Coreopsis tripteris L.

Single-stemmed perennial 1–3 m from a short, stout rhizome, usually glabrous and somewhat glaucous; lvs mainly cauline, numerous, on evident petioles 0.5–3 cm, mostly trifoliolate, or the upper entire, the lfls lanceolate or narrowly elliptic, 5–10(–13) cm × 6–25(–30) mm, the terminal one often again divided; heads several or many, the disk to 1 cm wide, yellow, becoming purplish or deep red, its cors 5-toothed; outer bracts ca 8, linear-oblong, obtuse, 2–3 mm, the inner much broader and 2–3 times as long, more acute; rays yellow, 1–2.5 cm; receptacular bracts narrowly linear or linear-clavate; style-appendages cuspidately acute; achenes obovate, 4–7 mm; pappus of a few minute erect bristles, sometimes also with 2 short, upwardly barbed awns; 2n=26. Mostly in moist or wet low places and in woods; Mass. and s. Ont. to Wis., s. to Fla. and Tex. July–Sept.

Can be grown by cuttings, divisions or seedlings.