana)
Virginia spring beauty (Claytonia virginica)
Virginia springbeauty (Claytonia virginica)
Virginia strawberry (Fragaria virginiana)
Virginia tephrosia (Tephrosia virginiana)
Virginia threeseed mercury (Acalypha virginica)
Virginia water horehound (Lycopus virginicus)
Virginia waterleaf (Hydrophyllum virginianum)
Virginia wild rye (Elymus virginicus)
Virginia wildrye (Elymus virginicus)
Virginia winged rockcress (Planodes virginicum)
virginsbower, sweet autumn (Clematis terniflora)
viscid nightshade (Solanum sarrachoides)
wahoo (Euonymus atropurpureus)
wake robin (Trillium sessile)
wakerobin, nodding (Trillium flexipes)
wakerobin, wood (Trillium viride)
walking fern (Asplenium rhizophyllum)
walkingstick, devil's (Aralia spinosa)
wall-rue (Asplenium ruta-muraria)
wallflower, bushy (Erysimum repandum)
wallflower, sanddune (Erysimum capitatum)
wallflower, spreading (Erysimum repandum)
wallflower, western (Erysimum capitatum)
wallrue (Asplenium ruta-muraria)
walnut, black (Juglans nigra)
walnut, eastern black (Juglans nigra)
wapato (Sagittaria latifolia)
wart cress (Lepidium didymum)
warty spurge (Euphorbia obtusata)
water chinquapin (Nelumbo lutea)
water hyssop (Bacopa rotundifolia)
water locust (Gleditsia aquatica)
water parsley (Sium suave)
water parsnip (Sium suave)
water pepper (Persicaria hydropiper)
water pimpernel (Samolus parviflorus)
water purslane (Ludwigia palustris)
water purslane (Ludwigia polycarpa)
water scorpion grass (Myosotis scorpioides)
water shield (Brasenia schreberi)
water smartweed (Persicaria amphibia var. emersa)
water speedwell (Veronica catenata)
water star-grass (Heteranthera dubia)
water violet (Hottonia inflata)
water willow (Decodon verticillatus)
water willow (Justicia americana)
water-milfoil, two-leaf (Myriophyllum heterophyllum)
water-plantain (Ranunculus laxicaulis)
water-willow, American (Justicia americana)
watercress (Nasturtium officinale)
waterhyssop, disk (Bacopa rotundifolia)
waterleaf (Hydrophyllum virginianum)
waterleaf, bluntleaf (Hydrophyllum canadense)
waterleaf, broadleaf (Hydrophyllum canadense)
waterleaf, eastern (Hydrophyllum virginianum)
waterleaf, great (Hydrophyllum appendiculatum)
waterleaf, notchbract (Hydrophyllum appendiculatum)
waterleaf, Virginia (Hydrophyllum virginianum)
waterlily, American white (Nymphaea odorata)
watermilfoil, twoleaf (Myriophyllum heterophyllum)
waterparsnip, hemlock (Sium suave)
waterpod (Ellisia nyctelea)
watershield (Brasenia schreberi)
wavyleaf blazing star (Mentzelia albescens)
wavyleaf blazingstar (Mentzelia albescens)
wavyleaf purple coneflower (Echinacea simulata)
wax-leaved meadow-rue (Thalictrum revolutum)
waxweed, blue (Cuphea viscosissima)
waxy meadow-rue (Thalictrum revolutum)
waxyleaf meadow-rue (Thalictrum revolutum)
wayside speedwell (Veronica polita)
weak-leaf yucca (Yucca flaccida)
weatherglass, poor man's (Anagallis arvensis)
wedgeleaf draba (Draba cuneifolia)
weed, Atlantic mock bishop's (Ptilimnium capillaceum)
weed, big mock bishop's (Ptilimnium costatum)
weed, bitter (Ambrosia artemisiifolia)
weed, buffalo (Ambrosia trifida)
weed, bugle (Lycopus virginicus)
