Perennials, 20-60+ cm. Internodes (± mid stem) 15-40(-60) mm. Leaves: petioles 0-1 mm; blades usually 3-foliolate, simple blades or leaflets entire or each ± pedately divided with 3-9+, ± linear to filiform lobes 5-25(-45+) × 0.5-1(-2) mm. Peduncles 2-5(-8+) cm. Calyculi of 8 linear bractlets 3-5(-9) mm. Phyllaries 8, lance-ovate, 6-7 mm. Ray laminae 12-20+ mm. Disc florets 30-40+; corollas yellow (sometimes drying blackish), 3.5-5.5 mm. Cypselae obovate to oblong, 3.5-4 mm. 2n = 26, 52, 78. Flowering Jun-Jul(-Aug). Oak wood, sandy soils; 10-500 m; Ont., Que.; Ala., Ark., Conn., D.C., Fl., Ga., Ky. Md., Mass., Miss., N.J., N.Y., N.C., Ohio, S.C., Tenn., Va., W.Va.