Ratibida columnifera (Nutt.) Wooton & Standl. [ Lepachys columnaris (Pursh) Torr. & A.Gray]
no HD illustration available (m1)
Ratibida columnifera (Nutt.) Wooton & Standl. [ Rudbeckia columnifera Nutt.] [Compositae]
Helen Sharp, Water-color Sketches Amer. Pl.: (1888-1910) [Helen Sharp]