APPENDIX E 333 



* Saxifrage tricuspidata Rottb. Last woods, east shore, Artil- 



lery Lake, August 6; near Caribou Island, Great Slave 

 Lake, July 21. 



Common on the dry banks and moss-clothed rocks of Great 

 Slave Lake. 



* Ribes triste Pall. Fort Smith, Mackenzie, June 21. 



* Ribes hudsonianwn Richards. Fort Smith, Mackenzie, June 



21; near Caribou Island, Great Slave Lake, July 21. 



* Ribes setosum Lindl. Fort Smith, Mackenzie, June 21. 



* Rubus strigosus Michx. Near Caribou Islands, Great Slave 



Lake, July 19. 



This species is quite generally distributed north to near the 

 limit of trees. It is of good size along the Athabaska, but is 

 dwarfed toward its northern limit. 



Rubus arcticus Linn. 



This tiny single-fruited raspberry grows in the drier muskegs 

 in the wooded country, but reaches its highest perfection on the 

 Barren Grounds. Some of the plants bore ripe berries on Artil- 

 lery Lake on September 3, while others were still in flower. 



Rubus chamamorus Linn. 



This baked-apple berry has a range similar to that of the pre- 

 ceding. We noted it in flower on Caribou Island on July 20. 

 Its fruit was ripe on Artillery Lake on September 2. 



* Potentilla multifida L. Fort Smith, Mackenzie, July 3. 



* Potentilla quinquefolia Rydb. Near Caribou Island, Great 



Slave Lake, July 18; Caribou Islands, Great Slave Lake, 

 July 21. 



* Potentilla fruticosa L. Near Caribou Islands, Great Slave 



Lake, July 19. 

 Rather common in suitable places north to the limit of trees. 



