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17b. Rudbeckia grandiflora (Sweet) C. C. Gmelin ex de Candolle var. grandiflora
Stems hairy (hairs spreading proximally, ascending distally, ca. 1 mm). Leaves hirsute (hairs longer than 1 mm). 2n = 38.
Flowering late spring–summer. Mostly mesic to dry prairies, woodlands; 30–300 m; Ark., Ga., Ill., Kans., Ky., Miss., Mo., Ohio, Okla., Tex.
Variety grandiflora has been collected in Ontario; it evidently is no longer found there.
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