Composi？？o florística das espécies vasculares e caráter sucessional da flora arbórea de um fragmento de Floresta Estacional Semidecidual no Sul do Brasil

the floristic composition of vascular species present in an urban forest remnant in the ibipor？ forest park (23°15'71" s and 51°01'83" w, park entrance), southern brazil, was studied from may 2006 to may 2008. the species were divided in life form and tree species were placed in successional categories. a total of 176 native species, 147 genera and 57 families were found. the majority of species were angiosperms (98%) while 2% were pteridophyta. the richest families were fabaceae (19), bignoniaceae, malvaceae (nine), meliaceae and rubiaceae (eight). the tree species were majority (53%), following by herbaceous (16%), vines (14%), shrubs (13%) and epiphyte species (4%). the successional characterization of the tree species showed a slight predominance of the late secondary species (52%) over species of early succession (45%), indicating that the vegetation of the pfi is in the intermediate to advanced stage of ecological succession.