Cantua flexuosa (Ruiz & Pavon) Pers. [ Periphragmos flexuosus Ruiz & Pav.]
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Cantua flexuosa (Ruiz & Pavon) Pers. [ Periphragmos flexuosus Ruiz & Pav.] [Polemoniaceae]
H. Ruíz López, J.A. Pavon, Fl. Peruv., vol. 1(coloured version): (Plates 1-152): p. 17, t. 131 (1798)