A 343.42 ha area of cerrado was analysed in a disjunct, marginal cerrado area in Moji Guaçu Municipality, São Paulo State (Moji Guaçu Biological Reserve, 22º15'-16'S and 47º08'-12'W), southeastern Brazil. The predominantly open vegetation varies from "campo cerrado" to "cerrado" (restricted sense). The survey included all vascular plants in reproductive stage and was carried out in nineteen field trips to the area. A total of 2019 exsicata, representing 524 species, 286 genera and 83 families was collected. The cerrado flora as a whole and its two components (woody and herbaceous) were analysed separately. The wood flora is poorer than the herbaceous one, and is composed mainly of species belonging to Leguminosae, Myrtaceae and Rubiaceae. The cerrado flora as a whole, and the herbaceous component, in particular, are composed mainly of species belonging to Compositae, Gramineae and Leguminosae, three of the largest Angiosperm families.
vascular flora; cerrado; Moji Guagu Biological Reserve