276 HANDBOOK OF BRITISH MOSSES. 



strumous at the base ; ring none ; peristome single, of sixteen 

 bifid internally trabeculate teeth; leaves formed of two or 

 more strata of rectangular pellucid cells, communicating with 

 each other by circular pores, with narrow greener cells im- 

 bedded amongst them ; marginal cells narrow. 



1. L. glaucum, Hampe ; densely csespitose, dichotomous, 

 fragile; leaves spreading or subsecund, lanceolato-subulate 

 from an oval-oblong base, rather obtuse, apiculate ; sporangium 

 cernuous, strumous, furrowed when dry ; lid rostrate. Hook. 

 $ Wils. t. xvi. ; Eng. Bot. t. 2166. ; (Plate 23, fig. 6) ; Moug. 

 $ Nest. n. 23. 



In turbaries, damp places in woods, etc. Bearing fruit, 

 but rarely, in spring. 



Dioicous ; forming large white tufts, with the appearance of 

 Sphagnum. Fruitstalks often two in the same perichsetium. 

 The young male plants nestle in a mass of fibres produced 

 from the upper leaves or the abortive female flowers, and are 

 ultimately developed into a little branchlet. 



94. DICRANUM, Hedw. 



Sporangia aggregate or single in the same perichsetium ; veil 

 cucullate; peristome single, of sixteen bifid trabeculate striated 

 teeth ; leaf-cells linear, generally very narrow, dilated and 

 rectangular at the angles. Handsome tall Mosses. 



1. D. Starkii, Web. fy Mohr. ; monoicous; dichotomous ; 

 leaves subulate from a lanceolate base, irregularly falcate ; 

 sporangium oblong or cylindrical, arcuate, gibbous, strumous 

 at the base, striate ; ring double ; male flower at the base of 

 the female. Hook. $ Wils. t. xvii. ; Eng. Bot. t. 2227. 



On alpine rocks. Bearing fruit in summer. 



Forming large green tufts. Leaves entire ; leaf-cells above 

 narrow, rather flexuous, gradually broader, and more hyaline 



