2 5 2 



BRITISH FERNS 



Fig. 307. .S\ v. spirals. 



Spiralk (Fig. 307). — Found in several places ; a dwarf, undulate 

 form, twisted like a corkscrew, and with very thick, leathery fronds ; 

 really a very congested, undulate form of the species. 



08. 6". v. iuh-iornutum. Fig. 309. .S\ v. supra-Hiieate-mitlfifutum 



Stansfieldii (Plate XXXVIII). — A splendid form raised from 

 spores of 5. v. undulaium ri«idum (see Fig. 314) ; fronds frilled and 

 fringed, a most unexpected result from such a source. 



