158 -GEOLOGICAL SURVEY OF CANADA. 



Var. muscorum, Koerb. 



' Chiefly on mosses in alpine and arctic regions. 



Islands in Behring Strait. (IVrig-Ztt.) On moss at the bases ot 

 trees, Salt Lake, Anticosti, Que. ; on earth in woods at Banff, 

 .Rocky Mountains, 1891. {Macoun.) 



Var. achrista, Sommerf. 



On trees and shrubs. 



On bark of trees along Lake Winnipegosis, and on Moose 

 Mountain, Man., July, 1880; on cherry bark at Old Wives' Creek, 

 Assa., May, 1895 ; on poplar bark along Jumping Pound Creek, 

 Rocky Mountains, June, 1897. {Macoun.) 



Var. pilularis, DC. 



On limestone rocks along the Rideau River near the Hogsback, 

 May 7th, 1897 ; at Aylmer, Que., April, 1900. {Macoun.) 



441. L. vorticosa, Koerb. 



On alpine and arctic granitic rocks. - 

 Arctic America. {Fries.) 



442. L. pycnocarpa, Koerb. 



Granitic rocks. Island of Grand Manan, N.B. ( IVilUy.) 



443. L. arctica, Sommerf, 



Upon mosses in alpine and arctic regions. 



Greenland. {Vahl.) Islands in Behring Strait. (}Vright) 



444. L. planetica, Tuckerm. var. perfecta, Eckfeldt. 



On limestone shingle at Britannia, near Ottawa, Ont,, April 

 20th, 1895. {Macoun.) 



445. L. limosa, Ach. 



On naked earth in alpine and arctic regions. 

 ^Greenland and Arctic America. {Fries.) 



