64 BRYAGEyE. [Dicranella. 



21. DICRANELLA, Schimp. 

 Plants generally small. Leaves smooth; cells of tlie loose 

 areolation slightly chlorophyllose, the upper oblong-hexagonal, 

 the lower long-rectangular. Flowei's dioecious, rarely monoe- 

 cious. Capsule generally cernuous, sometimes striate. Peristome 

 large ; teeth regularly bifid, closely articulate, vertically striolate ; 

 segments filiform, minutely granulose. 



* Leaves squarrose or spreading all around. 



1. D. Crispa, Schimp. Monoecious : plants small, slender, 

 subcespitose : leaves square-ovate, half-sheathing at base, abruj^tly 

 long-subulate, minutely serrulate at the apex, spreading, flexuous, 

 crispate when dry : capsule without collum, erect, short-oval, 

 plicate-ribbed when dry ; lid long-subulate, erect or oblique, 

 crenulate at base ; annulus narrow. — Bryol. Eur. Coroll. 

 13 ; Braithw. Brit. Moss-Fl. i. 105, t. 15, D. Dicramcm oris- 

 pum, Hedw. Stirp. Muse. ii. 91, t. 33 ; Bryol. Eur. t. 55. 



Hab. Near the Highlands, Rocky Mountains, British America (T)rum- 

 mond); Galton Mountains (Lyall)\ McLeod Lake, Canada [Macoun). 



2. D. Grevilleana, Schimp. Monoecious : plants more 

 densely crowded and stronger : leaves enlarged and undulate at 

 the oblong base, abruptly long-lanceolate subulate, entire ; 

 perichsetial leaves with a long tubulose sheathing base : capsule 

 cernuous, obovate or oval, obscurely striate, with a short stru- 

 mose collum ; lid subulate, shorter than in the last species ; 

 annulus none. — Bryol. Eur. Coroll. 13. Dicraniim Schreheria- 

 niim, Grev. Scot. Crypt, t. 116 ; Hook. & Wils., Drumm. Muse. 

 Am. n. 97. Dicranum Gremlleanum, Bryol. Eur. t. 54. Ani- 

 sothecium Grevillei^ Lindb. Utk. Nat. Grupp. Eur. Bladm. 33 ; 

 Braithw. 1. c. 113, t. 16, D. 



Hab. Alpine stations in British America (Brummond). 



It is not certain that this species has been found in America. Accord- 

 ing to Schiraper, n. 97 of Drummond's Mosses represents it, but an ex- 

 amination of the specimens given in three different sets under this num- 

 ber shows that they all represent L>. ISchreberi. 



3. D. Schreberi, Schimp. In size and aspect this species 

 is like the preceding, from which it differs in its dioecious in- 

 florescence, the leaves shorter, carinate above, not as abruptly 

 and narrowly subulate, serrulate toward the apex, and in the 



