

SALICACE^E 153 



i'-j' thick, smooth, dark brown slightly tinged with red and covered with small closely 

 appressed irregularly shaped scales. Wood light, soft, light brown tinged with red, with 

 thin light brown sapwood. 



Distribution. River banks, sand bars and alluvial flats; shores of Lake St. John, 

 Quebec to Manitoba, and southward through western New England to northeastern Vir- 

 ginia, southern Ohio, Indiana and Illinois, w r estern Kentucky, south Tennessee, to the 

 mouth of the Mississippi River, and westward to southwestern South Dakota, southwestern 

 Wyoming, northeastern Colorado, western Kansas and Oklahoma, and northern Texas. 



Fig. 147 



From central and northwestern Texas to northeastern Mexico and southern New Mexico 

 represented by var. angustissima Anders., differing in the absence of a dorsal gland in the 

 male flowers and in the silky pubescence of the young ovary. 



In the northern Rocky Mountains region replaced by var. pedunculata Anders., differ- 

 ing from the type in its narrower linear leaves, glabrous ovaries and longer pedicels of the 

 fruit, and ranging from western South Dakota and northwestern Wyoming, through eastern 

 Montana, Saskatchewan, and Alberta, to the valley of the Yukon River in the neighbor- 

 hood of Dawson. 



A shrubby form with leaves densely covered with silky pubescence (var. Wheeleri Schn.) 

 is distributed from New Brunswick to North Dakota, Nebraska and Beckham County, 

 Oklahoma. 



14. Salix lasiolepis Benth. Arroyo Willow. 



Leaves oblanceolate to lanceolate-oblong, often inequilateral and occasionally falcate, 

 acute or acuminate or rarely rounded at apex, gradually or abruptly cuneate or rounded at 

 base, 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, '-1' wide, with a broad yellow midrib and slender arcuate veins forked and united 

 within the slightly thickened and re volute margins; petioles slender, f |' long; stipules 

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

 ceous, semilunar, acute or acuminate, entire or denticulate, dark green above, pale below, 

 persistent. Flowers: aments erect, cylindric, slightly flexuose, densely flowered, nearly 

 sessile on short tomentose branchlets, 1|' long, the staminate %' thick, and nearly twice as 

 thick as the pistillate; scales oblong-obovate, rounded or acute at the apex, dark- 

 colored, clothed with long crisp white hair?, persistent under the fruit; stamens 2, with 

 elongated glabrous filaments more or less united below the middle; ovary narrow, cylindric 



