Brotto, Marcelo Leandro creator Lozano, Eduardo Damasceno creator Marinero, Felipe Eduardo Cordeiro creator Uhlmann, Alexandre creator Blum, Christopher Thomas creator Roderjan, Carlos Vellozo creator text periodical abstract or summary bl. continuing eng ABSTRACT We performed a phytosociological study on an altitudinal gradient in Lauráceas State Park (Parque Estadual das Lauráceas/PR), aiming to describe the Montane Atlantic Rain Forest, to verify the importance of Lauraceae, and to evaluate the communities’ successional stage. We distributed survey units (2,000 m² quadrats) along an altitudinal gradient and surveyed all individuals with DBH ≥ 10 cm, which composed the arboreal component. In smaller quadrats (250 m²), we surveyed regeneration individuals. The community at 800 and 900 m a.s.l. shows typical characteristics of Montane forest in an advanced successional stage, and the abundance of Ocotea catharinensis is its main indicator. At 1,000 and 1,100 m a.s.l., the forest is characterized as Montane with short stature in an advanced successional stage, with the occurrence of typical upper montane species such as O. porosa and O. vaccinioides. Keywords: Atlantic forest, Lauráceas State Park, phytosociology Publicação on-line; 34 ref.; 3 tables; 2 illus.; Summary (En) MATA ATLÂNTICA PARQUE ESTADUAL DAS LAURÁCEAS LAURACEAE FLORESTA Rio de Janeiro-RJ Instituto de Florestas - UFRRJ 1994 2025-0452 1415-0980 / ISSN 2179-8087 0nline BR2026001265 v. 26(4) p. 1-12; (2019) https://www.scielo.br/j/floram/a/MhS5twLWpwCJzkg5nNgnB8g/?format=pdf&lang=en https://www.scielo.br/j/floram/a/MhS5twLWpwCJzkg5nNgnB8g/?format=pdf&lang=en BR-BrBNA 260422 20260422193956.0 eng