264 HANDBOOK OF BRITISH MOSSES. 



sporangium oval-oblong ; lid conico-rostellate ; basal mem- 

 brane very narrow. Hook, fy Wils. t. xxxiii. ; Eng. Bot. t. 

 2381. ; Grev. Sc. Crypt. Fl. 1. 127. ; (Moug. fy Nest. n. 913.) 



Highlands of Scotland. Rare. Bearing fruit in summer. 



Monoicous ; densely csespitose. Leaves in themselves green, 

 but glaucous from excessively minute threads mixed with a 

 granular substance similar to what occurs in Barlramia pul- 

 verulenta. The leaf-cells are broader and more rectangular 

 than in the other species, but very unlike those of Tortula. 

 The nature of the glaucous matter is unknown, but it does 

 not appear to be any condition of a Mould or Lichen, but to 

 be thrown off from the surface of the plant. 



84. DIDYMODON, Br. fy Schimp. 



Sporangium erect, subcylindrical, with a very short tapering 

 base ; veil cucullate, covering at least half the sporangium ; 

 peristome rather sho*t ; teeth sixteen, linear-lanceolate, of a 

 double row of cells, tender and fugacious, entire or perforated ; 

 leaf- cells narrow. 



1 . D. rubellus, Br. fy Schimp. ; tufted ; leaves spreading 

 and recurved, crisped when dry, lanceolate from an amplexicaul 

 base ; margin recurved ; nerve reaching almost to the tip ; 

 sporangium cylindrical ; lid shortly and obliquely rostrate ; 

 teeth entire or cloven. Hook, fy Wils. t. xiv. ; Eng. Bot. t. 

 1438. 



On shady walls, on the ground, etc. Bearing fruit from 

 October to February. 



Monoicous and synoicous ; forming dull-green patches, 

 which are red below. Ring simple ; leaf-cells above minute, 

 filled with chlorophyll, below rectangular and hyaline, much 

 resembling those of Tortula ; teeth of peristome pale, lanceo- 

 late, entire, with a medial line and projecting at the articula- 



