182 GEOLOGICAL AND NATURAL HISTORY SURVEY OF CANADA. 



(685.) P. falcicuspis, C. M. & Kindb. (n. sp.) ; Canadian Musci, 

 No. 510. 



Plants densely tufted. Stems much bvancliing. Leaves very papillose, 

 denticulate above, short, ovate-lanceolate, attenuate to an acute or 

 filiform, often curved, point, long-decurrent ; margins recurved to or 

 above the middle, not in the upper part ; cells rotundate, at the angles 

 quadrate ; costa vanishing far below the acumen. Dioecious. 



Differs from Pseudoleskea atrovirens principally in the long-decurrent, 

 very distinctly papillose and more denticulate leaves. 



On rocks, west side of Lake Mara, Sicamous, B.C., July 3rd, 1889 ; 

 on rocks at the Illicillewaet Caiion, near Eevelstoke, also at Quesnel, 

 B.C. (Macoun.) 



(686.) P. malacoclada, C. M. & Kindb. (n. sp.) 

 P. catenidata, Canadian Musci, No. 460. 



Plants densely tufted. Stems not rigid, much branching, sparingly 

 radicant without paraphyllia ; branches green or finally fuscescent. 

 Leaves crowded, entire, not decurrent, not distinctly papillose ; the 

 stem-leaves from a concave, broadly ovate or rotundate base suddenly 

 narrowed to the subulate or filiform, recurved acumen ; branch-leaves 

 more attenuate to the subulate and patent point ; basal margins 

 recurved ; cells rotundate, the alar quadrate ; costa very short and 

 double or none. Perichetial leaves closely connivent with a patent or 

 curved acumen ; cells sublin«a,r-lanceolate. Dioecious. 



This species resembles JJeskea nervosa in habit, but is very difiei-ent 

 in its nerveless leaves ; it is rather allied to the European Pseudoleskea 

 catenulata, but is more robust. 



On dry rocks in the ravine west of Murray's Eanche, Spence's 

 Bridge, B.C., Jiay 25th, 1889. CMacoun.) 



115. HETEROCLADIUM,IBruch & Schimp. 



(687.) H. dimorphum, Brid. ; Lesq. & James, Mosses of N". 

 America, 321. 



Nova Scotia. (James.) On rocks, Canaan Forks, Queen's Co., and 

 at Tay, York Co., N.B. (J. Moser.) Greenland. {Fl. Qr.) 



(688.) H. heteropterum, Bruch. ; Canadian Musci, No. 267. 



Hypnum cateniUatum, Drumm. Muse. Bor.-Am., No. 219. 



On damp rocks at Hastings, Burrard Inlet, B.C. ; damp rocks. Gold- 

 stream and Nanairao, Vancouver Island. {Macoun.) Forward Inlet, 



