Cauline leaves 30-90 × 2-6 mm, reduced distally. Involucres 8-12 mm. Phyllary faces sparsely to moderately sericeous, sometimes sparsely stipitate-glandular distally. Ray florets 10-16; laminae 7-15. Disc florets 30-40; corollas 6.5-8.5 mm, lobes 0.6-0.8 mm, throats and lobes glabrous or proximal throats sparsely short-pilose. 2n = 36. Flowering late summer-fall (to Dec; rarely spring, Fla.). Sandy soils, margins of pine woods and scrub, roadsides; 0-600 m; Ala., Ark., Del., Fla., Ga., Ky., La., Md., Miss., N.C., Ohio, S.C., Tenn., Tex., Va.; Mexico; West Indies (Bahamas); Central America (Belize, Guatemala, Honduras). Variety latifolia is the most variable variety, particularly in leaf size, and involucre and stem heights.
Peduncles and invol silky, not glandular, or the invol glandular above; invol 8-12 mm; rays mostly ca 13, 7-12 mm; disk-fls 30-50, the dry cors 6.5-9 mm; 2n=36. Nearly the range of the sp. (Heterotheca g.; Pityopsis g.)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.