TRICHOMANES -RADICANS 257 
UNGUICEPS.—A narrow form of the marginate section with 
divided tips which curve downwards like claws. 





Eo 315. о 9. Marder. 
WARDII (Fig. 315).—A dense, conglomerate form, the whole plant 
becoming а mass with no indication at all of the normal strap ; 
the frond edges bear bulbils ; raised by Mr. Glave of Scarborough. 
TRICHOMANES RADICANS (THE BRITISH FERN) 
(Plate XX XIX) 
Trichomanes radicans belongs to the small group of Filmy Ferns 
found in Great Britain, but which are abundant in tropical and 
subtropical Fern habitats where extremely 
humid conditions, both of soil and atmos- 
phere, prevail. Their fronds (Fig. 316) are 
so thin and translucent as to be entirely 
dependent upon such conditions for their 
existence, since dry air shrivels them at 
once beyond recovery. In this country T. 
vadicans has been reported as found in York- 
shire, but in Ireland it has been found so 
frequently as to have acquired the popular 1 
name of the Killarney Fern. Its name Fig. 316. 7. radicans (pinna). 

