86 SALICACE^. Salix. 



Avith long wliite liairs : capsules ovate-conical, glabrous : pedicel -i to 7 times the 

 length of the nectary : style short ; stigmas bilid. — Anders. Sal. ^Monogr. 157, tig. 

 91 ; DC. l^rodr. xvi^. 252. ^6'. iiitea, :Nutt. Sylva, i. 63, t. 19. 



A' ar. Mackenziana, Hook. Leaves obovate-lanceolate, narrowed at base, sub- 

 entire ; stipules small or none : aments shortly peduncled : pedicels long and slen- 

 der, much exceeding tlie small sparsely villous tawny scale. — Fl. Bor.-Ani. ii. 149; 

 Anders. 1. c. IGO, fig. 91* (not good). 



Var. Watsoni, IJeljb. Dilfusely branched, the short and divaricate yellowish- 

 green or grayish branches very smooth and polished : leaves smaller, oblong, short- 

 acuminate, 1 to 2 inches long, serrulate or nearly entire : aments 1 inch or less in 

 length, usually crowded. ■ — S. cordata, var. (1), Watson, Bot. King Exp. 325. 



From the Northern States to the Arctic Coast ; frequent througli Nevada and Utah, in Colo- 

 rado and northward, apjiarently rare in California. Collected bj' Bohmder in the Yosennte Valley, 

 and at Yreka by Greene ■ the variety IVatsoni, peculiar in habit, near Carson City {Watson), and 

 in Sierra County, Leinmon : the variety Mackcnziana (easily mistaken for a form of S. lasiiindra) 

 from Lake County {^Indcrson) and far northward ; certainly not a hybrid between S. cordala and 

 S. rosLrata as conjectured by Andersson. 



8. S. lasiolepis, Benth. Leaves oblanceolate or rarely oblong-oblanceolate, 

 obliquely acute or acuminate, 4 to 6 inches long, ^ to 1 inch wide, the lower spatu- 

 late, obtuse, more or less pubescent especially at hrst, at length glaucous and ferru- 

 ginous beneath and coriaceous in texture, the margin unequally subserrate ; stipules 

 mostly wanting : aments sessile or scarcely peduncled with a few deciduous bracts 

 at base, 1| to 3 inches long, erect or somewhat flexuose, cylindrical, densely flow- 

 ered ; scales roundish, dark, densely clothed with crisp white liairs : stamens yel- 

 low, 3 times the length of the scale ; filaments slightly united at base : capsules 

 acute, smooth, dark green, shortly pedicelled : stvles medium sized ; stigmas sliort, 

 erect. — PI. Hartw. 335 ; Ander.s. DC. Prodr. xvi^. 264. 



Var. Bigelovii, Bebb. Leaves obovate or cuneate-oblong, obtuse, entire (at 

 least the earliest), grayish silky-pubescent beneath : aments on short and villous 

 often somewhat leafy peduncles : pedicel about the length of the villous scale. — 

 S. Biqelovii,Toxv. in Pacif. B. Pep. iv. 139; Anders. Sal. Monogr. 163, fig. 94, 

 & DC. Prodr. xvi2. 255. S. ? Watson, Bot. King Exp. 325. 



Var. (?) fallax, Bebb. Leaves lanceolate-oblong, abruptly contracted or even 

 rounded at base, glaucous and pubescent beneath ; stipules semilunar, denticulate, 

 persistent : aments smaller and less densely villous. 



Throughout the State, from San Diego to Yreka, and in the Sierra Nevada, the commonest of 

 Californian willows and exceedingly variable. In the neighborhood of San Francisco and south- 

 ward it attains under favorable conditions the height of 40 to 60 I'eet, but northward and in the 

 mountains at 4,000 feet elevation is reduced to a bush, less than 10 feet high, branching near the 

 ground. Bark smooth, grayish-brown, scarcely fissured even on old trees. Aments apjiearing 

 beibre the leaves, or southward, near Los Angeles, etc., in the axils of the persistent leaves of the 

 previous season. S. Hartwegi, Benth. (-S'. humilis, var. (?) Hnrticec/i, Anders. I. c. 236), is clearly 

 founded on this serotinous state. Professor Andersson was apparently deceived by the lemarkable 

 lesemblance which the leaves of this species bear to S. humilis when he asserts (1. c.) that he saw 

 S. humilis "in California, very common." 



* * Cajjsttles iomentose. 



-f— Styles obsolete. 



9. S. flavescens, Nutt. Leaves obovate or oblanceolate, acute or shortly acu- 

 minate, only the lower obtuse, wedge-shaped at base, 2 or 3 inches long, 1 to 1^ 

 inches Avide, downy but very soon giabrate and dull green above, glaucous and 

 rufous-pubescent beneath or often Avhen young clothed with a compact lustrous silky 

 tomentum ; the margin entire or irregularly serrate ; stipules semicordate, denticu- 

 late : aments sessile, oblong, recurved, densely flowered, appearing before the leaves ; 

 scales blackish, obovate, villous with long silky hairs : capsules ovate-lanceolate. 



