Monographs Details: Gleasonia uaupensis Ducke
Authority: Maguire, Bassett. 1967. The botany of the Guayana Highland--Part VII. Mem. New York Bot. Gard. 17: 1-439.
Family:Rubiaceae
Description:Distribution and Ecology - Caatinga white sand areas of the Rio Negro and tributaries, Amazonas, Brazil. BRAZIL. Amazonas: Rio Negro, Padauiry, Sao Pedro Froes 22667; Rio Negro, Preto Matupiry, Froes 22839; Rio Icana, Estacamento (Joao de Lapa), caatinga baixa, Black 48-2732; Galoruca, Rio Preto, regiao do Rio Negro, caatinga associado com pes de Barcela, Froes 28300; Rio Negro, Sao Felipe, regiao do Igarape Touri, caatinga ou mata aberta e baixa, Froes 28760, 28699; Rio Icana, caatinga de Santana, Froes 28169; Rio Preto, Matupiry, Froes 22828; Rio Negro, Rio la tributary to Marie, Froes 22384

Discussion:

Circa Igarape Jurupary fluminis Uapes partis infimae affluentem, Amazonas, Brazil, 2 Nov 1932, A. Ducke 23737.

This species has a corolla smaller than that of G. duidana. Although the stamens are stated by Ducke to be glabrous, they are sparsely to densely pilose in the specimens examined by me. Ducke employs the character of petiole length as one of the distinctions between G. uaupensis and G. duidana. However al­though the length of the petioles was described by Standley (Field Mus. Publ. Bot. 7: 372. 1931) as 1-2 cm, they vary from 1-3 cm long in the material examined by me, thus showing no contrast to those of G. uaupensis, whose petioles measure mainly 1-2.5 cm long.

Distribution:Brazil South America|