Chrysopsis pilosa Nutt.

Chrysopsis pilosa plant

Family - Asteraceae

Stems - To -1m tall, erect, single from base but branching in upper half, densely pilose with long and short hairs(short hairs often glandular and viscid), herbaceous, with light green vertical lines, from thin branching taproot or fibrous roots.

Chrysopsis pilosa stem

Leaves - Alternate, sessile, oblong to oblong-linear, pilose, entire (lower leaves sometimes dentate), to +4cm long, -1cm broad, acute to mucronate, dense on stem.

Chrysopsis pilosa leaves

Inflorescence - Loose clusters of terminal flower heads. Each flower head long pedunculate.

Involucre - To 7mm tall(long), 6.5mm in diameter. Phyllaries imbricate, pilose externally, glabrous internally, linear, the longest to 6mm, with scarious margins.

Chrysopsis pilosa involucreInvolucre.

Ray flowers - Fertile, pistillate. Ligules yellow, 8mm long, 2.2mm broad, glabrous. Tube pubescent. Achenes (in flower) pubescent, 1.1mm long, compressed. Pappus of outer series of scales to 1mm long and inner series of capillary bristles to 5mm long.

Disk flowers - Disk 5-6mm in diameter. Corolla tubes to 3mm long, glabrous, 5-lobed. Lobes acute, .5mm long. Stamens 5, adnate at base of corolla tube, included. Anthers yellow, connate around style, 2mm long. Style bifurcate. Stigmas barbellate. Achenes (in flower) pubescent, ovoid and compressed, 2mm long. Pappus same as in ray flowers. Fruiting head brownish-tan and globose. Fruiting achenes 10-nerved.

Chrysopsis pilosa flowerFlower head.

Chrysopsis pilosa fruitFruiting head.

Flowering - June - October.

Habitat - Rocky dry prairies, fields, glades, roadsides.

Origin - Native to U.S.

Other info. - This species can be found in the southern Ozark region of Missouri. The plant is easy to ID in the field. The pilose stems and bright golden flowers are good characteristics to look for. The species is sometimes used in native landscaping and deserves more attention in cultivation.

Photographs taken at Logan Creek, Reynolds County, MO., 7-17-03.


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