terrestrial tropical ferns having fronds with powdery yellowish or white undersides; sometimes placed in family Polypodiaceae or Adiantaceae
[ Syn: pityrogramma , genus pityrogramma ]
terrestrial tropical ferns having fronds with powdery yellowish or white undersides; sometimes placed in family Polypodiaceae or Adiantaceae
[ Syn: pityrogramma , genus pityrogramma ]