SALICACE^E 



185 



early deciduous pubescence, becoming bright yellow or dark orange color, and in 

 their second year dark red-brown and much roughened by the conspicuous leaf-scars. 

 Winter-buds ovate, acute, nearly terete or slightly flattened, with narrow lateral 

 wing-like margins, light or dark orange color, glabrous or pilose at the base, about 

 ^' long. Bark thin, dark brown slightly tinged with red, and divided into broad flat 

 ridges. Wood light, soft, close-grained, light brown tinged with red, with thick 

 nearly white sapwood. 



Distribution. Borders of mountain streams usually at high elevations; southern 

 Assiniboia and the banks of the Columbia River in British Columbia, southward 

 throufh the Rocky Mountain region to northern New Mexico and Arizona; in Cali- 

 fornia on the Sierra Nevada and on the San Bernardino Mountains as a low shrub 



up to elevations of 10,000 above the sea. In the Pacific coast region from Alaska 

 to Santa Barbara, California, represented by the var. brachystachys, Sarg., a tree 

 sometimes 70 high, with a tall trunk often 2-^' in diameter, stouter branches, larger 

 pubescent winter-buds, larger obovate leaves, and rather shorter pistillate aments; 

 the most abundant Willow of western Washington and Oregon, and of its largest 

 size in swamp and bottom-lands near the shores of Puget Sound. 



18. Salix amplifolia, Cov. Willow. 



Leaves revolute in the bud, oval to broadly obovate, rounded or broadly pointed 

 at the apex, gradually or abruptly narrowed at the cuneate base, dentate-serrulate 

 or entire, densely villous when they unfold, with long matted white hairs, at maturity 

 nearly glabrous, pale yellow-green above, slightly glaucous bejow, 2'-2' long, !'-!' 

 wide, with midribs broad and hoary-tomentose toward the base of the leaf and thin 

 and glabrous above the middle; their petioles slender, tomentose. Flowers : aments 

 appearing about the middle of June, stout, pedunculate, tomentose, on lateral leafy 

 bniiH-hlets, the staminate l'-2' long and shorter than the pistillate, their scales 

 oblanceolate or lanceolate, dark brown or nearly black, covered with long pale hairs; 

 stamens 2, with slender elongated glabrous filaments; ovary ovate-lanceolate, short- 

 stalked, glabrous or slightly pubescent, gradually narrowed into the elongated slender 

 style crowned with a 2-lobed slender stigma. Fruit ovoid-lanceolate, glabrous, 

 short-stalked, \' long. 



