Distephanus angulifolius (DC.) H.Rob. & B.Kahn [ Vernonia angulifolia DC.]
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Distephanus angulifolius (DC.) H.Rob. & B.Kahn [ Vernonia angulifolia DC.] [Compositae]
J.M. Wood, M.S. Evans, Natal Pl., vol. 6 : t. 543 (1909)