Monographs Details: Arrabidaea nigrescens Sandwith
Authority: Maguire, Bassett & Wurdack, John J. 1957. The Botany of the Guiana Highland -- Part II. Mem. New York Bot. Gard. 9 (3): 235-392.
Description:Distribution and Ecology - VENEZUELA: Territorio de Amazonas: woody vine on ground, fls. pink, at edge of Sabanita 1 km east of Maroa, Rio Guainia, 125 m, April 16th 1953, B. Maguire & J. J. Wurdack 35703.
Discussion:A form with old, thick, glabrescent leaflets, shining and sub-bullate above, and with relatively few forked hairs on the main nerves beneath. A very similar condition is shown by two other collections, Schultes and Pires 9114 from the Rio Vaupes, and Holt and Blake 595 from the Rio Negro, both localities being in Brazil. This is the first record from Venezuela, the species being known also from British Guiana and Suriname as well as from Amazonian Brazil.
Distribution:Venezuela South America