172 GEOLOGICAL AND NATURAL HISTOET SURVEr OF CANADA. 



west and north of Hull, Que. ; also in McKay's woods at Ottawa ; veiy 

 abundant on limestone ledges all around Owen Sound, Ont. (^Macoun.) 



(650.) A. heteroideus, Kindb. (n. sp.) 



Leskea nigrescens, Kindb. Bull. Torr. Bot Club, XVI., 97 ; Canadian Musci, 



No. 395 and No. 252, in part. 

 L. nervosa var. flagellifera, Kindb. Ott. Nat. Vol. IV. 62. 



Plants densely tufted, groan, finally fuscescent or blackish. Stem 

 creeping, subpinnate, much branching and furnished with numerous 

 small, flagelliform branchlets, densely beset with very small, oblong, 

 obtuse and nerveless leaves; paraphyllia broad. Stem-leaves subdietant, 

 decurrent, appressed when dry, open-erect when moist, from a broadly 

 ovate base suddenly narrowed to a long, subulate or sublinear acumen, 

 entire, faintly papillose ; margins revolute at the base ; branch-leaves 

 more attenuate ; cells round-oval, the marginal of the base quadrate ; 

 costa vanishing below the acumen. Dioecious. Fruiting specimens 

 not found. This species resembles Leskea nervosa in habit. 



On flat limestone rocks and on the roots of trees in McKay's woods, 

 Ottawa ; also on flat limestone rocks in maple woods at Owen Sound, 

 Ont. ; on rocks, " Dry Canon," discharge of Devil's Lake, Eocky 

 Mountains. (itfacoMW.) 



108. PLATYCYRIUM, Bruch & Schimp. 



(651.) P. repens, Bruch & Schimp. ; Lesq. & James, Mosses ofN. 

 America, .307. 



P. repens var. orthocladon, Kindb. ; Canadian Musci, No. 259, in part. ' 

 Neckera sericea, Drumm. Muse. Bor.-Am., No. 159. 

 Pterogonium intricatum, Drumm. Muse. Bor.-Am., No. 75. 



Bale St. Paul, Charlevoix Co., Que. {St. Cyr.) Common on rotten 

 wood at London, Ont. (J. Dearness.) On dead wood, Tobique Eiver, 

 KB. (Hay.^ Tay, York Co., N.B. (J! Moser.) On old logs, Skead's 

 Farm, Ottawa ; and on trees at Peace Eiver, lat. 56°, N.W.T. (^Macoun.) 

 Eocks amongst the Eocky Mountains ; at Portage Eiver ; Beaver 

 Lake and in Upper Canada (Ontario) upon trunks of trees and stones. 

 {Brummond.) 



Var. orthoclados, Kindb. (n. sp ?) ; Canadian Musci, No. 259, 

 in part. 



Branches elongate and not curved. All basal leaf-cells orange. Seg- 

 ments linear, not completely free at base, smooth or denticulate at one 

 side, not shorter than the teeth. 



The European species differs in the peristomial teeth being pale. 



