Plants 1-10 dm from a branched caudex; herbage densely and finely puberulent with minute, loosely spreading hairs; lvs basally disposed, weakly or scarcely triple- nerved, the larger ones oblanceolate or a bit wider, 5-25 נ0.8-4 cm, ±toothed; infl paniculiform, sometimes long, narrow, and merely nodding at the tip, varying to more ample and sometimes with long divergent, recurved-secund branches; invol bracts imbricate, glabrous except for the ciliolate margins; rays 5-9, short; disk-fls 3-6; achenes short-hairy; 2n=18, 36. Dry woods and open places, especially in sandy soil; N.S. to Fla., w. to Alta. and Tex. Three vars.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.