Monographs Details: Forsteronia gracilis (Benth.) Müll.Arg.
Authority: Maguire, Bassett & Wurdack, John J. 1958. The botany of the Guayana Highland--Part III. Mem. New York Bot. Gard. 10: 1-156.
Family:Apocynaceae
Description:Distribution and Ecology - VENEZUELA: Amazonas: B. Maguire & C. K. Maguire 35515, Serrania Yutaje, Rio Manapiare, occasional at streamside near Base Camp, elev. 175 m, March 3, 1953, climbing woody vine, flowers white, fragrant. BRAZIL: Estado do Amazonas: J. Murca Tires 60, Maues, praia alagavel do rio, Nov 30, 1946, cipo, flores brancas, folhas triverticiladas.

Discussion:

These specimens differ from typical F. gracilis in the anthers which are glabrous or rarely with a few dorsal hairs, instead of barbellate, and in the corolla-lobes which are much more densely pilose and with longer hairs within. The leaves may be opposite or ternate. It has not been possible to see a specimen of F. pilosa (Veil.) Muell.-Arg., known from Bahia, Rio de Janeiro, and Minas Gerais; this species is related to F. gracilis and distinguished as having "corollalobes conspicuously pilosulose within, anther tips glabrous or essentially so." F. gracilis previously has been reported from British Guiana (many citations) and only in the vicinity of Manaos in Brazil. Ducke 1890 from Esperanca, Amazonas, Brazil, has typically barbellate anthers. Krukoff 8534 from Municip. Sao Paulo de Olivenca, near Palmares, Brazil, and Buchticn 1896 from Mapiri, Bolivia, are probably also F. gracilis, but the flowers are too young for proper study.

Distribution:Venezuela South America| Brazil South America|