MAOOUN.] 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-wa/lled, 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, USTo. 356 ; Drumm. Muse. Bor.-Am., No. 195. 



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

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

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

 Eiver, Gasp6 Co., Que. ; on rocks below Jones Falls, near Owen 

 Sound, Ont. ; on stones Black Eiver, Jjake Nepigon ; also on rocks in 

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

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

 Banif, Eocky Mountains ; on stones in a brook, Eoger's Pass, Selkirk 

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

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

 Queest, Gold Eange and up the Worth Thompson Eiver, B.C. (J. M. 

 Macoun.') 



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

 dian Musci, No. 493. 



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

 faintly denticulate, the mai'gins 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 Eevelstoke, 

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



(900.) H. dilatatum, Wils.; Canadian Musci, No. 35'7. 



TT. {LimnoUum) molle, Lesq. & James, Mosses of N. America, 399 ; 

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



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

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

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

 rocks in the stream that discharges the Asulcan Glacier, Selkirk 



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