60 GEOLOGICAL SURVEY OF CANADA. 



4. USNEA, (Dill.) Ach. 



35. U. sulphurea, (Mull.) Th. Fr. 



On rocks, Greenland. (/. Vahl.) Rocks, Arctic America ; 

 dwarfed and sterile, Melville Island. {Parry's 2nd voyaged 



36. U. barbata, (Linn.) Fr. var. florida Fr. 



The variety or form, hirta, is very common, but florida is rare 

 in Canada. On dead wood, North West Arm, Halifax, N.S., June 

 20th, 1883. {Macoun.) 



Specimens, without fruit, very glaucous and nearly smooth, have 

 been collected on trees in Crow's Nest Pass, Rocky Mountains, 

 alt. 4,000 feet, Aug., 1897, ^"d on Douglas fir at Comox, Van- 

 couver Island, May 3, 1887. The latter were referred to typical 

 U. barbata by Dr. Eckfeldt. 



Var. birta, Fr. 



Very common on trees and old fences. 



On a sandy point in the Bay of St. George, Newfoundland. 

 {Waghorne.) On trees, Bass River, Kent Co., N.B. {Prof. Fowler.) 

 On dead branches, Rigaud Mountain, Vaudreuil Co., Que. 

 (Rev. G. Ducharme.) On spruce trees at Edmonton, Ont. {James 

 Wkiie.) On trees at Truro, N.S.; on trees, Brackley Point, 

 Prince Edward Island ; on spruce trees, Cape Breton Island, N.S., 

 but rare ; on trees and old fences at Ottawa, Ont.; on fence-rails 

 Belleville and Brighton, Ont.; on balsam fir, Algonquin Park, 

 Ont., June, 1900 ; on trees. Lake Nipigon, Ont.; on trees, Mani- 

 toba House and Porcupine-Mountains, Man.; on trees at Morley, 

 foothills of Rocky Mountains ; on spruce trees, C. P. R. station, 

 Banff, and at Jumping Pound Creek, Rocky Mountains ; on 

 branches and trunks, Deer Park, Lower Arrow Lake, Columbia 

 River, B.C.; on oak trees around Victoria, Vancouver Island. 

 (Macoun.) 



Var. rubiginea, Michx. 



On trees at Round Lake, Ottart^a Co., Que. {D'Urban.) On 

 trees in a swamp near Belleville, Ont. {Macoun.) On spruce 

 trees at Edmonton, Ont. {James White.) 



