The Asteraceae family in Parque Estadual de Itapuã, Viamão, Rio Grande do Sul

Abstract

The Parque Estadual de Itapuã, situated in the municipal district of Viamão, a important preservation area of Rio Grande do Sul state by sheltering remainders of original vegetation. The Asteraceae family presented a large number of species and wide distribution, principally in grassland habitat. The aim of this work is to register the Asteraceae species which occurrence in the study area, thus contributing for the better knowledge of this family. For this, a bibliographic and regional herbarium revision was realized involving others studies previously accomplished in Itapuã Park. Habit, habitats and phenology data ware registered for every species. We encountered 163 species, allotted in 13 tribes. The more numerous tribes were Astereae (36 species) and Eupatorieae (32 species). The collected examples flourish and fructify mostly in spring (51%) and autumn (46%). The large number of the species found, begin six menaced of extinction, denoted the importance this Conservation Unit to Rio Grande do Sul state.