oak fern (suomeksi)

Määritelmät:

Any of various ferns which grow on trees and walls
genus (taxlink, Gymnocarpium, genus, noshow=1) (syn (taxlink, Thelypteris, genus, noshow=1))
especially (vern, common polypody) ((taxlink, Polypodium virginianum, species, noshow=1), native to North America, and ''Polypodium vulgare'', native to Europe), formerly thought to have medicinal properties when found growing on an oak.
* (RQ:Flr Mntgn Essays), II.12:
*: Why say we, that(...)to know the vertue of Reubarb, qualitie of '''Oak ferne''', and operation of Polipodie, is only peculiar unto man?