weed, butterfly (Asclepias tuberosa)
weed, camphor (Pluchea camphorata)
weed, camphor (Heterotheca camporum var. camporum)
weed, camphor (Heterotheca camporum var. glandulissima)
weed, camphor (Heterotheca subaxillaris)
weed, careless (Amaranthus spinosus)
weed, coffee (Senna obtusifolia)
weed, coffee (Senna occidentalis)
weed, frost (Verbesina virginica)
weed, green-stemmed Joe-pye (Eutrochium purpureum)
weed, hog (Conyza canadensis)
weed, hollow-stemmed Joe-pye (Eutrochium fistulosum)
weed, horse (Ambrosia trifida)
weed, Klamath (Hypericum perforatum)
weed, mulberry (Fatoua villosa)
weed, Ozark mock bishop's (Ptilimnium nuttallii)
weed, pickerel (Pontederia cordata)
weed, pineapple (Matricaria discoidea)
weed, quicksilver (Thalictrum dioicum)
weed, rattlesnake (Perilla frutescens)
weed, spotted joe pye (Eutrochium maculatum)
weed, spotted Joe-pye (Eutrochium maculatum)
weed, squaw (Packera aurea)
weed, squaw (Packera obovata)
weed, sump (Iva annua)
weed, sweetscented joe pye (Eutrochium purpureum)
weed, tinker's (Triosteum perfoliatum)
weedy dwarfdandelion (Krigia cespitosa)
weeping forsythia (Forsythia suspensa)
West Indian nightshade (Solanum americanum)
western brackenfern (Pteridium aquilinum)
western false gromwell (Onosmodium molle)
western ironweed (Vernonia baldwinii)
western pearly everlasting (Anaphalis margaritacea)
western ragweed (Ambrosia psilostachya)
western rock jasmine (Androsace occidentalis)
western rockjasmine (Androsace occidentalis)
western rough goldenrod (Solidago radula)
western sagewort (Artemisia campestris ssp. caudata)
western salsify (Tragopogon dubius)
western silver aster (Symphyotrichum sericeum)
western tansymustard (Descurainia pinnata)
western umbrella-sedge (Fuirena simplex)
western wallflower (Erysimum capitatum)
wheat (Triticum aestivum)
wheat, common (Triticum aestivum)
Wherry's pink (Silene caroliniana)
whip nutrush (Scleria triglomerata)
whipgrass (Scleria triglomerata)
white anemone (Anemone canadensis)
white avens (Geum canadense)
white baneberry (Actaea pachypoda)
white bear sedge (Carex albursina)
white blue-eyed grass (Sisyrinchium albidum)
white camas (Zigadenus elegans)
white campion (Silene latifolia)
white clover (Trifolium repens)
white cockle (Silene latifolia)
white crownbeard (Verbesina virginica)
white daisy (Leucanthemum vulgare)
white dogtooth violet (Erythronium albidum)
white dogtooth violet (Erythronium mesochoreum)
white doll's daisy (Boltonia asteroides)
white evening primrose (Oenothera speciosa)
white fawn lily (Erythronium albidum)
white fawnlily (Erythronium albidum)
white fringetree (Chionanthus virginicus)
white heath aster (Symphyotrichum pilosum)
white hickory (Carya tomentosa)
white horse nettle (Solanum elaeagnifolium)
white milkweed (Asclepias perennis)
white mountain mint (Pycnanthemum albescens)
white panicle aster (Symphyotrichum lanceolatum)
white prairie clover (Dalea candida)
white prickly poppy (Argemone albiflora)
white snakeroot (Ageratina altissima)
white sweet clover (Melilotus albus)
white trillium (Trillium flexipes)
white trout lily (Erythronium albidum)
white trout lily (Erythronium mesochoreum)
