242 HANDBOOK OF BRITISH MOSSES. 



short, mammillary ; ring narrow ; teeth pale-red, perforated, 

 trifid, distinctly barred ; veil cucullate. Hook, ty Wils. t. 

 xliv. ; Eng. Bot. t. 2888.; (Moug. $ Nest. n. 910.) 



On calcareous rocks and walls. North Wales and Bristol. 

 Bearing fruit in spring. 



Differing from G. pulvinata, which sometimes has a similar 

 lid, in its large compact tufts, longer stems, broader leaves, 

 cucullate veil, yellow fruitstalk, and subspherical, smaller, red 

 sporangium, which is even except when dry. The leaf-cells 

 at the angles are large as in the last species. 



12. G. pulvinata, Smith ; monoicous ; pulvinate ; leaves 

 elliptico-lanceolate, suddenly attenuated and hair-pointed, 

 keeled ; margin recurved ; sporangium oval, furrowed ; fruit- 

 stalk curved ; veil mitriform, lobed at the base ; lid rostrate ; 

 ring large, dehiscent ; teeth red, densely barred. Hook, 

 Wils. t. xiii. ; Eng. Bot. t. 1728. ; (Plate 21, fig. 5) ; Moug. $ 

 Nest. n. 710. 



On walls, stones, etc. Very common. Bearing fruit a 

 month later than the last. 



Forming glaucous-green cushions, but not so compact or 

 so thick as in the last. Leaves broader; sporangium distinctly 

 striate; teeth longer, more or less spreading, and not con- 

 verging when dry. A variety occurs with a shorter stem, a 

 blunter lid, and more perforated jagged teeth. 



76. SCHISTIDIUM, Br. fy Schimp. 



Sporangium immersed; veil mitriform, multifid at the 

 dilated base ; columella adhering to the lid and falling away 

 with it ; peristome single, of sixteen lanceolate teeth, barred 

 transversely without any medial line, often more or less 

 perforated above. 



Schimper, in his Synopsis, reduces all again to a subgenus 

 of Grimmia. 



