- silver fern, Pityrogramma calomelanos - tropical American fern having fronds with white undersides
--1 is a kind of fern
--1 is a member of Pityrogramma, genus Pityrogramma - silver fern, Pityrogramma argentea - fern of southern tropical Africa having fronds with white undersides
--2 is a kind of fern
--2 is a member of Pityrogramma, genus Pityrogramma