GRIMMIEI. 237 



ing every way, rarely subsecund, suberect when dry, elongato- 

 lanceolate, blunt; margin revolute; nerve with two lamellae at 

 the back ; fruitstalk curved ; sporangium oval, furrowed when 

 dry ; ring large ; teeth long and bifid. Hook, fy Wils. t. xix. ; 

 Evg. Bot. t. 1990. ; (Moug. $ Nest. n. 214). 



On moist, quartzose, mostly alpine rocks. Bearing fruit in 

 April and May. 



Forming olive-green or brownish depressed patches. Stem 

 2-4 inches long, decumbent at the base, and naked ; 

 leaf-cells narrow and sinuous ; fruitstalk rather short ; veil 

 mostly five-lobed below; teeth long, at first united above, 

 barred. 



This species agrees with Racomitrium in all except the curved 

 fruitstalk, and is, I think, rightly associated with it by Schim- 

 per. The cells are minute and sinuoso-quadrate above, oblong 

 and rectangular below, exactly as in R. sudeticum. 



75. GRIMMIA, Ehr. 



Sporangium erect or more or less pendulous, on a straight 

 or curved fruitstalk ; veil mitriform or cucullate ; peristome 

 single, of sixteen rather large, lanceolate, externally trabecu- 

 late, bi-trifid teeth, rarely wanting ; columella not deciduous, 

 shrinking into the ripe sporangium ; leaf-cells dot-like, larger 

 and diaphanous below. 



1. Fniitstalk straight, 

 a. Veil lobato-cucullate. 



1. G. atrata, Mielich. ; dioicous; pulvinate, erect; leaves 

 erecto-patent, curved, twisted when dry, linear-lanceolate, 

 elongated, keeled; margin reflexed ; sporangium suberect, 

 elliptico-oblong ; ring large; lid conical; veil submitriform. 

 Hook. Wils. t. xliv.; Eng. Bot. t. 277}, f. 1. 



