- potato fern, Marattia salicina - large Australasian evergreen fern with an edible rhizome sometimes used as a vegetable by indigenous people
--1 is a kind of fern
--1 is a member of Marattia, genus Marattia - potato fern, Solanopteris bifrons - small epiphytic fern of South America with tuberous swellings along rhizomes
--2 is a kind of fern
--2 is a member of Solanopteris, genus Solanopteris