Caracteres importantes na identificação de espécies de Ludwigia L. (Onagraceae) ocorrentes no Recôncavo da Bahia, Brasil

Abstract

The Onagraceae family is cosmopolitan, with worldwide distribution, most species are concentrated in the New World. In Brazil, it presents four genera, about 71 species, with Ludwigia genus being the most diversified, and occurring in all states. Most species of Ludwigia are amphibian, presenting a great phenotypic plasticity, making their identification complex and morphological studies of vegetative organs insufficient. The objective of this work was to analyze diagnostic characters in the delimitation of the Ludwigia species occurring in the Recôncavo of Bahia. The collections were made from 2013 to 2016. Morphological analyzes were carried out, with emphasis on fruits and seeds, collected materials and exsicates in the collections of some herbaria in Bahia. Illustrations, descriptions and dichotomous key construction of the species were made. The record of the five species found in the Recôncavo of Bahia was possible through the morphological characters of the fruits: shape and insertion of the eggs in the loci and also, of the seeds: shape, size, color, endocarp and raphe characteristics.