Rev. Inst. Flor. v. 30 n. 1 p. 53-70 jun. 2018 http://dx.doi.org/10.24278/2178-5031.201830105 ISSN impresso 0103-2674/on-line 2178-5031 VASCULAR FLORA CHECKLIST OF THE IBICATU ECOLOGICAL STATION, PIRACICABA, SÃO PAULO, BRAZIL 1 ESPÉCIES DA FLORA VASCULAR DA ESTAÇÃO ECOLÓGICA DE IBICATU, PIRACICABA, SÃO PAULO, BRASIL Laíne Silveira Corrêa 2,6 ; André Vito Scatigna 2 ; Danilo Soares Gissi 3 ; Danielle Muniz da Silva 2 ; Matheus Martins Teixeira Cota 4 ; Vinícius Castro Souza 2,3 ; Natália Macedo Ivanauskas 5 ; Jorge Yioshio Tamashiro 2 ; Ricardo Ribeiro Rodrigues 2,3 1 Recebido para análise em 18.04.2017. Aceito para publicação em 24.05.2018. 2 Universidade Estadual de Campinas, Instituto de Biologia, Programa de Pós-graduação em Biologia Vegetal, Rua Monteiro Lobato, 255, CEP 13083-862. Campinas, SP, Brasil. 3 Escola Superior de Agricultura “Luiz de Queiroz”, Departamento de Ciências Biológicas, Avenida Pádua Dias, 11, CEP 13418-900, Piracicaba, SP, Brasil. 4 Universidade de São Paulo, Instituto de Biociências, Departamento de Botânica, Rua do Matão, 277. CEP 05508-090, São Paulo, SP. Brasil. 5 Instituto Florestal, Divisão de Dasonomia, Seção de Ecologia Florestal, Rua do Horto, 931, Horto Florestal, CEP 02377-000, São Paulo, SP. Brasil. 6 Autor para correspondência: Laíne Silveira Corrêa - laine06correa@gmail.com ABSTRACT – Small forest fragments are recognized as relevant for the preservation of the São Paulo State Semideciduous Seasonal Forest. Our research presents an updated checklist of the vascular fora of the small fragment of legally protected forest, located in the São Paulo State countryside, known as Ibicatu Ecological Station, with the main goal of discussing its importance for local and regional biodiversity conservation. We used the walking method, for a qualitative foristic survey, and botanical material was collected in reproductive and vegetative state. We sampled 187 species typical of the semideciduous seasonal forest, distributed in diferent eight life forms, with predominance of non-woody life forms, especially herbs and epiphytes. We identifed 11 endangered species, including Peperomia hydrocotyloides, considered extinct from the São Paulo State, and some exotic and invasive species. We consider that this small forest fragment present rich vascular fora typical of the São Paulo countryside, in diferent life forms, and it is essential for local and regional biodiversity. This study added 102 species to the previously published checklist, emphasizing the importance of foristic surveys that include all life forms. Keywords: Atlantic Forest; conservation; Seasonal Semideciduous Forest.