Comprehensive Description
(
anglais
)
fourni par North American Flora
Hymenopappus arenosus A. Heller, Bull. Torrey Club 25: 200. 1898. A low perennial, cespitose at the base; stems 2-3 dm. high, densely white-floccose-tomentose, especially below; leaves 5-10 cm. long, mostly basal, twice or thrice pinnatifid into narrowly linear divisions; heads few, corymbose; involucre about 6 mm. high and 1 cm. broad; bracts obovate, with white or light-yellow tips, and floccose at the base; corollas yellow; tube about 2 mm. long; throat cylindro-campanulate, twice or thrice as long as the lobes; achenes silky villous, 3 mm. long; squamellae oblong, fully 1 mm. long.
Type locality: Espanola, New Mexico. Distribution: New Mexico, Colorado, and Arizona.
- citation bibliographique
- Per Axel Rydberg. 1914. (CARDUALES); CARDUACEAE; HELENIEAE. North American flora. vol 34(1). New York Botanical Garden, New York, NY
Comprehensive Description
(
anglais
)
fourni par North American Flora
Hymenopappus cinereus Rydb. Bull. Torrey Club 27: 634
1900.
Hymenopappus ochroleucus Greene, PI. Baker. 3: 30. 1901.
A low perennial with cespitose caudex; stems 2-3 dm. high, few-leaved, grayish-fioccose; leaves mostly basal, bipinnatifid into narrowly linear divisions, grayish-fioccose; heads few, corymbose; involucre 6 mm. high, 10-12 mm. broad, tomentose; bracts oblong-obovate, with yellowish tip and margins; corollas yellow; tube and throat each about 1.5 mm. long, the latter campanulate, twice as long as the ovate lobes; achenes 4 mm. long, loosely villoushirsute; squamellae obovate, nearly or fully 1 mm. long, not hidden by the hairs.
Type locality: Walsenburg, Colorado. Distribution: Colorado and Utah.
- citation bibliographique
- Per Axel Rydberg. 1914. (CARDUALES); CARDUACEAE; HELENIEAE. North American flora. vol 34(1). New York Botanical Garden, New York, NY
