SALICACE^E 



179 



Distribution. Cold wet bogs; coast of Labrador to northern Maine, northern 

 New Hampshire and New York, and westward to the valley of the Saskatchewan, 

 and to northern Michigan and Minnesota; known to become arborescent only near 

 Fort Kent on the St. John River, Maine. 



12. Salix lasiolepis, Benth. White Willow. 



Leaves involute in the bud, oblanceolate to lanceolate-oblong, often inequilateral 

 and occasionally falcate, gradually or abruptly wedge-shaped or rounded at the base, 

 acute or acuminate or rarely rounded at the apex, entire or remotely serrate, pilose 

 above and coated below with thick hoary tomentum when they unfold, at maturity 

 thick and subcoriaceous, conspicuously reticulate-venulose, dark green and glabrous 

 above, pale or glaucous and pubescent or puberulous below, 3'-6' long, '-!' wide, 

 with broad yellow midribs and slender arcuate veins forked and united within the 

 slightly thickened and revolute margins; their petioles slender, ^'-^' long; stipules 



ovate, acute, coated with hoary tomentum, minute and caducous, or sometimes foli- 

 aceous, semilunar, acute or acuminate, entire or denticulate, dark green above, pale 



