genus Pityrogramma

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Noun1.genus Pityrogramma - terrestrial tropical ferns having fronds with powdery yellowish or white undersides; sometimes placed in family Polypodiaceae or Adiantaceae
fern genus - genera of ferns and fern allies
family Pteridaceae, Pteridaceae - one of a number of families into which the family Polypodiaceae has been subdivided in some classification systems; Pteridaceae is itself in turn sometimes further subdivided
Pityrogramma argentea, silver fern - fern of southern tropical Africa having fronds with white undersides
Pityrogramma calomelanos, silver fern - tropical American fern having fronds with white undersides
golden fern, Pityrogramma calomelanos aureoflava - tropical American fern having fronds with light golden undersides
gold fern, Pityrogramma chrysophylla - fern of West Indies and South America having fronds with bright golden-yellow undersides