338 SALICACEAE 



Capsule more or less pubescent; leaves more or less white-silky, entire 



Far. argyrophylla. 



Stamens 2 (rarely 1), their filaments glabrous; stigmas entire or notched, rarely parted into 



linear lobes; scales usually black or dark-colored, mostly persistent. 

 Capsules glabrous. 



Leaves dark green above, white-pubescent beneath; catkins sessile, leafless; filaments 



more or less united; small tree or shrub; foothills mainly, common. 6. S. lasiolepis. 



Leaves light green, nearly alike on both faces; catkins shortly peduncled and leafy 



bracteate; filaments distinct or partly united; montane, rare with us 



7. S. cordata. 



Capsules tomentose, silky or puberulent. 

 Style none. 



Leaves obovate ; catkin-scales black, with white hairs 8. S. flavescens. 



Leaves lanceolate ; catkin-scales tawny 9. S. macrocarpa. 



Style evident. 



Stamen 1, or if 2 the filaments partly united; stigmas linear; leaves conspicu- 

 ously silky beneath 10. S. sitchcnsis. 



Stamens 2; stigmas short. 



Montane species; good sized shrubs; leaves entire or nearly so. 



Leaves glabrate beneath; catkins appearing with the leaves, borne on short leafy 



peduncles; Sierra Nevada 11. S. lemmoni. 



Leaves glaucous-pubescent beneath, long and narrow ; catkins appearing before the 



leaves, sessile; inner South Coast Eange 12. S. breweri. 



Alpine species; low shrubs or dwarfs. 



Capsule shortly pediceled, at least pistillate catkins on short leafy branchlets. 

 Ovary hoary or finely tomentulose. 



Leaves entire, usually green and glabrate 13. S. glauca. 



Leaves serrulate, usually gray-villous, the bract-like leaves glandular- 

 serrulate 14. S. calif arnica. 



Ovary glabrous; leaves bright green, dark veined 15. S. barclayi. 



Capsule sessile, 2 lines long ; catkins short, sessile or subsessile 16. S. monica. 



Capsule subsessile, 2 to 3 lines long; catkins terminal on short leafy branches; plant 

 body forming a more or less dense mat 17. 8. tenera. 



1. S. lasiandra Benth. YELLOW WILLOW. Tree 20 to 45 feet high, the trunk 

 with brown roughly fissured bark ; one-winter-old branchlets yellowish ; winter 

 buds keeled on the back, short and blunt ; young leaves lanceolate or oblanceo- 

 late, acuminate, glandular-serrulate, with small suborbieular stipules; mature 

 leaves lanceolate with long tapering or very slender point, 4 to 7 inches long, 

 % to 114 inches wide; petioles 3 to 9 lines long, glandular at the upper end; 

 stipules on vigorous shoots conspicuous, orbicular, 5 to 12 lines broad; stami- 

 nate catkins l 1 /^ to 3 inches long, usually straight, 5 to 6 lines thick; pistillate 

 catkins l 1 /^ to 214 inches long, 2i/> to 3 lines thick ; scales erect, oblong-lanceo- 

 late, thin, nearly or quite glabrous on the back, hairy at base, the staminate 

 yellow, the pistillate brown and mostly deciduous in fruit; stamens 4 to 9; 

 ovary and capsule glabrous. 



Banks of living streams throughout the Coast Kanges, Sacramento and San 

 Joaquin valleys, and Sierra Nevada southward to Southern California and 

 northward to British Columbia and Idaho. In the Sierra Nevada it is found 

 chiefly in the foothills but ranges as high as 4,500 feet at the north and 8,500 

 feet at the south. Also called "Waxy Willow" and "Western Black Willow." 



Eefs. SALIX LASIANDRA Bentham, PI. Hartw. p. 335 (1857), type loc. Sacramento Eiver 

 between Sacramento and Marysville, Hartweg ; Jepson, Fl. W. Mid. Cal. p. 136 (1901). 



2. S. laevigata Bebb. RED WILLOW. Tree 20 to 50 feet high, the trunk 

 bark roughly fissured; one-winter-old branchlets reddish brown; winter buds 

 ovate, pointed; young leaves broadly oblong, acute at each end, disposed to 

 be broadest above the middle, mucronate, entire, soon becoming serrulate; 



