Piperales comprises five families, approximately 25 genera and 4000 species, with only Aristolochiaceae and Piperaceae occurring in Northeastern Brazil. This study is include in a serie of taxonomic monographs of the families found in the Atlantic forest fragments of the Usina São José, Igarassu, Pernambuco, Brazil. Field trips were conducted in nine fragments, between 2007 and 2011, and vouchers from herbaria were also studied. Nine taxa were found: Aristolochia labiata Willd., A. papillaris Mast. (Aristolochiaceae); Peperomia magnoliifolia (Jacq.) A. Dietr., P. pellucida (L.) Kunth., Piper arboreum var. hirtellum Yunck., P. caldense C. DC., P. hispidum Sw., P. hostmannianum (Miq.) C.DC. and P. marginatum Jacq. (Piperaceae). Identification keys, descriptions, comments and illustrations of the species are presented. Piper hostmannianum is recorded for the first time in Northeastern of Brazil.
Atlantic Forest; Aristolochia; Neotropics; new records; Piperales
