LIVERWORTS 109 



the great variety in size that is to be met with 

 in nature. The Square-leaved Liverwort (Chilo- 

 scyphus polyanthos, fig. 1), one of the larger forms, 

 is a specially moisture-loving plant, which often 

 grows in great abundance in wet, boggy ground, 

 or in the clear water of some small spring which 

 wells up on the hill-side. Its leaves are some- 

 what rectangular in outline, but with the angles 

 rounded off. They are pale green in colour ; and, 

 being formed of large, thin-walled cells, they have 

 that delicate, filmy appearance which, as already 

 pointed out, is so characteristic of many of the 

 liverworts. The Two-toothed Liverwort (Lopho- 

 colea bidentata, fig. 2) is one of the commonest of 

 the tribe. It is by no means particular as to its 

 quarters, and will make itself at home on the 

 hedge bank, on tree trunks, and in other situa- 

 tions, generally, however, seeking a shady position. 

 The name of the plant is, of course, suggested by 

 the shape of the leaf, which is markedly two- 

 toothed, though this form of leaf is by no means 

 restricted to this particular species. In this case, 

 too, the leaf-cells are large and thin-walled, and 

 the plant has a more or less filmy appearance 

 in consequence. The Whitish Liverwort (Diplo- 

 phyllum albicans, fig. 3) is perhaps the most 

 widely distributed of all the leafy liverworts, 

 growing as it does, often in extensive colonies, on 

 the banks by the roadside, in woods, on rocks, 

 and in fact almost anywhere in the country. Its 



