48 MR, W. MITTEN—BRYOLOGIA 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 subintegerrt- 
mo levibus, inde marginibus argute dentatis, dorso laminis denti- 
formibus nervo lamellato percurrente parallelis, nervo etiam dorso 
lamellis circiter tribus serratis carinato, foliis inferioribus oblongis 
obtusioribus, perichzetialibus e basi oblonga convoluta sensim angus- 
tatis lanceolatis, theca in pedunculo elongato cylindracea curvata 
basin versus ventricosa. 
Hab. Grande Cóte, Rocky Mountains, Drummond, intennixed with 
Oligotrichum aligerum. 
Size and habit of A. undulatum, Linn., but capsules more ven- 
trieose 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 levi 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, perl 
chztialibus caulinisque perichzetium versus e basi obovata vaginante 
erecta cellulis elongatis pellucidis areolata subulatis angustioribus 
ezterum caulinis similibus, theca in pedunculo elongato eylindracea 
inferne ventricosa curvata, calyptra apice pilis paucis hirta. 
Hab. Grande Cóte, 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 
lamelle on the underside of the leaf itself, as wellas upon both 
sides of the nerve, is remarkable and peculiar. 
PoaoxaTUM, Brid, 
P. ALPINUM (Dill.). ; 
Hab. Between Fort Colville and Cascade Mountains, British Columbia, 
Lyall. 
