224 GEOLOGICAL AND NATURAL HISTORY SURVEY OP CANADA. 



(840.) H. unicostatum, C. M. &Kindb. (n, sp.); Canadian Musciy 

 No. 590. 



Diifers from Hypnum chrysophyllum in the dense tufts, the stem morfr 

 irregularlj^ branching, creeping, the leaves shorter-acuminate, the alar 

 cells smaller, not yellow, the costa more distinct, the capsule smaller^ 

 the perichetial leaves gradually acuminate-subulate or filiform-pointed 

 with the acumen arcuate. 



At Canaan Forks, Queen's Co., N.B. (J. Moser.) In the Mer Bleue 

 near Ottawa, October 4th, 1890. (Macoun.') At Cataraqui, near 

 Kingston, Out., May 23rd, 1884. C^rof. Fowler.) 



<841.) H. decursivulum, C. M. & Kindb. (n. sp.) ; Canadiar* 

 Musci, No. 514. 



H. Somnierfeltii, Canadian Musci, No. 328, in part. 



Differe from Hypnum chrysophyllum in the leaves being decurrent 

 with a broader base, borders recurved at the angles ; alar cells numer- 

 ous, hyaline. Barren. 



Abundant on old logs in a boggy place under the trestle just east of 

 of Albert Canon Station, Selkirk Mountains, B.C., May 29th, 1890, 

 (Macoun.) Near New Harbor, Newfoundland. (Hev. A. Waghorne.) 



(842.) H. Columbiae, Kindb. 



Amblystegium serpens' Columbite, Kindb. Bull. Torr. Bot. Club. XVII 279.- 



Tufts dense. Stems short, very tomentose, irregularly branching f 

 branches short. Leaves narrower than in Hypnum chrysophyllum, from 

 the narrow-ovate base gradually tapering into the acumen ; borders 

 denticrulate all around, recurved at the angles ; areolation often wide^ 

 as in Amblystegium ; costa short, reaching to the acumen or sometimes 

 longer. Capsule generally smaller and shorter than injff. chrysophyllum^ 

 curved; lid short-apiculate; peristome dark-yellow, not pale ; periche- 

 tial leaves short-acuminate. 



Diifers from H. chrysophyllum in the naiTower, denticulate leaves^ 

 from H. hispidulum and H. Sommerfeltii in the long costa. 



On wet logs near a spring about one mile from Sicamous, B.C., on 

 the road to Enderby, July 19th, 1889. (Macoun.) 



(843.) H. Macounii, Kindb. Bull. Torr. Bot. Club, XVII., 279 j 

 Canadian Musci, No. 522. 



H. Hnlleri, Drumm. Muse. Bor.-Am., No. 191. 



Allied to Hypnum hispidulum. Habit of the European H. Halleri. 

 Monoecious. Plants small, interlaced in dense brownish-green tufts. 



