HANDBOOK OF BRITISH HEPATIC®. 77 



Genus io. PLEUROZIA, Dumort. 



Involucre two-leaved, leaves deeply two- 

 lobed, the upper broad and convolute. Peri- 

 anth long, cylindrical, mouth denticulate, apex 

 plicate and decurved. Capsule four-valved, 

 coriaceous, naked. Elaters geminate, naked, 

 deciduous. — Dumort. Rev. Jung. (1835), A r 5- 

 Physiotium, Nees Eur. Leb. (1838), III., 75. 



Leaves without stipules, lower auriculate, the 

 auricles inflated. 



Pleurozia cochleariformis, Weiss., Dumort. 



Leaves rounded, shell-shaped, convex, bifid 

 at the apex, serrate, auricle oblong-ovate, 

 inflated. Perianth subcylindrical, mouth 

 dentate. 



Lichenastrum alpinum, Dill. Muse. 479, t. 

 69, fig. 1. Jungermannia cochleariformis, Weiss. 

 Crypt. 123; Eng. Bot. t. 2500; Hook. Br. 

 Jung. No. 68. Physiotium cochlea riforme, Nees 

 Eur. Leb. p. 79 ; Carr. and Pears. Exs. No. 

 40, 41 ; Cooke Hep. f. 127, 128. Pleurozia 

 cochleariformis, Dum. Rev. Jung. p. 15 ; Dum. 

 Hep. Eur. p. 52. 



In bogs on Alpine moors. 



Growing in large loosely-tangled patches, many 

 inches broad, stems procumbent, but, when crowded, 

 erect, 4 to 6 inches long, flexuous, simple, or here 



