oak fern

English

Alternative forms

  • oakfern

Noun

oak fern (plural oak ferns)

  1. A fern of genus Gymnocarpium (syn. Thelypteris) which grows on trees, especially Gymnocarpium dryopteris.
  2. A bat's wing fern (Histiopteris incisa)
  3. Synonym of common polypody (Polypodium vulgare), a fern formerly thought to have medicinal properties when found growing on an oak.

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