Comprehensive Description
provided by North American Flora
Hymenopappus filifolius Hook. Fl. Bor. Am. 1: 317. 1833
Hymenopappus tenuifoUus Dougl.; Hook. Fl. Bor. Am. 1: 317, as synonym. 1833.
A leafy-stemmed perennial; stem 3-5 dm. high, floccose, densely leafy towards the base, lower leaves 7-15 cm. long, twice pinnatifid into nearly filiform divisions, sparingly floccose, "in age glabrate; heads comparatively few; involucre 5-6 mm. high, 8-10 mm. broad, tomentose; bracts obovate, with yellow tips; corollas yellow; tube a little over 1.5-2 mm. long; throat campanulate, about 1.5 mm. long, longer than the ovate lobes; achenes 4 mm. long, densely silky-hirsute all over; squamellae very short, hidden by the hairs.
Type locality: Arid ground of the Columbia near the Walla-Walla.
Distribution: Saskatchewan to Washington, Nevada, New Mexico, and Kansas.
- bibliographic citation
- Per Axel Rydberg. 1914. (CARDUALES); CARDUACEAE; HELENIEAE. North American flora. vol 34(1). New York Botanical Garden, New York, NY
