194 HANDBOOK OF BRITISH HEPATIC^. 



Jungermannia Pearsoni, Spruce Journ. Bot., 

 Feb., 1 88 1, p. 33; Carr. and Pears. Exs. No. 

 165, 239. 



On wet rocks. (Plate 4, fig. 57-} 



Dioicous, small, depressedly caespitose, lurid 

 green, resembling Cephalozia divaricata. Stem 

 8 mm. long, flaccid, twice, or rarely more, fur- 

 cate, radicles very rare. Leaves distant, rarely con- 

 tiguous, transverse, broadly wedge-shaped, compli- 

 cately keeled, bifid three-quarters down, keel making 

 a broad angle with the stem ; segments suberect, 

 nearly parallel to the stem, rather plane, ovate, 

 subacuminate, acute or rather obtuse ; cells 

 minute, subquadrate. Andraecia placed in the 

 middle of the stem or branch ; bracts few, three to 

 four, larger than the leaves, crowded, base turgid, 

 sometimes with an antical incurved tooth ; anthe- 

 ridia large, solitary on long pedicels. 



Jungermannia orcadensis, Hook. 



Stem erect, nearly simple ; leaves bifarious, 

 incumbent, appressed or rather spreading, 

 ovate, obtusely emarginate, margin revolute ; 

 stipules none. 



Jungermannia orcadensis, Hook. Br. Jung. t. 

 71 ; Gott. and Rabh. Exs. No. 40, 399, 400; 

 Cooke Hep. f. 76 ; Carr. and Pears. Exs. 245. 

 Mesophylla orcadensis, Dumort. Hep. Eur. 

 p. 130. 



