ABSTRACT
The current revision of the genus Curtia (Gentianaceae), which includes a key for identification, descriptions, illustrations and synonyms, recognized eight species: C. ayangannae, C. conferta, C. diffusa, C. obtusifolia, C. quadrifolia, C. tenella, C. tenuifolia, and C. verticillaris. The genus is Neotropical with its diversity center in Brazil. Curtia tenuifolia and C. tenella have wide geographic distribution, occurring in Central and South America, C. obtusifolia and C. quadrifolia are concentrated in the Amazonian region, and C. Ayangannae is restricted to Guyana. The other species occur in Brazil, from the Northeast to the South Region. Curtia obtusifolia has been confirmed as a distylous species and C. tenuifolia as a tristylous species.
Key words:
heterostily; morphology; neotropics; taxonomy