374 LESKEACE/E. 



Leskea pofycarpa usually fruits abundantly, and may thus be easily recognised from 

 all the preceding species of pleurocarpous mosses, none of which, except perhaps 

 Leucodon sciurotdes, which is dioicous and rarely fruits, have such narrow, elongated 

 capsules. The short, scarcely acuminate leaves, almost always slightly secund, give 

 it a characteristic facies. It is a difficult plant to gather in good condition, being 

 often much coated with muddy deposit. The small, whitish calyptra gives it some- 

 what the appearance, when the fruit is young, of Amblyslegium serpens. Slender 

 forms occur occasionally, but as a rule it is not a variable plant. 



Myrinia pulziinata has a much shorter capsule, short nerve, etc. 



2. Leskea nervosa Myrin (Pterogonium nervosum Schwgr.). 



(Tab. L. G.). 



Very slender, stems irregularly branched and re-branched ; 

 branches filiform, straight ; bright or brownish green ; leaves 

 densely imbricated, erecto-patent, closely appressed when dry so 

 that the branches are terete, very small, widely ovate, rapidly 

 tapering to a long, finely acuminate point ; margin recurved 

 below, entire; nerve vanishing in the acumen near apex; median 

 cells irregularly oval, marginal shorter, rounded, or transversely 

 elliptic, all small, incrassate, lightly papillose, hardly altered at 

 base. Seta short ; capsule erect, sub-cylindric, small ; peristome 

 small, processes shorter than the teeth. Dioicous. 



Hab. Trunks of trees and rocks in subalpine districts. Very rare ; Scotland. 

 Fruiting very rarely, in summer. 



A much more delicate plant than the last, with filiform stems and branches and 

 very differently shaped leaves. Pseudoleskea atrovirens differs in the colour, the wider 

 and larger leaves, which are usually secund ; Lescurcea striata in the smooth, denticu- 

 late leaves ; Anomodon longifolius in the more elongated, straggling habit, and the 

 leaves denticulate, much more loosely imbricated and more distant ; all the other 

 species with which it might be confused differ in the elongated areolation or shorter 

 nerve. 



95. ANOMODON Hook. & Tayl. 



Primary stems stoloniform, with very small leaves differing 

 from those of the secondary stems and branches ; secondary stems 

 erect or ascending, irregularly branched. Leaves ovate or 

 lanceolate, single-nerved ; cells more or less rounded, highly 

 papillose on both sides. Fruit produced on the erect secondary 

 stems. Capsule erect, symmetrical. Cilia of inner peristome 

 none or rudimentary. Dioicous. 



fLs. narrow, acuminate i. longifolius 



\Ls. more or less obtuse or apiculate 2 



("Slender; Is. apiculate, often serrulate at apex 2. attenuatus 



\ Robust; Is. entire, more or less obtuse .j. viticulosus 



