110 MOSSES AND LIVERWORTS 



leaves are bi-lobed that is to say, each leaf con- 

 sists of two portions or lobes, a smaller and a 

 larger one; a feature which, as we shall find, 

 characterises many individuals of the group. 

 This particular one is easily distinguished owing 

 to the fact that a narrow band of long, pale cells 

 extends up the centre of the leaf, giving the 

 appearance of a somewhat indefinite nerve. I 

 shall have occasion to refer again to this when 

 dealing more in detail with liverwort leaves. 

 At Plate X. fig. 15 is a magnified leaf, the so- 

 called pseudo-nerve being all the more distinct. 



The Inflated Liverwort (Jungermannia itiflata, 

 Plate VIII. fig. 4) is a small plant that grows 

 very freely on boggy and peaty soil, often form- 

 ing large, dull, reddish brown tufts of considerable 

 size. Here again the leaves are two-toothed, but 

 each tooth, instead of being pointed, is rounded 

 off at the end. Eig. 5 is a small piece of a tiny 

 plant, the Creeping Liverwort (Lepidozia reptaiis), 

 which lives on rotting tree trunks, or on the 

 ground, not unfrequently covering it with a thick 

 green carpet, which when examined with the glass 

 is seen to be made up of numberless thread-like 

 stalks matted together, each of them bearing at 

 intervals the minute three- or four-toothed leaves 

 as shown in my illustration. Let us examine a 

 piece of it still more carefully, and we shall find 

 that on the under side of the stem, and growing 

 quite close to it, are a number of still more 



