Coreopsis tripteris var. deamii Standley; C. tripteris var. smithii Sherff

Perennials, 90–180+ cm. Inter­nodes (± mid stem) 3–7(–10+) cm. Leaves: petioles 5–45 mm; blades usually 3-foliolate, leaflets usually simple, sometimes ± pinnately lobed, ultimate blades ± lanceolate, 4–9(–12+) cm × (9–)12–35+ mm. Peduncles 2–5+ cm. Calyculi of 5–6 oblong bractlets 1.5–5 mm. Phyllaries 8, ± oblong to lance-oblong, 6–8 mm. Ray laminae 12–22+ mm. Disc florets 40–80+; corollas red-brown to purplish, 5–6 mm. Cypselae obovate to oblong, 4–5(–6) mm. 2n = 26.

Flowering Jul–Sep. Heavy loams, moist sands, along streams, boggy meadows; 100–500 m; Ont., Que.; Ala., Ark., Conn., D.C., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Md., Mass., Mich., Miss., Mo., N.C., Ohio, Okla., Pa., R.I., S.C., Tenn., Tex., Vt., Va., W.Va., Wis.