Abstract
Abstract In order to contribute to the study of the fern flora of the state of Pernambuco, we provide a synopsis of the genus Serpocaulon (Polypodiaceae) for Pernambuco. The three main herbaria in the state (IPA, PEUFR, and UFP) and herbaria of national reference (BHCB, RB, and SP) were visited, and online databases were consulted. Field expeditions were carried out in the different phytogeographic zones of the state. Descriptions, diagnostic illustrations, a key to species identification, taxonomic comments, and the geographic distribution of the species in the state are presented. Five species were recorded: Serpocaulon catharinae, S. menisciifolium, S. polystichum, S. richardii, and S. triseriale. They occur from sea level up to 1100 m. All species were recorded in Atlantic Forest, and S. triseriale was also found in Caatinga. The occurrence of S. polystichum and S. richardii in Pernambuco are being confirmed in this study. Additionally, the northern distribution limit of the species S. catharinae and S. menisciifolium is recorded in this state.
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