WILLOW FAMILY 



495 



15. Salix mackenziana (Hooker) Barratt. Mackenzie Willow. Fig. 1204. 



Salix cordata mackenziana Hook. Fl. Bor. Am. 2: 149. 

 1838. 



Salix mackenziana (Hook.) Barratt, in Anderss. Svensk. 

 Vetensk. Akad. Handl. (Monog. Sal.) 6: 160. 1867. 



A shrub or small tree, 2-6 m. tali, with 

 elongated dark brown or yellowish branchlets ; 

 leaves lanceolate or ovate-lanceolate, to conic- 

 lanceolate (often obovate while expanding), 

 short-acuminate, rounded to cordate at the base, 

 glandular-serrulate, 6-10 cm. long, 2-3.5 cm. 

 wide, glabrous, glaucous beneath ; aments ap- 

 pearing with the leaVes, on short (4-8 mm.) 

 peduncles bearing 2-3 small leaves ; pistillate 

 rather lax, 2.5-6 cm. long; scales oblanceolate, 

 obtusish, drying brown, thinly tomentose on the 

 outside, densely so within ; capsule 4.5-5.5 mm. 

 long, glabrous; pedicel 2.5-4 mm. long; 

 style about 0.5 mm. long; staminate aments 

 shorter and more dense ; stamens 2 ; filaments 

 2, glabrous. 



Sea level to 5,000 feet elevation. Transition and Canadian Zones; southern British Columbia to Lake 

 County, California, and Washoe County, Nevada, east to northern Utah, western Montana, and Mackenzie 

 (Great Slave Lake). Tyjje locality: "Great Slave Lake and Mackenzie River." 



Salix mackenziana macrogemma Ball, in Piper and Beattie, Flora N. W. Coast 116. 1915. Branchlets 

 den.'^ely pubescent-tomentose with gray hairs; buds elongated, 10-16 mm. long, lanceolate, acuminate, densely 

 pilose-tomentose with long gray hairs; petioles and basal portion of midrib on upper surface pubescent, other- 

 wise as in the species. 



Low ground, sea level, to 500 feet. Transition Zone; Puget Sound from Seattle, Washington, south up the 

 Willamette Valley to Eugene, Oregon. Type locality: "Seattle." 



16. Salix farrae Ball. Farr's Willow. Fi?. 1205. 



Salix farrae Ball, in Standley, Contrib. U. S. Nat 

 Herb. 22: 321. 1921. 



Small shrub, probably Z-6 dm. tall; 

 branchlets glabrous, bright red, lustrous 

 (often drying dull brown), seasonal twigs 

 yellowish ; stipules obsolete or small ; petioles 

 slender, twisted ; blades elliptical-oblanceolate 

 to elliptic-oval or broadly oval-lanceolate, 

 acute at apex, acute to usually rounded at 

 base, entire or nearly so. 1-1.8x3.5-5 cm.; 

 glabrous, glaucous or subglaucous beneath, 

 loosely reticulate with 'slender raised veins; 

 aments coetaneous, short-pedunculate ; 

 pistillate 2-4 cm. long in fruit ; capsule 

 lanceolate, often acute at base. 4-5 cm. long, 

 glabrous; pedicel 1-1.5 mm. long; style 0.3- 

 0.5 mm. long; stigmas short; scales oblong 

 or oblanceolate, obtuse, fuscous at apex, paler 

 below, glabrous outside. 



Rocky Mountains of southern British Columbia and Alberta, and northwestern Montana to Yellow- 

 stone Park, and on the Imnaha, Wallowa County, Oregon. Type locality: "on the flats along the Kick- 

 ing Horse River, Field, B. C, Can." 



