A phytosociological investigation in two fragments of restinga forest (flooded and nonflooded) in Riviera de São Lourenço complex, Bertioga, São Paulo, was carried out. Each fragment in the phytosociological survey was studied using 10×10 m plots. These plots were distributed in blocks of 20×30 m and 10×30 m, for a total area of 4,800 m². The 893 individuals sampled in both fragments were distributed in 83 species and 31 families. The species with highest importance values (IV) in the flooded restinga forest were: Manilkara subsericea (Mart.) Dubard, Amaioua intermedia Mart. ex K. Schum., Didymopanax angustissimum A. Sampaio, Miconia cubatanensis Hoehne, Euterpe edulis Mart., Syagrus pseudococos (Raud.) Glassm., Bactris setosa Mart., Guarea macrophylla Vahl. and Nectandra oppositifolia Ness & Mart. ex Mez; in nonflooded restinga forest these were: Eriotheca pentaphylla (Vell. emend K. Schum.) A. Robyns, Calophyllum brasiliense Cambess., Syagrus pseudococos, Tabebuia cassinoides (Lam.) DC., Manilkara subsericea, Tabebuia obtusifolia (Cham) Bureau, Didymopanax angustissimum, Sloanea guianensis (Aubl.) Benth. and Amaioua intermedia. Shannon's diversity index (H') was 3.50 in the flooded restinga forest and 3.70 in the nonflooded restinga forest.
Flooded restinga forest; unflooded restinga forest; physiognomy; coastal plain
