HANDBOOK OF BRITISH HEPATICJE. 79 



Plants stipulate, rarely without stipules, leaves 

 incurrent, divided. 



" The species of this genus are a standing puzzle 

 to hepaticologists. They are all so alike in habit, 

 and in their more obvious characters, that a casual 

 observer would unhesitatingly refer them to the 

 same genus ; but when we try to define the species, 

 we find it difficult to assign them positive limits." 

 Spruce Hep. Amaz. p. 368. 



Bazzania trilobata, Linn. 



Stem creeping, branched, leaves imbricate, 

 convex, ovate, apex truncate, three-toothed, 

 stipules broadly quadrate, three to five toothed, 

 six times shorter than the leaves. 



Jungermannia trilobata, Linn. Sp. 1599. 

 Hook. Br. Jung. t. 76 ; Gott. and Rab. Exs. 

 1 8, 280. Jungermannia radicans, Hoffm. Eng. 

 Bot. t. 2232. Mastigobryum trilobatum, Nees 

 Syn. Hep. 231; Cooke Hep. f. 125. Pleuro- 

 chisma trilobatum, Dumort. Syll. Jung. p. 70. 

 Bazzania trilobata, Carr. and Pears. Exs. No. 

 39, 187. 



In mountainous districts. 



Growing in large dense patches, sometimes ex- 

 ceeding a foot. Stems 3 to 5 inches long, creeping 

 horizontally upon the ground, sometimes simple, 

 innovant, at others dichotomously branched, 

 brownish. Flagellae about an inch long, from the 



