Stachytarpheta cayennensis (Rich.) Vahl [ Verbena dichotoma Ruiz & Pavon]
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Stachytarpheta cayennensis (Rich.) Vahl [ Verbena cayennensis Rich.] [Verbenaceae]
H. Ruíz López, J.A. Pavon, Fl. Peruv., vol. 1(coloured version): (Plates 1-152): p. 23, t. 34, fig. b (1798)