The study presents a taxonomic survey of Abarema Pittier, Calliandra Benth., Enterolobium Mart., Hydrochorea Barneby & J. W. Grimes, Macrosamanea Britton & Rose ex Britton & Killip and Zygia P. Brawne species from the Caxiuanã National Forest, followed by an identification key, descriptions, illustrations, comments on morphology and taxonomy, geographic distribution and periods of flowering and fruiting. Abarema was the most representative genus (3 spp.) followed by Zygia (2 spp.). The remaining genera had one species each. The species A. auriculata (Benth.) Barneby & J.W. Grimes, C. surinamensis Benth., H. corymbosa (Rich.) Barneby & J.W. Grimes, M. pubiramea (Steud.) Barneby & J.W. Grimes var. pubiramea and Z. latifolia var. lasiopus (Benth.) Barneby & J.W. Grimes are new records in the study area.
Amazon; Caxiuanã; Leguminosae; taxonomy
