#genus_Pityrogramma__Pityrogramma  terrestrial tropical ferns having fronds with powdery yellowish or white undersides; sometimes placed in family Polypodiaceae or Adiantaceae
  supertype:  #fern_genus  genera of ferns and fern allies
  member of:  #family_Pteridaceae
  member:  #Pityrogramma_argentea__silver_fern  fern of southern tropical Africa having fronds with white undersides
  member:  #silver_fern__Pityrogramma_calomelanos  tropical American fern having fronds with white undersides
  member:  #golden_fern__Pityrogramma_calomelanos_aureoflava  tropical American fern having fronds with light golden undersides
  member:  #gold_fern__Pityrogramma_chrysophylla  fern of West Indies and South America having fronds with bright golden-yellow undersides

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