In this study the taxonomic treatment of the family Pteridaceae is presented as part of the project "Lycophytes and monilophytes of the ecosystems of Pará", which aims to identify and list the species of the local flora. The experimental farm of Embrapa Amazônia Oriental lies in Moju municipality and comprises 1059hectares, primarily covered by non-flooded lowland rain forest and secondly by flooded lowland rainforest. Usual techniques and specialized literature were used for analyses and taxonomic identification of the collected specimens. Keys for the identification of genera and species are given, plus descriptions, illustrations, comments and distribution and habitat data. The family Pteridaceae is represented by 14 species in the study area: Acrostichum aureum L., Adiantum cajennense Willd. ex Klotzsch, A. glaucescens Klotzsch, A. paraense Hieron., A. tetraphyllum Humb. & Bonpl. ex Willd.,A. tomentosum Klotzsch, Ananthacorus angustifolius (Sw.) Underw. & Maxon, Anetium citrifolium (L.) Splitg., Hecistopteris pumila (Spreng.) J. Sm., Pityrogramma calomelanos (L.) Link var. calomelanos, Polytaenium guayanense (Hieron.) Alston, Vittaria lineata (L.) Sm., Adiantum dolosum Kunze and A. multisorum A. Samp. The latter two are new records for Pará state.
Amazon; flora; ferns; taxonomy
