CATALOGUE OF CANADIAN PLANTS. 5! 



Canada. (A. T. Drummond.) Arctic America. (Hooker?) 

 Abundant on trees at the Big Intervale, Margaree River, Cape 

 Breton Island, N. S.; near Ironsides on the road to Chelsea, Que.; 

 on small trees, and branches, Lake Nipigon, Ont; on small 

 trees, Hastings, Burrard Inlet, B.C. ; on willows, Burnside Road, 

 Victoria, Vancouver Island. (Macoun.) 



4. R. dilacerta, HOFFM. 



R. minuscula, f . pollinariella, NYL. 



Eagle River, L'Anse au Mort, and Blanc Sablon, Labrador ; on 

 branches of trees, Middle Arm, Newfoundland. (Waghorne.) 



5. R. pollinaria, (WESTR.) ACH. 



Bay of Exploits, Newfoundland. (Waghorne.) Unalaska Island, 

 Behring Sea. (/. M. Macoun.) 



6. R. polymorpha, ACH. 



Quite common on trees in the Maritime Provinces. 



On rocks, Newfoundland. (Dcspreaux.) On dead balsam fir 

 at Baddeck, Big Intervale and Louisburg, Cape Breton Island, 

 N. S. ; Jupiter River, Anticosti ; Brackley Point, Prince Edward 

 Island ; Little Chlorodorme, Gaspe Co. Que. ; on old fence posts 

 and boards Sable Island, N. S., July 27, 1899. (Macoun.) On 

 islands in Behring Strait. (Wright.) On rocks St. Paul Island, 

 Behring Sea. (/. M. Macoun.) 



?. R. cuspidata, ACH. 



A specimen referred here was collected on St. Paul Island, 

 Behring Sea, Aug i8th, 1892, by Mr. J. M. Macoun. The plant is 

 perfectly smooth, polished and shining. There is no sign of 

 soredia and the apothecia is lateral. (No. 615.) On June 19, 

 1897, other specimens were collected on St. Paul Island by Mr. 

 Macoun and referred here by Prof. Branth. 



2. CETRARIA (AcH.) FR. 



8. C. tristis, (WEB.) FR. 



Alpine rocks. Arctic America. (Richardson.) On rocks, Digge's 

 Island, Hudson Strait, 1885. (Dr. R. Bell.) On rocks, summit of 



