CATALOGUE OF CANADIAN PLANTS. 275 



acuminate, denticulate at least above the middle. Capsule 

 lanceolate-cylindric, small mouthed ; teeth pale ; segments as 

 high with a distinct basal membrane ; lid apiculate ; pedicel 

 twice longer than in A. nervosus. 



1122. A. tectorum, Al.'Braun. 



On rocks, Greenland. {Berggren fide Ki?idberg.) On rocks, 

 Moose Mountain alt. 7500 feet. Elbow River, Rocky Mountains, 

 July, 1897- {Macoun.) On rock in rather dry places, lakes 

 Lebarge and Dawson, Yukon. {Williams.) 



1123. A SUbrigidulus, Kindb., Bryol. N. Am. & Eur., 11. 



Differs from A. tectorum in the leaves being more distinctly 

 recurved to the short acumen ; middle cells round-oval ; costa 

 generally reaching to the acumen. Stem irregularly divided, not 

 creeping. Capsule and lid as in A. tectorum ; peristome not seen. 



On rocks on the coast of Labrador. {Waghorne.') 



108. PLATYGYRIUM, Bruch & Schimp. 

 ■651. P. repens, Bruch & Schimp. 



On old logs, Golden Lake, Ont., Sept. 27th, 1900. {Macoun^ 



109. PYLAISIA, Bruch & Schimp. 

 '652. P. polyantha, (Schreber) Bruch & Schimp. 



On trees at Credit Fqrks, and Edmonton, Ont., Oct., 1893. 

 {Jas. White.') On old logs. Big Intervale, Margaree, Cape Breton 

 Island, N.S., July, 1898 ; on old logs. Otter Slide Creek, Algonquin 

 Park, Ont., 1900 ; also at Golden Lake, Ont., 1900 ; on t e bases of 

 trees in woods. Elbow River, Rocky Mountains, July, 1897. 

 {Macoun.) Sheep Camp, Dyea Creek, on wood, Alaska ; at the 

 bases of trees at Dawson. {Williams?) 



Var. rupestris, Best, N. var. 



In thin loose mats, deep to dark green; stems prostrate, irregu- 

 larly branched; stem leaves ovate-lanceolate, narrowly acuminate, 

 subcomplanate, f Icato-secund, spreading-incurved, entire, costa 

 ■obsolete, "25 to '35 mm. wide, '6 to '9 mm. long ; median leaf cells 

 linear-rhomboidal, 4 to 6 times as long as wide; alar cells pale, 

 i8>^ 



