Coarse, taprooted perennial mostly 1-2 m; stem woolly-villous, freely branched above; lvs ±numerous, alternate, white-tomentose beneath, glabrous above, lanceolate or lance- elliptic, broadly sessile or with an expanded, chartaceous, short-petiolar base, the larger ones mostly 10-15 נ1.5-3 cm; invols numerous, 3-4 mm, closely woolly-villous, shortly lobed; perianth closely woolly- villous outside, tapering to a shortly stipitate base; tep all alike, yellowish inside; filaments glabrous. Ours in cedar-glades; mainly Ozarkian, from Mo. and Kans. to La. and Tex., but irregularly e. to Ky., Tenn., Ala., and Fla. June-Oct. Our plants, as here described, belong to var. harperi (Goodman) Reveal, local in Ky. (Christian Co.), Tenn., and Ala. (E. harperi)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.