1908.] TREES AND SHRUBS. 581 



Aii infusion of the leaves of this plant is sometimes used as a sub- 

 stitute for tea. 



Ledum palustre Linn. Narrow-leaved Labrador Tea. 



On the Barren Grounds and in the northern part of the wooded 

 country a very narrow-leaved Ledum is common. Typical specimens 

 were taken in a muskeg at Fort Norman, where the species was 

 growing beside the broad-leaved L. grosnlandicum. It was similarly 

 observed at Fort McPherson. A specimen in flower taken by E. S. 

 Jones on Richards Island in June, 1904, is also typical of this form. 



The Tyrrell brothers collected specimens at various points between 

 Daly Lake and Chesterfield Inlet in 1893, and J. W. Tyrrell found 

 it near Artillery Lake in 1900. It appears also in the list of speci- 

 mens collected by Dease and Simpson on the Arctic coast to the east- 

 ward of the Coppermine in the summer of 1839. 



Rhododendron lapponicum (Linn.) Wahl. Lapland Rose Bay. 



This beautiful species was common near Leith Point, where speci- 

 mens not long out of flower were taken on August 31, 1903. During 

 the following summer I found it common at Fort Good Hope, where 

 it was in full flower on June 21. Mr. G. A. Ball gathered specimens 

 on the summit of Bear Rock, near Fort Norman, on the same 

 date; and E. S. Jones gave me specimens from Richards Island, 

 taken in late June. 



It is apparently common on the Barren Grounds. It was found 

 at Dubawnt Lake in 1893 by the Tyrrell brothers, and on Artillery 

 Lake in 1900 by J. W. Tyrrell; it appears also in the list of plants 

 collected by Dease and Simpson on the Arctic coast east of the Cop- 

 permine in 1839. 



Kalmia glauca Ait. Swamp Laurel. 



This pretty species was not noted south of Smith Landing, though 

 it undoubtedly occurs farther south. It was a common and conspicu- 

 ous species in the muskegs at that place about the middle of June, 

 being then in full flower. I found it common also on upper Grandin 

 River in August, 1903. 



It apparently extends north to the Barren Grounds, having been 

 found near Fond du Lac, Athabaska Lake, and at Daly Lake, by the 

 Tyrrells in 1893, and on Hanbury River by J. W. Tyrrell in 1900. 



Cassiope tetragona (Linn.) D. Don. Four-angled Cassiope. 



This Arctic shrub is abundant on the semibarren shores near Leith 

 Point, where a few flowers still persisted on the stems at the end of 

 August. It is found far northward through the Barren Grounds. 

 The Tyrrells collected it at Dubawnt Lake in L893, and J. W. Tyrrell 

 took it on Hanbury River in L900. Dease and Simpson collected it 

 at Fort Confidence and on the Arctic coast east of the Coppermine. 



