Monographs Details: Pyrrhopappus
Authority: Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Description:Genus Description - Fls all ligulate and perfect, yellow, numerous; invol campanulate or narrower, calyculate, the inner bracts corniculate-appendaged near the tip; achenes oblong or linear, subterete or fusiform, with 5 broad, cross-rugulose ridges and as many narrow grooves, contracted above into a long, slender beak, which bears a ring of minute, soft, white, reflexed hairs just beneath the pappus of numerous sordid or rufescent capillary bristles. 3, N. Amer.