8ALICACEJE 175 



ovary narrowly cylindrical, long-stalked, elongated, glabrous, with nearly sessile 

 emarginate stigmas. Fruit cylindrical, about ^' long, lustrous. 



A tree, occasionally 25 high, with a short trunk 6'-8' in diameter, erect branches 

 forming a broad round-topped symmetrical head, and stout glabrous branchlets dark 



orange color and lustrous in their first season, becoming darker and more or less 

 tinged with red the following year; usually smaller and shrubby in habit. Winter- 

 buds narrowly ovate, acute, light orange-brown, lustrous, about \' long. Bark thin, 

 smooth, dark brown slightly tinged with red. 



Distribution. Banks of streams and swamps ; Newfoundland to the shores of 

 Hudson's Bay and northwestward to the valley of the Mackenzie River and the 

 eastern base of the Rocky Mountains, southward to southern Pennsylvania and west- 

 ward to eastern Nebraska; very abundant at the north, rare southward. 



**Stamens 2- aments terminal and axillary. 



8. Salix fluviatilis, Nutt. Sand Bar Willow. 



Leaves involute in the bud, linear-lanceolate or often somewhat falcate, gradually 

 narrowed at the ends, long-pointed, dentate, with small remote spreading callous 

 glandular teeth, 2'-6' long, \'-$ f wide, when they unfold coated below with soft lus- 

 trous silky hairs, at maturity thin, glabrous, light yellow-green, darker on the upper 

 than on the lower surface, with yellow midribs, slender arcuate primary veins, and 

 slender reticulate veinlets, their petioles grooved, \'-\' long; stipules ovate-lance- 

 olate, foliaceous, about ^' long, deciduous. Flowers: aments on stout peduncles 

 covered with soft silky pale pubescence, the pistillate oblong-cylindrical, about 1' long, 

 \' broad, terminal or axillary on short or elongated lateral branches, the staminate 

 cylindrical, elongated, 2' or 3' long, about \' broad, terminal on leafy branches; their 

 scales obovate-oblong, entire, erose or dentate above the middle, light yellow-green, 

 densely villous on the outer surface, slightly hairy on the inner; stamens 2, with free 

 filaments slightly hairy at the base; ovary oblong-cylindrical, acute, short-stalked, 

 glabrous or pubescent, with large sessile deeply lobed stigmas. Fruit light brown, 

 glabrous or villous, about \' long. 



A tree, usually about 20 high, with a trunk only a few inches in diameter, spread- 



