Helianthus maximiliani Schrad.

Perennial with crown-buds, short rhizomes, and thickened, often fleshy-roots; stems usually several, 0.5–3 m, conspicuously pubescent, especially upwards, with mostly short, white, ± appressed hairs; lvs strongly scabrous on both sides, lanceolate, acuminate, 7–20 × 1–3 cm, entire or slightly toothed, firm, pinnately veined, not triplinerved, gradually narrowed to the short, winged petiole or subpetiolar base, generally at least some of them openly folded along the midrib and often falcate, the upper often mainly alternate; heads generally several, the infl tending to be elongate and racemiform; invol bracts narrow, firm, attenuate or subcaudate, loose, often much exceeding the disk, canescent with short white hairs and sometimes basally ciliate; disk yellow, 1.5–2.5 cm wide; rays mostly 10–25, 1.5–4 cm; 2n=34. Prairies and waste ground, often in sandy soil; Man. and Minn. to Mo., w. to B.C. and Tex., and sparingly intr. eastward; perhaps native as far e. as Mich. July–Oct. (H. dalyi, a depauperate form)

Can be grown by divisions.