174 GEOLOGICAL AND NATURAL HISTORY SURVEY OP CANADA. 



and wide-mouthed ; segments free, longer than the teeth ; lid conic, 

 short-apiculate ; pedicel 1.5 cm. long. Monoecious. 



This species resembles Platygyrium repens (or rather some forms of 

 Hypnum cupressi forme), but it differs in the monoecious inflorescense 

 and the denticulate leaves. 



It agrees with Pylaisia Selwynii in the recurved leaf-borders, differs 

 in the narrower leaves and the narrow capsule. It differs also from 

 Pylaisia subdenticulata in the larger and more crowded leaves and 

 larger capsule ; from Hypnum reptile in the peristome, the basal cells 

 not being yellow, &c. 



On decayed trunks near Nepigon House, Lake Nepigon, July 17th, 

 1884. (Macoun.) 



(655.) P. Selwynii, Kindb., Ott. Nat. II., 156 ; Canadian Musci, 

 , No. 434. 



Differs from P. intricata in the denser, darker green tufts, the leaves 

 broader, short-acuminate, reflexed to the acumen at one border or at 

 both, the short alar and marginal cells more numerous, the capsule 

 short-oval, the segments adhering to two-thirds of the teeth, 



Yery abundant on old cedar fences along the Richmond Road, three 

 miles west of Ottawa, Oct. 12th, 1885. (Macoun.} 



(656.) P. Ontariensis, C. M. & Kindb. (n. sp.) 

 P. intricata, Canadian Musci, No. 262, in part 



Agrees with Pylaisia intricata in the leaves being ovate-lanceolate- 

 subulate-acuminate, subentire, with numerous and quadrate alar cells, 

 the oblong-ovate capsule, the segments adhering to and bordering the 

 lower half of the teeth, split above and cohering at the apex; differs in 

 the branchlets being distant, not crowded, the leaves broader, shorter, 

 acuminate with more dilated cells, the lid of the capsule obtuse, not 

 rostellate, peristomial teeth broader, spores smaller. 



On earth at the bases of trees, Ste. Anne des Monts River, Gaspd Co., 

 Que., August 24th, 1882 ; also along Lake Nepigon. 1884. (Macoun.) 



(657.) P. filari-acuminata, C. M. &"Kindb. (n. sp.) 



Agrees with Pylaisia velutina in the leaves being filiform-acuminate, 

 but the acumen is distinctly denticulate, often twisted, the alar cells 

 more numerous, the capsule thicker, oblong, the peristomial teeth 

 nearly free from the segments. Lid not found. 



On logs subject to inundation west side of the Columbia River at 

 Eevelstoke, B.C., May 3rd, 1890. (Macoun.} 



