MACOUN.] CATALOGUE OF CANADIAN PLANTS. 153 



(584.) P. polare, C. Muell, Bot. Zeit. 205. 1859. 

 Collected in Eastern Greenland and on Sabine Island. (Pansch.) 



87. POLYTRICHUM, Linn. 



(585.) P. sexangulare, Floerke ; Bull. Torr. Bot. Club, XVI., 96 ; 

 Canadian Musci, No. 428. 



On the summit of Copper Mountain, south of the Bow Elver at Castle 

 Mountain, Rocky Mountains ; on Mount Cheops, Selkirk Mountains, 

 alt. 7,500 feet, B.C. ; also on the Gold Range, north of Griffin Lake, 

 B.C., alt. 7,000 feet. (Macoun.) Herald Island, north of Alaska. 

 (Nelson.} Jakobshavn. (E. Brown.) Common in Greenland. (Ft. Grr.) 



(586.) P. gracile, Menz. j Lesq. & James, Mosses of N. America. 



264 ; Canadian Musci, No. 478. 



New Harbor, Newfoundland. (Rev. A. Waghorne.) Miquelon Island. 

 (Delaware.) Bogs near St. Andrews, N.B. (Hay.) Canaan Forks, 

 N.B. (J. Moser.) North shore of Lake Superior. (Agassis.) Mer 

 Bleue, 12 miles from Ottawa, Ont. ; on earth near the Gravel Pit, 

 Belleville, Ont. ; on earth and rocks in Roger's Pass, Selkirk Mountains, 

 B.C. ; on earth, Gold Range, north of Griffin's Lake, B.C. ; alt. 7,000 

 feet. (Macoun.) Kotzebue Sound. (Roth. Alask.) 



(587.) P. formosum, Hedw. ; Lesq. & James, Mosses of N. 

 America, 264 ; Canadian Musci, No. 429. 



Miquelon Island. (Delaware.) [Bay Bull Arm, Newfoundland. 

 (Eev. A. Waghorne.}'] (?) On earth in woods, Pelee Point, Lake Erie ; 

 on rocks at Revelstoke, and logs at Hastings, B.C. (Macoun.} Sitka 

 Island, Alaska. 1891. (J. M. Macoun.} Alaska. (Nelson.) 



(588.) P. Ohioense, Ren. & Card. ; Coult. Bot. Gaz. XIIL, 199 ; 

 Canadian Musci, No. 221. 



Stem erect, simple or bipartite, 3-6 cm. long, a little tomentose 

 below. Leaves spreading when moist, erect, flexuous when dry, from 

 a sheathing base linear-acuminate, cuspidate, serrate ; lamellae about 

 50, each in section of a row of 5-7 cells, the marginal one much larger, 

 transversely dilated, about twice broader than high, very slightly 

 convex, often almost plane. Perichetial leaves longer with a longer 

 hyaline base. Pedicel 4-8 cm. long, reddish below, pale above. 

 Capsule erect, finally horizontal, tetragonal or pentagonal, rarely 

 hexagonal, acute-angled, rather narrowed toward the base, with a very 



