Distribution : Forêts humides de l'Ouest du plateau des Guyanes, 50-1200 m: Roraima (Brésil), Colombie (
Meta), T.F. Amazonas (Caño Iguana, Río Cataniapo, Sierra Pakaraima), Bolívar (Los Pijiguaos, Macizo del Chimantá [Acopán-tepui], Paragua, Río Caranacuni, Río Sotebe), Delta Amacuro (Serranía de Imataca) (G.A. Romero-González
in Berry
et al. 2003;
GBIF;
Flora do Brasil 2020;
Tropicos).
Type : Venezuela, Bolívar, Uaipan-tepui, plateau at southern foot of the peaks of Uaipan, large exposed sandstone shield, dry rocky savannah, 1200 m, 01/03/1967, fleurs. Flowers yellow. T. Koyama & G. Agostini 7381 (HT:
NY00990935).