1908. 



TREES AND SHRUBS. 



519 



is a good-sized tree. North of this point I have no authentic data 

 as to its occurrence. 



Juniperus sabina Linn. Creeping Juniper. 



This trailing shrub grows mainly on gravelly banks and rocky 

 ledges throughout the forested belt. It occurs in a dwarfed state on 

 the semibarren shore of Great Bear Lake near Leith Point. Tt as- 

 cends to the summit of the mountains near the mouth of Xahanni 

 River to an altitude of over 2,000 feet, and, according to Richardson, 

 reaches an altitude of 1,000 feet within the Arctic Circle. To the 

 eastward of our routes the species was found by the Tyrrell brothers 

 as far north as Carey Lake. (See fig. 16.) 



Fig. 16. — Creeping juniper i.//n(//» <».v sabina), Fori Chipewyan, 



Juniperus nana Willd. Low Juniper. 



This is a common shrub throughout the wooded region, occurring 

 principally on dry ground, and ascending the mountains to timber- 

 line. It was found by the Tyrrell brother- on the north shore of 

 Carey Lake. Like the preceding species ii is usually loaded with 

 fruit in the spring. 



Populus balsamifera Linn. Balsam Poplar. 



The balsam poplar inhabits the entire length of the Athabaska, 

 Slave, and Mackenzie rivers, reaching it- greatest perfect ion of habit 

 on the Athabaska, Slave. Peace, and Liard rivers. On the Macken- 



