Abstract The species of the Passiflora (Passifloraceae s.s.) are distributed in tropical and subtropical regions and are of great ecological importance. The Serra do Mar is formed of large escarpments along Brazil’s east coast, between the States of Rio de Janeiro and Rio Grande do Sul. This study aims to point out occurrences of Passiflora species in herbaria along the Serra do Mar, in addition to evaluating the conditions of each specimen found. The richness and sample effort maps were prepared to establish the locations where the greatest numbers of species and records were encountered. We evaluated the relationship of species distribution through Canonical Correlation (CCA) and Quadratic Polynomial Analysis. We also evaluated the floristic composition using a cluster analysis. Calculations of the Extent of Occurrence (EOO) and Area of Occupancy (AOO) were performed for endemic species to the Atlantic Forest area occurring in the Serra do Mar. A total of 53 species, belonging to the Passiflora were found in the Serra do Mar. The States of Rio de Janeiro and São Paulo were the ones that recorded the greatest numbers of species and collection effort. The climatic variables Precipitation of the Driest Quarter and Annual Average Temperature are the most correlated to the distribution of Passiflora in the area. Twenty-two species are endemic to the Atlantic Forest area, and 21 are recorded as having some degree of threat on Official Lists. In this study, we present all the Passiflora species recorded for the Serra do Mar, the richness of species, including those endemics to the Atlantic Forest, demonstrates the importance of the area for conservation.

Resumo O presente estudo visou inventariar a diversidade taxonômica da família Passifloraceae sensu stricto no Parque Estadual da Serra do Brigadeiro (PESB), Minas Gerais e investigar os aspectos ecológicos relacionados à distribuição, estado de conservação e ocorrência das espécies em diferentes classes de altitude dentro da área de estudo. Foram identificadas 11 espécies pertencentes ao gênero Passiflora, a saber: P. alata, P. amethystina, P. capsularis, P. edulis, P. filamentosa, P. mediterranea, P. miersii, P. porophylla, P. rhamnifolia, P. Speciosa e P. tetraden, das quais quatro são novos registros de ocorrência para o PESB (P. alata, P. capsularis, P. filamentosa e P. rhamnifolia). A maioria das espécies está enquadrada em categoria de ameaça de extinção regional, com exceção de P. filamentosa e P. miersii, classificadas como "Deficiente de Dados", e P. speciosa e P. mediterranea consideradas "Menos Preocupante". Apenas P. alata e P. rhamnifolia atingiram as maiores elevações na área, em campos de altitude (1.700-1.800 m).

Abstract The present study goal was to survey the taxonomic diversity of Passifloraceae sensu stricto in the Serra do Brigadeiro State Park (PESB), Minas Gerais and to investigate the ecological aspects related to the distribution, state of conservation and occurrence of the species in different altitude classes within the study area. Eleven species of the genus Passiflora were identified: P. alata, P. amethystina, P. capsularis, P. edulis, P. filamentosa, P. mediterranea, P. miersii, P. porophylla, P. rhamnifolia, P. speciosa and P. tetraden, of which four are new records for the PESB (P. alata, P. capsularis, P. filamentosa and P. rhamnifolia). Most of the species are considered endangered at a regional level, with exception of P. filamentosa and P. miersii, classified as "Data Deficient", and P. speciosa and P. mediterranea, considered as "Least Concern". Only P. alata and P. rhamnifolia reached the highest elevations in the area, in campos de altitude (1.700-1.800 m).