"Mata da Pavuna" is a fragment of Seasonal Semideciduous Forest located in a canyon characterized by rocky outcrops and shallow soil, in Botucatu municipality, São Paulo state. We collected fertile vascular plants and identified them to the lowest possible taxonomic level. We found 386 species in 84 families; Fabaceae was the most diverse family with 44 species, followed by Asteraceae (34), Euphorbiaceae (18), Poaceae (17), Malvaceae (14), Bignoniaceae (12) and Solanaceae (12). In the Pteridophyta sensu lato the most diverse families were Pteridaceae (nine species) and Polypodiaceae (seven). Compared to other comprehensive floristic surveys carried out in the Atlantic Forest these results show high floristic diversity with typical species from xerophytic vegetation, suggesting the presence of an enclave of dry forest. Pellaea ovata (Desv.) Weath. (Pteridaceae) is first reported here for Brazil.
rock outcrops; semideciduous seasonal forest; dry forest; Atlantic Forest; vascular plants
