Revision of Hymenophyllum (Hymenophyllaceae) of Southern Argentina and Chile

Abstract

We present a revision of the genus Hymenophyllum (Hymenophyllaceae) for temperate regions of Argentina and Chile. The study contains a key for the 22 species recognized within the current delimitation of the genus, including descriptions amended, illustrations and distribution maps. Serpyllopsis caespitosa and Hymenoglossum cruentum are included within the genus Hymenophyllum, and new synonyms are considered for other taxa. Lectotypes were designated for 21 names. We include a phylogeny using rbcL sequences, corroborating the positions of non-sampled taxa in the corresponding subgenera.