Contributions to Canadian Botany. 151 



Salix arbl'sculoides, Andr. 



Specimens of this rare and little known willow were col- 

 lected in 1393 by M>. J. W. Tyrrell on the barren grounds 

 between Lake Athabasca and Chesterfield Inlet. (Kerb. 

 No 1716.) Our only other specimens of this species were 

 collected by Dr. Eichardson. 



Salix balsa.mifera, Barratt. 



Barren grounds between Lake Athabasca and Chester- 

 field Inlet, 1893. (J. W. Tyrrell. Herb. No. 1715.) Not 

 before recorded north of the Saskatchewan. 



Salix Riciiardsoni, Hook. 



One specimen of this rare willow was collected by Mr. 

 J. W. Tyrrell at Chesterfield Inlet Hudson Bay, in 1893. 

 Not before recorded from vicinity of Hudson Bay. 



Salix phyllicipolia, Linn. 



\Ve have specimens of this willow from several stations 

 between Lake Athabasca and Chesterfield Inlet, collected 

 in 1893 by .Mr. J. VV. Tyrrell, so that it is probably com- 

 mon throughout that region. Specimens collected in the 

 vicinity of Hudson Strait by Dr. Robert Bell, and referred 

 to S. chlorophi/lla, Andrs., by Prof. Macoun (Cat. Can. 

 Plants, Yol. I., p. 446), are of this species. 



Ltstera borealis, ICorong, Bull. Ton*. Bot. Club, Vol. 

 XX., p. 31. 

 Stems very delicate, 3-5' high, glabrous below, glandular- 

 nubescent, and with long, silky, scattered hairs among the 

 inflorescence, sheathed by two obtuse, membranous scales 

 at the base; roots thickened, somewhat fleshy; leaves 

 oval, slightly sheathing, obtuse at the apex, 4 "-8" long, 

 2"-4" broad, entire, bearing on the surface a few silky 

 hairs, otherwise very glabrous. Raceme two- or three- 

 flowered. Bracts scarcely 1" long, much shorter than the 

 pedicels. Sepals and petals nearly equal, linear, obtuse, 

 about 2" long, lip 4"-5" long, 2" broad at the obtuse apex, 

 ciliolate above; apical lobes very obtuse, 1" long, the inter- 

 mediate tooth obsolete; basal lobes J" long, very obtuse. 



