216 GEOLOGICAL AND NATURAL HISTORY SURVEY OF CANADA. 



acute or shoi't-pointed, auricled, not plicate nor reflexed on the borders, 

 entire or slightly denticulate at the apex ; upper cells long and narrow, 

 the alar very distinct, quadrate, inflate and hyaline ; costa very short 

 thick and simple, or none. Capsule curved ; lid short, conical ; pedicel 

 smooth. MoncEcious. 



Differs from P. denticulatum principally in the smaller crowded 

 leaves and their areolation. 



On stones in McKay's woods, Ottawa, Ont., May 2l8t, 1 885. (Macoun.) 



(813.) P. aciculari-pungens, C. M. &Kindb. (n. sp.) 



Dioecious. Tufts dense, radiculose, depressed, glossy green. Stem 

 irregularly divided ; branches few and short, not attenuate. Leaves 

 concave, open-orect or patent, decurrent, entire, ovate-oblong with a 

 short needle-shaped, recurved or patent point ; margins narrowly 

 recurved below to the middle at one side ; areolation uniform and 

 dilated ; the angular cells large and not numerous, sub-rectangular ; 

 costa none or indistinct. Capsules not found. Habit of Pla^iothecium 

 SuUivantice. 



This species is nearly allied to Plagiothecium sylvaticum, but the 

 leaves are smaller, the tufts more compact, &c. 



On earth, Canaan Forks, Queen's Co., N.B., 1889. (J. Moser.) 



(814.) P. undulatum, Bruch & Schimp. Bryol. Europ. 



Hypnum undviatum, Linn. ; Lesq. & James, Mosses of N. America, 369 ; 

 Canadian Musci, No. 314. 



Abundant on logs in woods at Hastings, B.C. ; also common at 

 Comox, Vancouver Island. {Macoun.) On logs. Queen Charlotte 

 Islands ; also on logs, Battledown Island, Gulf of Georgia, B.C. 

 (^Dawson.') Sitka. {Hoth. Alask.) Sitka and Prince of Wales Island, 

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



127. AMBLYSTECIUM, Schimp. 



(815.) A. minutissimum, (Sulliv. & Lesq.) 



Hypnum mmutissimum, Salliv. & Lesq. ; Lesq. & James, Mosses of N. 

 America, 371 ; Canadian Musci, No. 54L 



On rocks, North Hastings, Ont. ; on earth at the outlet of Lake 

 Louise, Eocky Mountains ; also on earth at Eevelstoke, Columbia 

 Eiver, B.C, {Macoun.) 



