Pityrogramma

Từ điển WordNet v3.1 - WordNet Dictionary

noun

terrestrial tropical ferns having fronds with powdery yellowish or white undersides;
sometimes placed in family Polypodiaceae or Adiantaceae
• Syn:
genus Pityrogramma
• Hypernyms:
fern genus
• Member Holonyms:
Pteridaceae, family Pteridaceae
• Member Meronyms:
silver fern, Pityrogramma argentea, Pityrogramma calomelanos, golden fern, Pityrogramma calomelanos aureoflava,
gold fern, Pityrogramma chrysophylla