528 NORTH AMERICAN FAUNA. [no. 27. 



mens taken on the summit of Bear Rock, near Fort Norman, on 

 June 21. 

 •J. W. Tyrrell took specimens on Artillery Lake in 1900. 



Dryas drummondii Richardson. Drummond Mountain Avens. 



Specimens just out of flower were taken by Alfred E. Preble and 

 Merritt Cary on the summit of the Nahanni Mountains, near the 

 mouth of that river, on July 16, 1903. 



Rosa acicularis Lincll. Wild Rose. 



This beautiful rose occurs abundantly throughout the timbered 

 region. About the post clearings, and in favorable places on the river 

 banks, it forms dense thickets, which in July are resplendent with 

 pink flowers. Their color seems to increase in intensity northward. 



In 1903 the first flowers were seen on Slave River, 90 miles below 

 Fort Smith, on June 16, and the shrub was in full flower on the 

 shores of Great Slave Lake about the first of July (PL XXV, fig. 2). 

 Along the canoe route north of Great Slave Lake it is abundant, and 

 it was seen occasionally along the southern shore of Great Bear Lake. 

 It is abundant along the Mackenzie, ascending nearly to the summit 

 of the adjacent mountains, and extending northward to the delta. Its 

 leaves were just unfolding at Fort Norman on June 11, 1904, and it 

 was in flower at Fort Good Hope on June 21. 



Mr. E. S. Jones informed me that on Richards Island it grows to a 

 height of 3 feet and forms thickets. 



A species of rose with slender reddish branches, practically un- 

 armed, is rather common along the Athabaska and on the road south 

 of Athabaska Landing, but the species has not been determined. 



Amelanchier alnifolia Nutt. Serviceberry. 



This shrub, whose berries arc used extensively by the various tribes, 

 especially through the southern part of its range, is a common species 

 along the Athabaska and Slave, and extends northward nearly to the 

 limit of the woods. It flowers, even as far north as the upper Mac- 

 kenzie, about the first week in June, and ripens its fruit in August. 

 Along the canoe route between Great Slave and Great Bear lakes it 

 occurs usually as a low shrub and does not produce much fruit. Its 

 berries were ripening along Grandin River on August 3. 



The Tyrrell brothers collected this shrub at the" Northwest Angle " 

 of Athabaska Lake — near the most northern point on the lake. 



Prunus pennsylvanica Linn. f. Red Cherry. 



This is the common wild cherry of the region. It is common along 

 Athabaska and Slave rivers and about the great lakes into which they 

 flow. Along the Athabaska its sour and scarcely edible fruit ripens 

 about the middle of August. I did not detect it north of Great Slave 

 Lake, although it probably ranges farther north. 



