Contribuição ao conhecimento de Couma macrocarpa Barb. Rodr. e C. utilis (Mart.) M. Arg. (Apocynaceae) da Amazônia

The author studies some morphological aspects on two species, of Couma (Apocynaceae) dealing with their taxonomy, and geographic distribution and general botanical data are also considered. Results indicate that foliar morphology may be used for specific identification. Results are documented by descriptions and by drawings.