FITOSSOCIOLOGIA DO COMPONENTE ARBóREO DE UM FRAGMENTO DE FLORESTA ESTACIONAL SEMIDECIDUAL DO PARQUE SAINT’HILAIRE, VIAM O, RIO GRANDE DO SUL, BRASIL

The present work investigated the forest composition and the ecological structure in a Semi-deciduousSeasonal Forest bush area in the Saint'Hilaire Park, Viam o, RS - Brazil. The sampling was performed usingthe point center square method, and 55 sampled points had been raised 220 individuals with DBH ≥ 5cm.,pertaining to 22 families, 38 genera and 46 species. The botanical families who presented greater specificwealth had been Myrtaceae, Lauraceae, Fabaceae and Meliaceae. As the abundance of specimens, thefamilies who presented greater expression had been Euphorbiaceae, Myrtaceae and Rubiaceae. The mostimportant species for the showed area had been Sebastiania commersoniana, Gymnanthes concolor, Lueheadivaricata, Faramea marginata and Eugenia rostrifolia, that accumulated 45.23% value of the communityimportance.