Stems to 1 m, branched above, short- hairy mainly on the angles; lvs numerous, lance-linear, glabrous above, often puberulent on the midvein beneath, scaberulous on the margins, the main ones 3-6 cm נ3-10 mm, those subtending the heads much smaller; lateral veins 3-4 pairs, the uppermost arising near the middle of the lf; inner bracts thin, acute or short-acuminate, densely canescent or tomentulose; cal densely canescent distally, the deltoid lobes 0.5-1 mm; 2n=80. Upland woods and moist prairies; Me. to N.D., s. to Ga. and Okla.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.