Monographs Details: Potamoganos microcalyx (G.Mey.) 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: liana with purple fls., Rio Cuao, Rio Orinoco, 125 m, Jan. 1949, B. Maguire & L. Politi 28436; vine with purple fls., on rain forest slope, Cerro Huachamacari, Rio Cunucunuma, 400 m, Dec. 1950, B. Maguire, R. S. Cowan & J. J. Wurdack 29973.
Micropaegma cupulatum "(Splitg.)" M. Pichon, Bull. Soc. Bot. Fr. 92:225- 1945.
Hitherto known only from British Guiana and Suriname. The fruits and seeds of this genus are still unknown.
M. Pichon's new genus Micropaegma is unfortunately abortive, as its type species is M. "brachycalyx (Klotz.)" Pichon, based on Bignonia brachycalyx Klotzsch = Anemopaegma brachycalyx Bur. & K. Schum. That species, as I showed many years ago, in Rec. Trav. Bot. Neerl. 34:216, 218 (1937), is conspecific with Mussatia prieurei (DC.) Bur. ex K. Schum. At the same time (p.222), I showed that Anemopaegma cupulatum Bur. & K. Schum., as to their description, was identical with Potamoganos microcalyx, its queried basonym, Bignonia cupulata Splitg., being a synonym of Petastoma patelliferum (Schl.) Miers.
Distribution:Venezuela South America