
248 BRITISH FERNS 
PECTINATUM JoNES.—Marginate, with comb-like edges. 
PERAFERENS.—Found in several places with slight variations ; 
truncate fronds terminating in a pocket and thorn. 
PERAFERO-SAGITTATUM DRUERY.—Frond and basal lobes termi- 
nate abruptly with pockets and projecting midrib. 
RADIOSORUM.—Fronds normal, but with rounded ends, where the 
sori are arranged like the figures of a clock ; a form of truncatum. 

RAMO-CRISTATUM.—Fronds branch repeatedly, bearing crests 
at terminals on lines of ramo-marginatum, but leafer and non- 
marginate. | 
К.-с. Могу.—А splendid form (see Appendix No. LX XXVI). | 
RAMO-CRISTULATUM STANSFIELD,—A branched form of cris- 
tulatum, 


Fig. 300. S, v. ramo-marginatum. 
RAMO-MARGINATUM (Plate XXXVII, Fig. 300).—A magnificent 
branch-crested form, narrow and marginate, and repeatedly 
branching until a wide and beautiful crest is developed. 

