114 MOSSES AND LIVERWORTS 



liverworts owing to the presence of a row of 

 large square-shaped cells round the margin of 

 the leaf, which at once strike one as something 

 uncommon. 



Eig. 12 is another very small plant (Lejeunea 

 ulicina), which is not often met with, though, 

 again, this may he partly due to its minuteness, 

 and partly to the fact that it grows among mosses, 

 and is thus not easily distinguished. It generally 

 prefers the trunk of a tree for its habitation. 

 The Two-horned Liverwort (Cephalozia bicuspi- 

 data, fig. 13) belongs to a family of diminutive 

 plants which usually live on the ground, or creep 

 among the stems and leaves of mosses. This 

 one is the commonest, and its long, slender 

 white, thread-like stems may be found creeping 

 on wet clay soil by the roadside, though, owing 

 to its minute size, it will certainly not be dis- 

 covered without the help of a glass. It affords 

 yet another instance of a plant with two-toothed 

 leaves. 



In the Globe-fruited Liverwort (Jungermannia 

 sphcerocarpa, fig. 14) we have another round- 

 leaved plant. This is also a frequent denizen of 

 damp, shady nooks, producing its fruit which, 

 as indicated by its name, is round, instead of oval, 

 in form in the early spring. Eig. 15 is a 

 beautiful moisture-loving little plant, which has 

 been named Hutchins' Liverwort (Jubula Hut- 

 chinsia), after Miss Hutchins, a famous Irish 



