EXPLANATION OF TEE PLATES. 



119 



II. Leaves without hair-points. Capsule rather oblique. 



Dioicous. 



Fig. 18. Grimmia unicolor. 

 Dingy Grimmia (a) . 



Colour. Black. 



Stems. Long, branched, tufted loosely, fastigiate. 



Leaves (b) . Thick, opaque, margin inflexed, without hair-points, very obtuse, 

 lanceolate. 



Capsule. Yellow brown, smooth, slightly oblique ; calyptra oblique. Spring (?) 

 Locality. Alpine rocks. 



Fig. 19. Grimmia atrata. 



Tuftpd Blade Grimmia (a) . 



Colour. Brownish black. 



Stems. Branched, more closely tufted. 



Leaves (b) . Thinner than in the last species ; margin renexed ; nerve thinner, not 

 so obtuse. 



Capsule. Longer and larger, yellow-brown when young-, black when old. Winter. 

 Locality. Alpine rocks. Rare. Clogwyn-y-Garuedd, Snowdon, Glen Callater. 

 (" Bryologia Britannica.") 



