Two adder's tongue ferns (Ophioglossum vulgatum) and four ferns of a miniature variety (O. lusitanicum).

Two adder's tongue ferns (Ophioglossum vulgatum) are shown at right, and four ferns of a miniature variety (O. lusitanicum) are shown at left. Chromolithograph from James Britten's "European Ferns" 1879.

Size: 4752px × 6420px
Photo credit: © Florilegius / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: britten, james, left., shown