white turtlehead (Chelone glabra)
white upland aster (Solidago ptarmicoides)
white vervain (Verbena urticifolia)
white wake robin (Trillium flexipes)
white wand beardtongue (Penstemon tubaeflorus)
white water lily (Nymphaea odorata)
white whitlow wort (Draba reptans)
white wild indigo (Baptisia alba)
white-eyed grass (Sisyrinchium campestre)
whiteflower leafcup (Polymnia canadensis)
whiteleaf mountainmint (Pycnanthemum albescens)
whitemouth dayflower (Commelina erecta)
whitenymph (Trepocarpus aethusae)
whitestar (Ipomoea lacunosa)
whitetop (Lepidium draba)
whitetop fleabane (Erigeron annuus)
whitetop fleabane (Erigeron strigosus)
whitetop, lenspod (Lepidium chalepense)
whitlow grass (Draba brachycarpa)
whitlow grass (Draba cuneifolia)
wholeleaf rosinweed (Silphium integrifolium)
whorled milkweed (Asclepias quadrifolia)
whorled milkweed (Asclepias verticillata)
whorled milkwort (Polygala verticillata)
whorled mountainmint (Pycnanthemum pilosum)
wide-leaved spiderwort (Tradescantia subaspera)
widow's cross (Sedum pulchellum)
widow's tears (Tradescantia virginiana)
widowscross (Sedum pulchellum)
widowsfrill (Silene stellata)
wild ageratum (Conoclinium coelestinum)
wild basil (Perilla frutescens)
wild bean (Phaseolus polystachios)
wild bean (Strophostyles helvola)
wild bean (Strophostyles umbellata)
wild bergamot (Monarda fistulosa)
wild blue larkspur (Delphinium carolinianum)
wild blue phlox (Phlox divaricata)
wild blue phlox (Phlox divaricata f candida)
wild buckwheat (Fallopia convolvulus)
wild carrot (Daucus carota)
wild chamomile (Matricaria chamomilla)
wild cherry (Prunus serotina)
wild chervil (Chaerophyllum procumbens)
wild chervil (Chaerophyllum tainturieri)
wild chervil (Cryptotaenia canadensis)
wild coffee (Triosteum perfoliatum)
wild comfrey (Cynoglossum virginianum)
wild crab (Malus angustifolia)
wild four-o'clock (Mirabilis nyctaginea)
wild garlic (Allium vineale)
wild garlic (Allium canadense)
wild geranium (Geranium maculatum)
wild ginger (Asarum canadense)
wild goldenglow (Rudbeckia laciniata)
wild goose plum (Prunus hortulana)
wild gooseberry (Ribes missouriense)
wild honeysuckle (Aquilegia canadensis)
wild honeysuckle (Lonicera fragrantissima)
wild hyacinth (Camassia scilloides)
wild hydrangea (Hydrangea arborescens)
wild leek (Allium tricoccum)
wild lettuce (Lactuca canadensis)
wild madder (Galium obtusum)
wild mint (Mentha canadensis)
wild morning glory (Calystegia sepium)
wild oats (Chasmanthium latifolium)
wild onion (Allium canadense)
wild onion (Allium stellatum)
wild pansy (Viola bicolor)
wild pansy (Viola arvensis)
wild parsley (Lomatium foeniculaceum)
wild parsnip (Pastinaca sativa)
wild pear gourd (Cucurbita pepo)
wild petunia (Ruellia humilis)
wild petunia (Ruellia pedunculata)
wild petunia (Ruellia strepens)
wild pink (Silene caroliniana)
wild plum (Prunus americana)
wild potato (Pediomelum esculentum)
wild potato vine (Ipomoea pandurata)
wild pumpkin (Cucurbita foetidissima)
wild quinine (Parthenium hispidum)
wild quinine (Parthenium integrifolium)
wild radish (Raphanus raphanistrum)
wild raisin (Viburnum rufidulum)
