Scapose perennial 5-35 cm; lvs crowded, narrow, 7-30 cm נ3-20 mm, long-acuminate, entire, the margins villous-ciliolate and often crisped; invol 17-25 mm, its bracts subequal or slightly imbricate; achenes 8 mm, strongly striate throughout, tapering slightly to the truncate beakless apex; pappus of numerous mixed capillary bristles and very slender, gradually attenuate scales; 2n=18. Prairies and other dry open places, often in gravelly soil; Ill. and Wis. to Mont., Colo., and Okla. Apr.-June. (Agoseris c.; Nothocalais c.)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.