Rudbeckia grandiflora var. alismifolia (Torr. & A. Gray) Cronquist
Family: Asteraceae
[Rudbeckia alismifolia Torr. & A. Gray]
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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.