Echinacea purpurea (L.) Moench [ Echinacea intermedia Lindl. ex Paxton]
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Echinacea purpurea (L.) Moench [ Rudbeckia purpurea L.] [Compositae]
J. Paxton, Paxton’s Mag. Bot., vol. 15 : (1848) [S. Holden]