48 MR. W. MITTEN — BRY0L0GIA OF THE SURVEY 



Atrichum, Beauv. 

 A. undulatum (Linn.). 

 Hab. Fort Colville, Lyall. 



A. parallelum, sp. nov. Dioicum ?, caulibus breviusculis, in fertili- 

 bus foliis superioribus ligulato-lanceolatis, basi pro spatio oblongo 

 inferne cellulis oblongis superne rotundatis areolato subintegerri- 

 mo laevibus, inde marginibus argute dentatis, dorso laminis denti- 

 formibus nervo lamellato percurrente parallelis, nervo etiam dorso 

 lamellis circiter tribus serratis carinato, foliis inferioribus oblongis 

 obtusioribus, perichaetialibus e basi oblonga convoluta sensiui angus- 

 tatis lanceolatis, theca in pedunculo elongato cylindracea curvata 

 basin versus ventricosa. 



Hab. Grande Cote, Rocky Mountains, Drummond, intermixed with 

 Oligotrichum aligerum. 



Size and habit of A. undulatum, Linn., but capsules more ven- 

 tricose below. Intermixed with the fertile stems are others of 

 about the same height, having the leaves all short and with a ter- 

 minal bud, which appears to be young male inflorescence, but too 

 young to be safely considered such. The parallel disposition of 

 the tooth-like processes on the back of the leaf and the cristate 

 nerve suffice to distinguish this species from A. undulatum, for 

 which it was overlooked by Drummond. 



Oligotrichum, DeCand. 



O. aligerum, sp. nov. Caule breviusculo, foliis patulis e basi brevi 

 paululo latiore oblonga lsevi integerrima cellulis quadrato-rotundatis 

 distinctis viridibus areolata lanceolatis obtusiusculis brevi-dentatis 

 dorso lamellis dentatis longitudinalibus alatis, nervo percurrente lamel- 

 lato dorso etiam lamellis circiter quinis dentatis carinato, peri- 

 chsetialibus caulinisque pericheetium versus e basi obovata vaginante 

 erecta cellulis elongatis pellucidis areolata subulatis angustioribus 

 cseterum caulinis similibus, theca in pedunculo elongato cylindracea 

 inferne ventricosa curvata, calyptra apice pilis paucis hirta. 



Hab. Grande Cote, Rocky Mountains, Drummond. 



In size and general appearance like O. hercynicum, for which 

 species it was overlooked by Drummond himself; but its leaves 

 are narrower, and when dry more crisped, and the presence of the 

 lamella on the underside of the leaf itself, as well as upon both 

 sides of the nerve, is remarkable and peculiar. 



Pogonatum, Br id. 

 P. alpinum (DHL). 



Hab. Between Fort Colville and Cascade Mountains, British Columbia, 

 Lyall, 



