i 7 8 



BRITISH FERNS 



Fig. 201. P. v. Cambricwn. 



Cambricum (Fig. 201 and Appendix No. XL VI). — This very beau- 

 tiful form was originally found in Wales, whence the name which 

 means Welsh, but it has subsequently been found in several other 

 places, some superior forms of it having been found in the Lake 

 District. As our illustration shows, the normal plain-edged lobes 

 are transformed into very deeply cut ones, and so widened as to 

 overlap each other considerably. The fronds, too, are of thinner, 

 papery texture, and are always perfectly barren. This is really 

 the true plumose form of the species. 



