Abstract
We present a taxonomic study of the Melastomataceae that occur in the “Reserva de Desenvolvimento Sustentável do Tupé”, lower Negro River, Amazonas. Forty-two species from nine genera: Miconia (21 spp.), Clidemia (6 spp.), Aciotis, Bellucia and Tococa (3 spp. each), Henriettea and Tibouchina (2 spp. each), Adelobotrys and Maieta (1 sp. each). We present detailed descriptions and an identification key prepared through DELTA software. We also present illustrations and data on geographical distribution for the species. This study presents the first record for 27 species in the Reserve.