MACouN.] CATALOGUE OP CANADIAN PLANTS. 153 



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

 Collected in Eastern Gri*eenland 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 Eiver at Castle 

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

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

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

 (Nelson.) Jakobshavn. {M. Brown.) Common in Greenland. (Fl. Gr.) 



(586.) P. graciie, Menz. ; Lesq. & James, Mosses of N. America. 



264 ; Canadian Musci, No. 478. 



New Harbor, Newfoundland. (Bev. A. Wagkorne.) Miquelon Island, 

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

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

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

 Belleville, Ont. ; on earth and rocks in Eoger'sPass, Selkirk Mountains, 

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

 feet. (Macoun.) Kotzebue Sound. (Both. AlasJe.) 



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

 America, 264 ; Canadian Musci, No. 429. 



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

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

 on rocks at Eevelstoke, and logs at Hastings, B.C. (Macoun.) Sitka 

 Island, Alaska. 1891. (J. M. Macoun.) Alaska. (NeUon.) 



(588.) P. Ohioense, Een. & 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 ; lamellse 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, ofien 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 



