This study is based on a systematic sample of the flora of mixed ombrophilous forest in Santa Catarina, composed by 155 sample plots located all over it's geographic extension. We recorded 925 spermatophytes species divided in 439 genera and 116 botanical families. The family with major specific richness was Asteraceae (119 species), followed by Myrtaceae (88), Fabaceae (58) and Solanaceae (52). Among the remaining families, 34 of them had only one species and other 27 families obtained only two registered species. The genera with major number of species were: Solanum (31 species), Baccharis (27), Eugenia (23), Ocotea (21), and Myrcia (19). Araucaria angustifolia, Butia eriospatha, Ocotea odorifera e O. porosa are redlist species. Among all the species of the arboreous and shrubby/subarboreous component, 56.5% are common in both components. Among the 194 tree species reported in the literature quoted for the altiplano of Santa Catarina, 157 were registered in the present study. The floristic survey in the surroundings of the IFFSC sample plots recorded another 474 angiosperm species, besides the species collected within the sample plots. The IFFSC sampled a significant number of Atlantic Forest species, held in a georeferred collection that represents an important progress for the knowledge about the flora of Santa Catarina. Systematics floristic inventories are necessary also in other regions in southern of Brazil to make a consistent and updated database.
botanical collection; diversity; Araucaria forest; species list; Atlantic Forest
