1/2 The Ottawa Naturalist. [December 



Larix Lyallii, Parlat. 



Mr. Walter D. Wilcox found this tree in 1898 on Mt. 

 Hector, about 1 1 miles from Laggan, Rocky Mts. This station 

 extends the limit of P. Lyallii some 3 or 4 miles further north 

 than it was known to occur. Mr. Wilcox was also on the moun- 

 tains at Glacier Lake, head of Saskatchewan River, and at the 

 source of the Athabasca, but did not see this larch, so that its 

 northern limit may now be considered to be definitely fixed. 



Calamovilfa longifolia, (Hook.) Hack. 



Ammophila longz'folia, Benth. and Hook. ; Macoun, Cat. 

 Can. Plants, vol. iv, p. 208. 



Not rare on sandy ground in the northern part of Lamb- 

 ton Co. and southern part of Huron Co., Ont. (J. Dearness.) 

 Eastern limit in Canada. 



Elymus elymoides, (Raf.) Sweezy. 



One specimen collected by Prof Macoun in 1897 on the 

 side of a mountain at Crow Nest Pass, Rocky Mts. New .to 

 Canada. 



