Lithospermum latifolium Michx.

American Gromwell

Lithospermum latifolium plant

Family - Boraginaceae

Stem - Up to 1 m, ascending to erect, branched or unbranched, pubescent with stiff, appressed antrorse hairs.

Lithospermum_latifolium_stemStem.

Leaves - Lanceolate or narrowly ovate, somewhat roughened with stiff, appressed hairs; venation conspicuous.

Lithospermum_latifolium_leavesLeaves.

Inflorescence - No info. yet.

Lithospermum_latifolium_inflorescenceInflorescence.

Inflorescence - Solitary flowers in upper leaf axils.

Lithospermum_latifolium_inflorescenceInflorescence.

Calyces - 5-lobed, actinomorphic, 4-6 mm long, hairy.

Lithospermum_latifolium_calycesCalyces.

Flower - Corolla narrowly funnelform, lobes entire, pale yellow to greenish white. Stamens inserted near middle of corolla tube.

Lithospermum_latifolium_flowerFlower.

Fruits - Nutlets 3.5-5.0 mm long, nearly smooth, white.

Flowering - May - June.

Habitat - Mesic forests, usually on north-facing slopes.

Origin - Native to North America.

Other info. - This plant is relatively uncommon throughout its range. In Missouri it has been collected from only seven widely scattered counties in the northern half of the state. Superficially it resembles Onosmodium molle, though the flowers are much different.

Photographs taken in Daniel Boone Conservation Area, Warren County, MO, 4-17-2012 (SRTurner).



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