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17a. Rudbeckia grandiflora (Sweet) C. C. Gmelin ex de Candolle var. alismifolia (Torrey & A. Gray) Cronquist, Rhodora. 47: 401. 1945.
Rudbeckia alismifolia Torrey & A. Gray, Fl. N. Amer. 2: 310. 1842 (as alismaefolia)
Stems glabrous or sparsely hairy proximally and hairy distally (hairs ascending, mostly shorter than 0.5 mm). Leaves scabrous to puberulent. 2n = 38.
Flowering late spring–summer. Prairies, open sites; 30–200 m; Ark., Ky., La., Miss., Tex.
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