An oak fern (Polypodium dryopteris) at left, and limestone polypody fern (Polypodium robertianum) at right.
An oak fern (Polypodium dryopteris) at left, and limestone polypody fern (Polypodium robertianum) at right. Chromolithograph from James Britten's "European Ferns" 1879.
Size: 4776px × 6396px
Photo credit: © Florilegius / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., britten, james