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. ; 

 Eng. Bol. 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, a.t 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. G-RIMMIA, 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. VrwtsiaTk 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. 2771, f. 1. 



