SALICACE^E 



173 



light yellow, becoming light or dark red-brown and lustrous, and paler orange- 

 brown in their second year. Winter-buds narrowly ovate, long-pointed, more or 

 less falcate, bright red-brown, lustrous, \' long. Bark ^'-f ' thick, dark brown or 



nearly black, and deeply divided by narrow fissures into broad flat ridges separating 

 on the surface into closely appressed scales. 



Distribution. Banks of streams in the cafions of the mountains of southern 

 Arizona; through central and southern Mexico. 



-i- -i- Petioles glandular. 



6. Salix lasiandra, Benth. Black Willow. 



Leaves involute in the bud, linear-lanceolate, long-pointed, gradually rounded at 

 the narrowed base, finely serrate, when they unfold pilose on the upper surface and 

 pubescent or tomentose on the lower, at maturity dark green and lustrous above, 

 pale or glaucous below, 4'-5' long, '-!' wide, with broad orange-colored midribs; 

 their petioles glabrous or pubescent, |'-^' long, furnished at the apex with 2 or more 

 large dark glands; stipules .semilunar, glandular-serrate, small and deciduous, or on 

 vigorous shoots large and foli^ceous. Flowers : aments terminal, erect, cylindrical, 

 l^'-2' long, on leafy branches, the staminate sometimes ^' in diameter and nearly twice 

 as broad as the pistillate, their scales obovate, yellow, more or less villous below the 

 middle, glandular-dentate, scales of the pwfillate ament narrower and sometimes 

 nearly entire ; stamens 5-9, with free filaments hairy at the base; ovary cylindrical, 

 short-stalked, glabrous, with a short style and spreading slightly emarginate stigmas. 

 Fruit light reddish brown, about \' long. 



A tree, often GO high, with a trunk 2-3 in diameter, straight ascending branches 

 forming an open irregular hoad, rather stout branchlets, at first dark purple, reddish 

 brown or yellow, pilose, with scattered hairs, or pubescent or tomentose or often 

 covered with a glaucous bloom, becoming at the end of the first season dark pur- 

 ple, bright red-brown, or light orange color ; toward the southern limits of its range 

 and in the interior of the continent much smaller, sometimes shrubby. Winter- 

 buds broadly ovate, acute, light chestnut- brown and lustrous above the middle, pale 



