DICRANEI. 281 



crisped when dry; sporangium erect, striate, without any 

 apophysis; lid long, beaked from a conical base; ring very 

 narrow. Hook, fy Wils. t. xvii.; Eng. Bot. t. 1151. 



On moist sandy soil. Bearing fruit late in autumn. 



Forming little pale-green patches. Stems not i an inch 

 high; sporangium symmetrical; leaf-cells nearly uniform. 



2. D. Grevilleiana, Schimp. ; monoicous, densely tufted ; 

 leaves suddenly lanceolato-subulate from a wide sheathing 

 base, somewhat undulated, spreading; perichsetial leaves 

 sheathing; sporangium cernuous, ovate, somewhat striate, 

 obsoletely strumous ; lid shortly subulate. Hook. Wils. t. 

 xxxiii.; Grev. Sc. Crypt. Fl. t. 116. 



On clayey soil. Scotland. Very rare. Bearing fruit in 

 autumn. 



Forming dense yellowish patches. Differs from D. Schreberi 

 in the longer narrower leaves, broader nerve, monoicous inflo- 

 rescence, subulate lid, etc. Leaf-cells broader and more co- 

 lourless than in D. crispa, slightly narrower than in D. Schre- 

 beri, but more pellucid. 



3. D. Schreberi, Schimp. ; dioicous, gregarious ; leaves 

 keeled, narrowly lanceolate from a half-sheathing base, toothed 

 towards the tip ; perichsetial leaves shortly sheathing ; sporan- 

 gium cernuous, without striae ; ring none ; lid shortly rostrate. 

 Hook. % Wils. t. xxxix. ; (Moug. % Nest. n. 719.) 



On clayey or sandy soil. Scotland and north of England. 

 Bearing fruit in autumn. 



Forming yellow patches. Leaves spreading, perichsetial 

 leaves larger than the rest ; base of sporangium scarcely stru- 

 mous. 



4. D. squarrosa, Schimp. ; dioicous, tufted ; stems elon- 

 gated, dichotomous, radiculose ; leaves oblongo-lanceolate from 

 a sheathing base, quite entire, blunt ; nerve narrow, ceasing 



