HANDBOOK OF BRITISH HEPATIC/E. 41 



374, t. 96, f. 2. ; Gott. and Rab. Exs. 47, 273, 

 435; Carr. and Pears. Exs. No. 135, 195; 

 Cooke Hep. fig. 152, 153. 



var. a planiuscula, Lindb. 



var. y heterophylla, Carr. Irish Crypt. Bran- 

 ches attenuate, microphyllous ; lobule obso- 

 lete ; leaves plane, variously shaped, distant. 



On wet shady rocks, 

 var. /? cavifolia, Lindb. 



On trunks and amongst moss. (Fr. Ap. May.) 



Growing in rather large patches, stems to f inch, 

 thread-like, flexuous, irregularly pin- 

 nate, branches mostly simple. 

 Leaves rather closely imbricated, 

 bifarious (fig. 31) somewhat two- 

 lobed, upper lobe by far the largest, 

 horizontal, ovate, slightly convex, the 

 base beneath ventricose, where the 

 upper lobe rises, which perhaps is 

 only a dilated and involute portion 

 of the margin. Colour pale yellow 

 green. Perichaetial leaves of different 

 figure, from the rest, much larger, 

 deeply divided into two oblong- 

 ovate, obtuse, and slightly convex 31. 

 lobes, which closely embrace the calyx, the upper 

 three times the size of the lower. Stipules roundish, 



