-(Foliar anatomy of Rubiaceae occurring in an urban forest fragment of Atlantic Forest, Paraná State, Brazil). Rubiaceae in Brazil occurs mainly in the Atlantic Forest biome that in the southern region is represented by two main vegetation types: Seasonal Semi-deciduous Forestand Araucaria Forest. Both occur in the Ecological Park Paul Gorski (PEPG), an urban forest fragment. Given the relevance of Rubiaceae in the Atlantic Forest and the importance of ecological anatomy studies to understand colonization and survival processes, this study aimed to anatomically characterize leaves of Rubiaceae found in the PEPG. We studied 14 species belonging to nine genera of Rubiaceae that present unistratified epidermis, trichomes, paracytic and paralelocytic stomata, dorsiventral mesophyll, and collateral vascular bundles as common characters to the family. Among the anatomical characters observed, considered common in mesophytes-heliophytes plants, stand papillae, trichomes, and compact mesophyll out. Therefore, these features are in accordance with the environmental conditions recorded in the area of edges and clearings of the Atlantic Forest and in disturbed areas. Keywords: Araucaria Forest, Atlantic Forest, ecological aspects, semi-deciduous forest RESUMO -(Anatomia foliar de Rubiaceae ocorrentes em fragmento de floresta urbana da Mata Atlântica, PR, Brasil). Rubiaceae no Brasil ocorre principalmente no Bioma Mata Atlântica que na região sul é representado por dois tipos principais de fitofisionomias: Floresta Estacional Semidecidual e Floresta Ombrófita Mista. Ambas ocorrem no Parque Ecológico Paulo Gorski (PEPG), fragmento florestal urbano. Diante da relevância de Rubiaceae na Mata Atlântica e da importância de estudos de anatomia ecológica para entender processos de colonização e sobrevivência este estudo teve como objetivo caracterizar anatomicamente as folhas de Rubiaceae encontradas no PEPG. Foram estudadas 14 espécies pertencentes a nove gêneros de Rubiaceae que apresentam como caracteres comuns à família: epiderme uniestratificada, tricomas, estômatos paracíticos e paralelocíticos, mesofilo dorsiventral e feixes vasculares colaterais. Dentre os caracteres anatômicos observados, considerados comuns em plantas mesófitas-heliófitas, destacam-se papilas, tricomas e mesofilo compacto. Portanto, essas características estão de acordo com as condições ambientais constatadas nas áreas de bordas e clareiras da Mata Atlântica e também em áreas antropizadas.

Iguaçu National Park represents the largest fragment of Inland Atlantic Rainforest of Paraná state. The vegetation is predominantly seasonal semideciduous forest, in the areas of Foz do Iguaçu and Capanema and a transition of this with Araucaria forest, in the Céu Azul area. This work aimed to recognize the genera and species of Rubiaceae occurring in the Park, through monthly collections from August 2013 to July 2014, supplemented with sporadic collections from May 2018 to April 2019. Thirty-five species were recorded, belonging to 19 genera. The most representative genera were Palicourea and Psychotria with five species, Galianthe, Manettia, Borreria with three, Geophila and Coccocypselum with two, and the other genera with only one species each. The areas with the major species richness were Foz do Iguaçu, with 24, of which four are exclusive to this area, followed by Céu Azul with 22 species, of which eight are exclusive. Of the 35 species recorded, seven occur in all areas and in both forest formations, seven occur only in the Araucaria forest area, and 20 occur only in the seasonal semideciduous forest. Borreria orientalis is highlighted due to its restricted distribution in Brazil, occurring only in Paraná, and Manettia tweedieana is considered endangered.