HANDBOOK OF BRITISH HEPATIC^. 35 



acuminate, echinately dentate, decurved, com- 

 plicate at the base ; involucral two - lobed, 

 entire ; perianth terete, apex pentagonal, with 

 costate wings. 



Jungermannia hamatifolia ft echinata, Hook. 

 Br. Jung. 51. Jungermannia calcarea, Lib. 

 Crypt Exs. No. in. Jungermannia echinata, 

 Tayl. in Spruce Trans. Bot. Soc. Edin. II., 

 88. Lejeunia calcarea, Lib. Ann. VI., 373, t. 

 96, f. i ; Gott. and Rab. Exs. No. 46, 283, 

 3 2 3> S^S ; Spruce Trans. Bot. Soc. Edin. III., 

 212; Carr. and Pears. Exs. No. 278; Cooke 

 Hep. f. 150. Cololejeunia, Spruce. 



On Limestone rocks. 



Very delicate and minute, so as scarcely to be 

 visible to the naked eye, loosely 

 and divaricately branched. Leaves 

 ovate acuminate, echinulate and 

 denticulate with the projecting cells 

 (fig. 27), falcate, decurved, sinuately 

 complicate at the base, the fold 

 saccate, ovate, twice as short as 

 the leaf. Involucral leaves bifid, 

 the laciniae entire. Perianth on a 27. 



very short lateral branch, pear-shaped or clavate, 

 acutely five-angled, the long margins echinulately 

 muricate. (Plate i,fig. 6.) 



Lejeunia ulicina, Taylor. 

 Dioicous, very minute, stems thread-like, 



D 2 



