154 HISTORY OF BRITISH FERNS. 



larger plant is met with, which some botanists regard as a 

 mere form of the common species, but which is probably 

 distinct. 



Like other wall Ferns, this is often difficult to establish 

 in cultivation when first transplanted ; but when once this 

 is overcome, its cultivation is not difficult. It is best grown 

 in a cold frame, potted rather high, among loam mixed 

 with a large proportion of brick rubbish, and not over- 

 watered. Though generally found in exposed and rather 

 sunny situations, the finest examples we have seen were 

 found in a shaded, moist situation, under trees, where 

 sunshine never visited them. 



Among other names, this plant has borne those of 

 Asjylenium Ceterach, Scolopendrium Ceterach, Grammitis 

 Ceterach, Notolepeum Ceterach^ and Gymnogramma Cete- 

 rach. 



Genus IX. SCOLOPENDIIIUM, or HARTS- 

 TONGUE FERN. 



This genus is botanically very distinct from all our 

 other native Ferns ; and from other points of view is 



