oak fern

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EnglishEdit

Alternative formsEdit

NounEdit

oak fern ‎(plural oak ferns)

  1. Any of various ferns which grow on trees and walls
    1. genus Gymnocarpium (syn Thelypteris)
    2. especially common polypody (Polypodium virginianum, native to North America, and Polypodium vulgare, native to Europe), formerly thought to have medicinal properties when found growing on an oak.

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