Piptocarpha tetrantha Urb.
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Floras and Monographs
Piptocarpha tetrantha Urb.: [Article] Smith, Gerald L. & Coile, Nancy C. 2007.
(Compositae: Vernonieae). Fl. Neotrop. Monogr. 99: 1--94. Piptocarpha tetrantha Urb.: [Article] Acevedo-Rodríguez, Pedro. 2005. Vines and climbing plants of Puerto Rico and the Virgin Islands. Contr. U. S. Natl. Herb. 51: 1-483.