lo The Ottawa Naturalist. [Octpl;^r 



wfien dry very much crisped, when moist subarcuate, short attenuate 

 to the acute apex ; boiders revolute above the base, for the greater 

 part, at least on one side, distinctly papillose, also at the back ; cells al 

 basal wings sub-quadrate hyaline with incrassate transverse walls, those 

 ja^xt the. costa narrower, rectangular, in straight rows, the lowest orange ; 

 costa pale, sub-percurrent. Male flower at the side of the female. Inner 

 perigonial leaves broad, short-ovate, obtusate or suddenly short-acum- 

 inate ; cells round only in the acumen, the others narrow, the lower 

 basal wider and yellow ; antheridia about 9, with several paraphyses, 

 Perichetial leaves with sublinear basal cells. Capsule dark-brown short 

 s.ubovoid, not contracted at the mouth, costate ; pedicel short, scarcely 

 emergent. Calyptra densely hairy. 



This species is a true Ulota, although the revolute leaf-borders, the 

 distinctly papillose cells and short pedicellate capsule are more like an 

 Orthotrichum, 



0,\ csAdiX ixces {Thuya occidentalis) in Dow's Swamp, September 

 i6th, 1886. 



Both the preceding species are believed to be forms of U. crhpp, 

 by Mrs. E. G. Britton, who has made a special study of the genus. 



XIX. ORTHOTRICHUM, rlledw. 



54. O. anotnalum, Hedw. 



On rocks and ledges along the Ottawa at Governor's Bay, Rock- 

 clifife Park ; also on ledges near McKay's Lake, in 'fruit April 22nd, 

 .1896. Fruiting. 



55. O. speciosum, Nees. 



Common on balsam fir, cedar and spruce trees in the woods east 

 of Beaver Meadow west of Hull, Que. ; also on spruce trees in Rock- 

 cliffe Park ; collected on trees and fence rails near Hintonburg, April 

 13th, 1896. Fruiting. 



56. O. sordidum, SuUiv. and Lesq. 



Common on beech trees in woods near Ironsides, Que. ; collected 

 on trees in Rockcliffe Park and Beech wood Cemetery, April 22nd, 

 1896. Fruiting. 



57. O Ohioense, SuUiv. and Lesq. 



On trunks in woods near Leamy's L^ke, Hull, Que. ; old fence rails 

 at Carleton Place ; collected on trees in woods near Governor's Bay, 

 Rockcliffe Park, 'April 22nd, 1896. Fruiting. 



58. O. Canadense, Bruch and Schimp. 



This species appears in Part VI under 0. Schimferi but was dis- 

 covered by Mrs. E.. G. Britton when monograpbjr^ the genus some 



