A floristic survey of the family Hymenophyllaceae was carried out in the "Parque Estadual das Fontes do Ipiranga (PEFI)". Six genera (Abrodictyum, Didymoglossum, Hymenophyllum, Polyphlebium, Trichomanes, and Vandenboschia) and nine species were reported. Four species of Hymenophyllum: Hymenophyllum caudiculatum Mart., Hymenophyllum hirsutum (L.) Sw., Hymenophyllum microcarpum Desv., and Hymenophyllum polyanthos (Sw.) Sw., and one species for each other genera: Abrodictyum rigidum (Sw.) Ebihara & Dubuisson, Didymoglossum reptans (Sw.) C. Presl, Polyphlebium angustatum (Carmich.) Ebihara & Dubuisson, Trichomanes polypodioides Raddi, and Vandenboschia radicans (Sw.) Copel. Identification keys for genera and species, as well as descriptions, geographical distribution, comments, and illustrations for some studied taxa are presented.
Atlantic forest; ferns; floristic survey; Hymenophyllum; Trichomanes
