Hymenophyllaceae family and the genus Hymenophyllum Sm, which includes about 300 species distributed throughout the world, mainly tropical and subtropical, less frequent in temperate regions. The name of the genus Hymenophyllum from the Greek hymen meaning membrane and phylon meaning leaf in connection with the fronds with a finely membranous, delicate and transparent blade.
Hymenophyllum inaequale (Poir.) Desv., Is a small epiphytic fern present mainly on the trunks, it develops a long creeping rhizome, glabrous, branched.