wild snowball (Ceanothus americanus)
wild sorrel (Rumex hastatulus)
wild strawberry (Fragaria virginiana)
wild sweet William (Phlox divaricata)
wild sweet William (Phlox maculata)
wild sweetwilliam (Phlox maculata)
wild teasel (Dipsacus fullonum)
wild water pepper (Persicaria hydropiperoides)
wild wormwood (Artemisia campestris ssp. caudata)
wild yam (Dioscorea quaternata)
wildginger, Canadian (Asarum canadense)
wildrye, hairy (Elymus villosus)
wildrye, Virginia (Elymus virginicus)
William, sweet (Dianthus barbatus)
William, wild sweet (Phlox divaricata)
William, wild sweet (Phlox maculata)
willow amsonia (Amsonia tabernaemontana)
willow, creeping primrose (Ludwigia peploides)
willow, erect primrose (Ludwigia decurrens)
willow, floating primrose (Ludwigia peploides)
willow, hairy primrose (Ludwigia leptocarpa)
willow, sandbar (Salix interior)
willow, water (Decodon verticillatus)
willow, water (Justicia americana)
willow-leaved aster (Symphyotrichum praealtum)
willow-leaved lettuce (Lactuca saligna)
willow-leaved sunflower (Helianthus salicifolius)
willowherb, purpleleaf (Epilobium coloratum)
willowleaf aster (Symphyotrichum praealtum)
willowleaf lettuce (Lactuca saligna)
willowleaf sunflower (Helianthus salicifolius)
winecup (Callirhoe digitata)
wing-stemmed meadow beauty (Rhexia virginica)
winged loosestrife (Lythrum alatum)
winged lythrum (Lythrum alatum)
winged pigweed (Cycloloma atriplicifolium)
winged sumac (Rhus copallinum)
wingleaf primrose-willow (Ludwigia decurrens)
wingstem (Verbesina alternifolia)
winter honeysuckle (Lonicera fragrantissima)
winter scouring rush (Equisetum hyemale)
winter vetch (Vicia villosa)
winter vetch (Vicia villosa ssp. varia)
winter vetch (white) (Vicia villosa albiflora)
wisteria, American (Wisteria frutescens)
witch-hazel, American (Hamamelis virginiana)
witch-hazel, eastern (Hamamelis virginiana)
witch-hazel, Ozark (Hamamelis vernalis)
witch-hazel, vernal (Hamamelis vernalis)
witchhazel, American (Hamamelis virginiana)
witchhazel, Ozark (Hamamelis vernalis)
wolftail (Carex cherokeensis)
wood angelica (Angelica venenosa)
wood betony (Pedicularis canadensis)
wood mint (Blephilia hirsuta)
wood nettle (Laportea canadensis)
wood poppy (Stylophorum diphyllum)
wood rush (Luzula campestris)
wood sage (Teucrium canadense)
wood spurge (Euphorbia commutata)
wood vetch (Vicia caroliniana)
wood wakerobin (Trillium viride)
Wood's bunchflower (Veratrum woodii)
woodland agrimony (Agrimonia rostellata)
woodland lettuce (Lactuca floridana)
woodland pinkroot (Spigelia marilandica)
woodland stonecrop (Sedum ternatum)
woodland sunflower (Helianthus divaricatus)
woodnettle, Canadian (Laportea canadensis)
woodoats, Indian (Chasmanthium latifolium)
woodrush, field (Luzula campestris)
woodsorrel, slender yellow (Oxalis dillenii)
woodsorrel, violet (Oxalis violacea)
woollen breeches (Hydrophyllum appendiculatum)
woolly croton (Croton capitatus)
woolly dutchman's pipe (Isotrema tomentosa)
woolly hedgenettle (Stachys byzantina)
woolly pipevine (Isotrema tomentosa)
woolly plantain (Plantago patagonica)
woolly sweet cicely (Osmorhiza claytonii)
woolly vetch (Vicia villosa)
