MACOUN.] CATALOGUE OP CANADIAN PLANTS. 241 



short incurved, acute acumen, crowded, loosely appressed when dry, 

 not decurrent, not distinctly chlorophyllose ; basal cells hyaline, 

 dilated (the inner sometimes yellowish) thick-walled, the alar large 

 sub-rectangular, well-defined, the other longer and narrower ; auricles 

 excavate ; costa indistinct or short and double. Dioecious. Female 

 plants not found. 



On old logs in woods, Dow's swamp, Ottawa, Ont., September 16th, 

 1889. (Macoun.) 



Subgenus IX. LIMNOBIUM, Bruch & Schimp. 



(898.) H. palustre, Huds. ; Lesq. & James, Mosses of N. America, 

 398; Canadian Musci, No. 356 ; Drumm. Muse. Bor.-Am., No. 195. 



Upon rocks in rivers ; common. (Drummond.) On rocks in brooks, 

 Never's Eapids, Queen's Co., N.B. (J. Moser.) On stones in Jupiter 

 River, Anticosti ; on stones in Fox Eiver and in Ste. Anne des Monts 

 River, Gasp^ Co., Que. ; on rocks below Jones Falls, near Owen 

 Sound, Ont. ; on stones Black River, Lake Nepigon ; also on rocks in 

 Current River, near Port Arthur, Lake Superior ; on stones in Swift 

 Current Creek, Assiniboia ; in a ravine on Sulphur Mountain, at 

 Banff, Rocky Mountains ; on stones in a brook, Roger's Pass, Selkirk 

 Mountains ; in a brook at Deer Park, Columbia River ; in a creek at 

 Spence's Bridge, B.C. (Macoun.) On wet rocks summit of Mount 

 Queest, Cold Range and up the North Thompson River, B.C. (J. M. 

 Macoun.) 



(899.) H. Columbico-palustre, C. M. &Kindb. (n. sp.); Canar 

 dian Musci, No. 493. 



Diflfers from Hypnum palustre in the leaves being longer-apiculate, 

 faintly denticulate, the margins recurved below at one side, the alar 

 cells dilated, well-defined, the costa stout, vanishing above the middle. 



On rocks at the mouth of the Illicillewaet Canon, near Revelstoke, 

 B.C., May 18th, 1890. (Macoun.) 



(900.) H. dilatatum, Wils.; Canadian Musci, No. 357. 



IT. {Limnobium) molle, Lesq. & James, Mosses of N. America, 399 ; 

 Drumm. Muse. Bor.-Am., No. 194. 



On stones in Gull River, "Victoria Co., Ont. ; on stones in brooks 



along the north shore of Lake Superior ; abundant on stones in the 



Kamanistiquia River, below Kakabeka Falls, west of Lake Superior ; on 



rocks in the stream that discharges the Asulcan Glacier, Selkirk 



16 



