The Annonaceae from Natural Reserve Vale located in Linhares, Espírito Santo, include 11 genera and 27 species. Key to genera and species and illustrations to diagnostics characteristics are presented. Annona is the most diverse genus, with five species, followed by Guatteria, with four. Duguetia, Honschuchia, Oxandra, and Xylopia are represented by three species each, and Unonopsis by two. Anaxagorea, Cymbopetalum, Ephedranthus, and Pseudoxandra are represented by only one species each. There are 18 endemic species from the Atlantic Forest and four species are endemic from Natural Reserve Vale. The identity of Guatteria species is controversial. Male flowers of Pseudoxandra spiritus-sancti are described for the first time, constituting the first report of androdioecy in Pseudoxandra.
androdioecy; endemism; Guatteria; Atlantic Forest; Pseudoxandra
