Levantamento florístico de fragmentos florestais na bacia hidrográfica do rio Gravataí, Rio Grande do Sul, Brasil

The purpose of this study is the floristic characterization of forest fragments in Gravatai River Basin, offering to provide a frame the of soil, hydric resource, and regional biodiversity conservation. A total of 10 forest fragments were analyzed, resulting in a list of 249 species, with 164 genera distributed in 70 families. The predominance of large distribution woody elements and from the floristic contingent of the Parana-Uruguay River Basin coming from the Deciduous Seasonal Forest were verified, also having species from the Atlantic Forest. The presence of some species belonging to the threatened taxa of the Rio Grande do Sul was also registered. Several appropriate species are indicated for rehabilitation of gallery forests.