Sloanea L. (Elaeocarpaceae Juss.) nos estados do Amapá e Pará - Brasil.

Abstract

Elaeocarpaceae Juss. is one of the seven families of the order Oxalidales, with about 500 species, which occur in various vegetal formations. Among the Elaeocarpaceae genres occurring in Brazil, Sloanea L. stands out for its wide distribution. Sloanea has pantropical distribution, covering the Old and New World. About 150 species are currently recognized for the genus, of which 45 are referred to Brazil, with the highest concentration of species in the Amazon (38 species). Complementing information on the taxonomy and distribution of the genus, this study aimed to carry out taxonomic study of the species Sloanea occurring in the states of Amapá and Pará. This study is based on analysis of herbarium specimens of the MG, IAN, INPA, HAMAB and RB and analysis of scanned images of herbarium specimens of national and international herbaria. This resulted in the description of the genus and of the species study area, dichotomus keys do the species, geografic distribution of the species studied, illustration of diagnostic characters, and additional information related to the species in question. In this study, there was 15 species of Sloanea. Were found five species for the state of Amapá and 14 to the state of Pará. S. rufa is a new occurrence for the state of Amapá and S. laurifolia a new occurrence for the state of Pará. The results showed the presence of four species with wide distribution, common to the two states: Sloanea garckeana, S. grandiflora, S. latifolia and S. obtusa. The characters regarding the leaf venation resulted to be significant for the separation of the species. In some species the low number of samples, as well as the absence of fertile materials in good condition hindered the observations of morphological variations.