176 GEOLOGICAL AND NATURAL HISTORY SURVEY OP CANADA. 



(663.) H. sericeum, (Linn.) Bryol. Europ. ; Canadian Musci, No. 

 549. 



Hypnum sericeum, Drumm. Muse. Bor.-Am., No. 169. 



Stem pinnate, creeping. Branch-leaves narrow, ovate-lanceolate, 

 shortdecurrent, long-subulate or filiform-acuminate, plicate, faintly 

 denticulate nearly all around or subentire ; margins scarcely reflexed ; 

 cells narrow, the alar quadrate ; costa long, vanishing in the base of 

 the acumen. Perichetial leaves scarcely plicate, attenuate to a filifoim 

 point. Capsule erect, sub-cylindric, straight or slightly curved ; teeth 

 pale, segments short, basilar membrane high, to one-third of the 

 segments j cilia none ; annulus broad ; pedicel rough, 1-2 cm. long. 

 Dioecious. 



On the bark of trees at Michosen, 16 miles from Victoria, Vancouver 

 Island, April 16th, 1887 ; very abundant on rocks at Banff and in the 

 " Dry Canon" at Devil's Lake, Eocky Mountains. (Macoun.) Bocks 

 among the Rocky Mountains. (Dnimmond.) 



III. ENTODON, C. Mueller. 



(664.) E. acicularis, C. M. & Klndb. (n. sp.) 



Tufts compact, brown-yellow or variegate with green. Stem much 

 divided, very radiculose ; branchen very short and turgid, not attenuate. 

 Leaves imbricate, with difficulty loosed from the stem, scarcely open 

 when moist, finally golden-yellow, from the ovate-oblong base suddenly 

 narrowed to a fine aciculiform or subulate point, denticulate nearly all 

 around ; cells not chlorophyllose, linear-lanceolate or fusiform, the 

 alar not well defined ; costa generally wanting. Barren. 



On rocks in McKay's woods, near the lake, at Ottawa, May 2nd, 

 1885 ; also by an old lime-kiln at Brittania, six miles west of Ottawa, 

 October, 1890. {Macoun.') 



(665.) E. cladorrhizans, (Hedw.) C. Muell. 



Neckera dadorrhizans, Drumm. Muse. Bor.-Am., No. 160, in part. 

 Cylindrothedum cladorrhizang, Schimp. ; Lesq. & James, Mosses of N. 

 America, 311 ; Canadian Musci, No. 263. 



Entocbn {Cylindrothedum) dadorrhizans Hedw., differing from the 

 European E.\Schleicheri (Schimp.) in the broad annulus of the capsule 

 which is very imperfectly described by Lesq. & James (page 311.) 

 It merits therefore a more complete description of the plant. 



Tufts dense but loosely cohering. Stem pinnate ; branchlets alter- 

 nate. Leaves ovate-oblong, obtusate with a very short, often recurved 

 point, subentire or slightly denticulate above, often faintly striate ; 



