Plukenetia integrifolia Vahl, Eclog. Amer.

Plukenetia integrifolia Vahl, Eclog. Amer. View in CoL 3: 43. 1807. TYPE: GUYANA. Demerari, J.P.B. von Rohr 86 (holotype: C [barcode C 10011347; image!]).

Notes —See Gillespie (1993) for species discussion and Gillespie and Armbruster (1997) for species description. Molecular phylogenetic analyses confirmed the previous hypothesis ( Gillespie 1993) that the 3-veined cordiform leaves of P. verrucosa are a derived condition within the pinnately veined clade (subclades P1 1 P2) ( Fig. 1 View FIG ; Cardinal-McTeague et al. 2019a).

Taxonomic Discussion —Linnaeus f. (1781 publ. 1782) was the first to suggest there was a second species of Plukenetia from the Neotropics when he described the morphology of a new collection of P. volubilis from Suriname. However, there was no indication that Linnaeus f. meant for this to be a new species and it appears that he was expanding the concept of P. volubilis with the morphological variation found in Suriname (Dalberg s.n. S). Regardless, if we treat P. volubilis L.f. as a new species, it would be a homonym of P. volubilis L. and therefore illegitimate. As such, Smith (1799) was the first to provide a legitimate name, P. verrucosa Sm. , for the new species from Suriname. Smith (1799) recognized that the description of P. volubilis in Linnaeus f.’s Supplementum Plantarum (1781 publ. 1782) was associated with P. verrucosa , but by convention, type status would be conferred to the specimen listed in Smith’ s herbarium (Linn. collection of Surinam plants No. 146 LINN-HS).

VI. PLUKENETIA sect. PLUKENETIA . Sajorium sect. Pluknetia Baill., Étude Euphorb. 483. 1858. TYPE: Plukenetia volubilis L.