68 BRYACE^. [Dicranum. 



* Plants small^ taiony yellow: capsule short-pedicellate^ en- 

 larged at the orifice wheyx dry ; teeth very hygroscopic^ 

 radiate-spreading when dry. 



1. D. fulvellum, Smith. Moncecious: densely piilvinate ; 

 stems slender, 1 c. m. long : leaves falcate-secund, concave, 

 oblong at base, subulate-canaliculate to the obscurely serrulate 

 apex ; costa percurrent ; perichrotial leaves sheathing to the 

 middle, lanceolate, long setaceous-tubulose above : capsule 

 small, ovate-oblong, erect or slightly cernuous, with a short 

 equal collum, smooth, constricted under the broad orifice when 

 dry ; lid obliquely short-beaked ; teeth split into two unequal 

 long-subulate segments ; annulus double. — Fl. Brit. iii. 1209 ; 

 Schimp. Syn. 77 ; Braithw. 1. c. 141, t. 19, G. Arctoa fulvella, 

 Bryol. Eur. t. 86 ; Sulliv. Mosses of U. States, 19. 



Hab. On wet black soil in alpine regions, and in fissures of rocks; 

 highest mountains of New England and New York. 



'&' 



* * Plants larger, many times dichotomoxis, prostrate at base : 

 leaves close, falcate: capside cernuoxis with strumose collum: 

 flowers monoecious. 



2. D. Starkii, Web. & Mohr. Plants green, cespitose: 

 leaves setaceous-subulate from an ovate-lanceolate base, entire, 

 falcate-secund, crisj^ate when dry ; cells of the areolation linear 

 nearly to the base, square-inflated at the angles : caj^sule cylin- 

 drical-oblong, more or less arcuate, obscurely striate ; lid subu- 

 late, long-beaked ; annulus double, large. — Bot. Tasch. 189 ; 

 Bryol. Eur. t. 64 ; Braithw. Brit. Moss-Fl. i. 144, t. 20, C. 



Hab. Alpine regions, in fissures of rocks and on the ground ; White 

 Mountains {Oakes, James); Eocky Mountains {Brununond, Muse. Am. 

 n. 83). 



3. D. falcatum, Hedw. Differs from the last in its more 

 compact growth, the leaves more regularly and strongly falcate, 

 dark green passing to black, obscurely denticulate at the apex, 

 not crispate when dry, with alar cells smaller and scarcely or 

 not at all inflated : the capsule is shorter, thick, inflated or 

 gibbous, not striate, with a shorter pedicel ; peristome dark 

 purple ; annulus simple, narrower. — Sp. Muse. 150, t. 32 ; 

 Bryol. Eur, t. 65 ; Braithw. 1. c. 143, t. 20, B. 



Hab. Same as the preceding. 



4. D. Blyttii, Bruch & Schimp. Tufts loose, dusky green ; 

 stems erect, divided into fragile slender branches : leaves erect 