woolly vetch (Vicia villosa ssp. varia)
wormgrass (Spigelia marilandica)
wormseed (Chenopodium ambrosioides)
wormwood, annual (Artemisia annua)
wormwood, Roman (Ambrosia artemisiifolia)
wormwood, sweet (Artemisia annua)
wormwood, wild (Artemisia campestris ssp. caudata)
wort, small-flowered St. John's- (Hypericum mutilum)
wort, white whitlow (Draba reptans)
woundwort (Stachys pilosa)
wreath, bridal (Spiraea prunifolia)
Wright's plantain (Plantago wrightiana)
wrinkleleaf goldenrod (Solidago drummondii)
wrinkleleaf goldenrod (Solidago rugosa)
yam, fourleaf (Dioscorea quaternata)
yam, wild (Dioscorea quaternata)
yampah, eastern (Perideridia americana)
yanquapin (Nelumbo lutea)
yard grass (Eleusine indica)
yarrow (Achillea millefolium)
yarrow, common (Achillea millefolium)
yellow adder's tongue (Erythronium americanum)
yellow chamomile (Cota tinctoria ssp. subtinctoria)
yellow coneflower (Echinacea paradoxa)
yellow cress (Rorippa sessiliflora)
yellow crownbeard (Verbesina helianthoides)
yellow dock (Rumex crispus)
yellow dog-fennel (Helenium amarum)
yellow dogtooth violet (Erythronium americanum)
yellow flag (Iris pseudacorus)
yellow fringed orchid (Platanthera ciliaris)
yellow fumewort (Corydalis flavula)
yellow giant hyssop (Agastache nepetoides)
yellow harlequin (Corydalis flavula)
yellow iris (Iris pseudacorus)
yellow ironweed (Verbesina alternifolia)
yellow lady's slipper (Cypripedium calceolus)
yellow lady's slipper orchid (Cypripedium calceolus)
yellow marsh marigold (Caltha palustris)
yellow melilot (Melilotus officinalis)
yellow nutgrass (Cyperus esculentus)
yellow nutsedge (Cyperus esculentus)
yellow parilla (Menispermum canadense)
yellow passion flower (Passiflora lutea)
yellow passionflower (Passiflora lutea)
yellow pimpernel (Taenidia integerrima)
yellow pond lily (Nuphar advena)
yellow pond-lily (Nuphar advena)
yellow puccoon (Lithospermum incisum)
yellow rocket (Barbarea vulgaris)
yellow salsify (Tragopogon dubius)
yellow star grass (Hypoxis hirsuta)
yellow sweet clover (Melilotus officinalis)
yellow trout lily (Erythronium americanum)
yellow violet (Viola pubescens)
yellow water cress (Rorippa palustris var. fernaldiana)
yellow water lily (Nuphar advena)
yellow wood sorrel (Oxalis dillenii)
yellow wood sorrel (Oxalis stricta)
yellow-flowered gourd (Cucurbita pepo)
yellow-flowered horse gentian (Triosteum angustifolium)
yellow-flowered leaf cup (Smallanthus uvedalia)
yellow-fruited sedge (Carex annectens)
yellowcress, creeping (Rorippa sylvestris)
yellowcress, Fernald's (Rorippa palustris var. fernaldiana)
yellowcress, spreading (Rorippa sinuata)
yellowcress, stalkless (Rorippa sessiliflora)
yellowfruit horse-gentian (Triosteum angustifolium)
yellowfruit sedge (Carex annectens)
yellowrocket, garden (Barbarea vulgaris)
yellowseed false pimpernel (Lindernia dubia)
yerba de tajo (Eclipta prostrata)
yucca, soapweed (Yucca glauca)
yucca, weak-leaf (Yucca flaccida)
zigzag goldenrod (Solidago flexicaulis)
zigzag jointvetch (Aeschynomene rudis)
zigzag spiderwort (Tradescantia subaspera)
zizia, golden (Zizia aurea)


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