DICRANEI. 285 



slightly toothed above; nerve vanishing at the tip; sporan- 

 gium oval, sometimes elongated, even, not sulcate when dry ; 

 teeth of peristome small, divided to the base. — Hook. §■ Wils. 

 t. xxxiv. ; Eng. Bot. t. 2356, 2509 ; Grev. Sc. Crypt. Fl. t. 

 193. ; (Plate 23, fig. 9) ; Moug. # Nest. n. 406. 



In crevices of alpine rocks. Bearing fruit in early summer. 



Monoicous ; forming soft pale-green tufts or cushions, re- 

 sembling Weissia cirrata. Distinguished at once from the 

 next by its even sporangium. 



I. Teeth striate. 



2. C. polycarpum, Br. fy Schimp.; stem radiculose ; leaves 

 crowded, spreading or subsecund, linear-lanceolate from an 

 oblong base, crisped when dry, toothed above, obscurely papil- 

 lose ; sporangium oblong, equal, deeply furrowed when dry ; 

 teeth rather irregular. — Hook, fy Wils. t. xviii. ; Eng. Bot. t. 

 1977, 2269, 2279. ; {Moug. §■ Nest. n. 414.) 



On alpine rocks. Bearing fruit in early summer. Scotland, 

 Wales, and north of England. 



Monoicous ; forming green tufts. Leaves bent, twisted when 

 dry, but less so than in the last species ; sporangium symme- 

 trical, more or less strumous at the base ; teeth deeply cloven 

 or perforated, striated like those of true Dicranum ; the leaf- 

 cells are just those of the last species. 



3. C. virens, Schimp. ; caespitose ; stems elongated, dicho- 

 tomous ; leaves lanceolato-subulate from an oblong base ; mar- 

 gin recurved; sporangium oblong, curved, cernuous, even, 

 distinctly strumous; lid rostrate. — Hook. §■ Wils. t. xyii. ; 

 Eng. Bot. t. 1462.; {Moug. $ Nest. n. 1115.) 



On moist alpine rocks. Bearing fruit in summer. 

 Forming loose tufts. Stems 1-3 inches high, ascending ; 

 slightly radiculose ; leaves not crisped when dry ; nerve thick, 



