"Papilionoideae (Leguminosae) on Caxiuanã National forest, Pará, Brazil"
Biodiversity, Fabaceae, Taxonomic treatment.
The Caxiuanã National Forest was created on November 28, 1961 in the State of Pará. Corresponds to the First National Forest created in the Amazon Region and the second in the entire national territory.It presents representative characteristics for the Amazon, such as primary terra firme forests, floodplain várzea and igapó forests, and campinas areas. Floristic studies developed in the Caxiuanã forest have demonstrated the great richness and diversity of species belonging to the Leguminosae family. This comprises about 19,500 species and 770 genera with a cosmopolitan distribution and is currently divided into six subfamilies with Papilionoideae being the most diverse, with around 1,400 species, in Flona it is made up of about 100 species, 41 being Papilionoideae. The subfamily consists of trees, vines, shrubs or herbs usually pinnate leaves with the presence of pulvinus, commonly papilionaceous and with superior ovary. The objective of this study was to carry out a taxonomic treatment for Leguminosae-Papilionoideae species occurring in the Caxiuanã National Forest, presenting descriptions, elaboration of identification keys and taxonomic comments. 41 species and 3 varieties were found in the study area, of these, 4 species are endemic to Brazil.