294 HANDBOOK OF BRITISH MOSSES. 



* Dioieous ; leaves nearly straight when dry. 



1. G-. tenue, Schrad. ; tufted ; leaves elongated, linear, 

 acuminate above; perichsetial leaves sheathing beyond the 

 middle ; sporangium oblong ; lid shortly rostrate ; ring rather 

 broad. — Hook. ty Wils. t. vii. ; Eng. Bot. t. 2506. ; (Moug. fy 

 Nest. n. 810.) 



On sandstone rocks, etc. Glasgow and Cheshire. Bearing 

 fruit in summer. 



Forming broad, pale-green patches. Stems very short; 

 leaves somewhat translucent, suberect; nerve ceasing below 

 the apex; margin granulated; leaf-cells minute above, quad- 

 rate or subrotund, gradually more elongated downwards ; 

 mouth of sporangium red, slightly contracted. 



2. G. rupestre, Schwag.; tufted, subpulvinate; stems dichQ- 

 tomous; leaves spreading, assurgent, linear-lanceolate, obtuse 

 or slightly acute ; nerve thick, ceasing below the tip ; sporan- 

 gium oval ; lid conical, with a short beak. — Hook, fy Wils. 

 t. xxxii. ; Eng. Bot. t. 2200. ; (Moug. §• Nest. n. 1102.) 



Crevices of wet alpine or subalpine rocks. Bearing fruit 

 late in summer. 



Forming more or less dense brownish-green cushions. 

 Leaves rather rigid ; sporangium thin, truncated when the lid 

 has fallen ; leaf-cells subquadrate, slightly larger at the base 

 and hyaline ; those of the margin granulated. 



3. G-. curvirostrum, Hedw. ; tufted ; leaves spreading, 

 nearly straight or variously curved, linear-lanceolate, acute, 

 concave below ; margin even, recurved ; sporangium broadly 

 ovate ; lid obliquely rostrate, longer than the sporangium and 

 adhering to the columella. — Hook. &; Wils. t. vi. ; Eng. Bot. 

 t. 2202, 2214. ; (Moug. §• Nest. n. 905.) 



Moist alpine and subalpine rocks. Bearing fruit towards 

 the end of summer. 



