MACouN.] CATALOGUE OF CANADIAN PLANTS. 91 



(351.) O. psilothecium, C. M. & Kindb. (n. sp.) 



Plants small, 1 cm. long or less, green. Leaves short oblong- 

 lanceolate, obtusate or short-acuminate, sub-obtuse, revolute at the 

 borders to the greater part, faintly papillose; costa percurrent. 

 •Capsule small, immersed, oblong not striate before sporosis, very short- 

 necked ; vaginula naked ; calyptra slightly hairy at the blackish apex, 

 finally glabrous and light-brown, narrow, covering the whole capsule; 

 lid rostellate. Male flowers on distinct branches. 



This species has the habit of Orthotrichum fallax, Schimp. (0. 

 Schimperi, Hamm.) We have not been able to examine the peristome 

 and the stomata of the capsule, because only one capsule (in our 

 specimens) is nearly ripe, the others are quite unripe. 



On old fences along the Eichmond Eoad, and near Rockcliffe,Ottawa ; 

 also on old fences at Carleton Place. August 26th, 1889. (Macoun.) 



(352.) O. cylindrocarpum, Leeq. ; Lesq. & James, Mosses of N. 

 America, 1*73. 



On rocks at the " Gap," Bow Eiver Pass, Eocky Mountains. 

 {Macoun.) 



(353.) O. psilocarpum, James; Lesq. & James, Mosses of N. 

 America, 1*73. 



On trunks of ti-ees on Pelee Point and Pelee Island, Lake Erie. 

 (Macoun.) 



(354.) O. leiocarpum, Bruch & Schimp.; Lesq. & James, Mosses 

 of N. America, 1Y4. 



0. striatum, Drumm. Muse. Bor.-Am., No. 154. 



Upon trees in Upper Canada (Ontario), and about Lake Superior. 

 {Drummond.) Lake Superior. (Agassiz.) 



(355.) O. pallens, Bruch; Lesq. & James, Mosses of N. America, 

 175. 



Pack Eiver, British Columbia. (Zyall.) 



(356.) O. pulchellum, Brunton Lesq. & James, Mosses of N. 

 America, 175; Canadian Musci, No. 127. 



O. consimile, Canadian Mu8ci, No. 125. 



0. Columbicum, Mitt. Joum. Linn. Sec, VIII., 24. 



On trees, Yancouver Island. (Lyall.) On trees, quite common at 

 "Victoria, Nanaimo and Comox, Yancouver Island ; also on trees both 



