214 HANDBOOK OV BRITISH MOSSES. 



Oedbe XIX. BTTXBAITMIEI, Br. & Schimp. 



Sporangium slipper- shaped, oblique, stalked or sessile ; veil 

 short, conical ; peristome a conical membrane, surrounded by 

 layers of cellular tissue divided into irregular teeth, or a 

 rudimentary filmy ring. 



65. DIPHYSCITJM, Web. $ Mohr. 



Sporangium nearly sessile, oblique, ovate, gibbous below; 

 veil mitriform or cuculliform ; spore-sac attached to the wall 

 by threads ; peristome a conical, rather twisted membrane with 

 sixteen folds, thickened at the angles, surrounded by a very 

 narrow filmy ring. 



1. D. foliosum, Web. fy Mohr; stem very short; leaves 

 linear ; veil mitriform. — Hook. §• Wils. t. viii. ; Eng. Bot. t. 

 329 ; (Plate 19, fig. 5) ; Moug. §■ Nest. n. 37. 



On shady banks in subalpine countries, or on moist rocks. 

 Bearing fruit in summer. 



Dioicous, or according to some authorities monoicous ; occur- 

 ring in broad patches. Plants more or less scattered, scarcely 

 more than \ of an inch high; leaves spreading, slightly incurved, 

 more or less acute ; nerve reaching nearly to the apex ; peri- 

 chsetial leaves divided above into jointed cilia ; nerve excurrent ; 

 sporangium buried in the leaves ; lid conical, acuminate. The 

 leaves consist of two strata, the upper easily separating from 

 the lower, and having smaller cells. 



66. BTJXBATJMIA, Hall. 

 Sporangium large, oblique, flat above, gibbous below, apophy- 

 sate ; veil small, cylindrico-campanulate ; peristome a conical, 

 plicate, membrane, slightly twisted when dry, surrounded by 

 three or four layers of cellular tissue divided into irregular 

 teeth ; leaves rudimental. 



