MACOUN.] CATALOGUE OF CANADIAN PLANTS. 181 



Leaves crowded, sub-entire, not, or indistinctly, papillose, notdecurrent, 

 from the ovate base narrowed into a shorter, subulate or piliform 

 acumen, falcate also in a dry state, more or less plicate, revolute nearly 

 all around, margins broader below ; cells hyaline, only the lowest basal 

 yellow, all thin-walled, the inner and upper oblong or lanceolate, the 

 other subquadrate ; costa stout, finally yellowish, vanishing in or below 

 the acumen. Perichetial leaves from the base more attenuate, denti- 

 culate at the acumen, nerveless or indistinctly costate. Capsule oblong, 

 sub-erect or inclined, not striate ; peristome orange-colored ; teeth 

 densely articulate without distinct longitudinal lines, subulate, hyaline- 

 bordered, when dry incurved ; segments scarcely shorter or narrower, 

 in the middle pertuse ; basilar membrane very short ; cilia smooth ; 

 pedicel 1.5 cm. long ; spores large, 0.02 mm. Lid and calyptra 

 unknown. Dioecious. 



On rocks in the valley of Elk Eiver, Kocky Mountains, 1883. 

 (Dawson.') 



Yar. denudata, Kindb. (n. var.) ; Canadian Musci, No. 564. 



Stems more rigid, about 10 cm. long, nearly simple, curved only at 

 apex, naked below and not radicant. Barren. 



This variety differs very much in its habit ; it is possible, that the 

 capsule, not hitherto found, also is different so as to form a new species. 



On rocks along the Asulcan Creels near the glacier of that name, 

 Selkirk Mountains, B.C., alt. 6,000 feet, August 7th, 1890. (Macoun.) 



(682.) P. stenophylla, Ken. & Card. Coult. Bot. Oaz. ; Canadian 

 Musci, No. 580. 



Quite common on stems of alder and on stones on damp mountain 

 slopes in Roger's Pass, Selkirk Mountains, August 5th, 1890. (Macoun.) 



(683,) P. radicosa, Mitt. ; Lesq. & James, Mosses of N. America, 

 320. 



Hypnum tenax, Drumin. Muse. Bor.-Am., No. 225, in part. 

 Banks of Portage River, Rocky Mountains. (Drummond.) 

 (684.) P. rigescens, Lindb. Act. Soc. Fenn. X. 247. 



P. radicusa, var. gratilis, Lesq. & James, Mosses of N. America, 320. 

 Hypnum tenax, Drumm. Muse. Bor.-Am., No. 225, in part. 



Banks of Portage River, Rocky Mountains. (Drummond.) 



