198 SALIC ACE AE 



66. S. Austinae Bebb. A shrub 1-3 m. high; leaf-blades usually short- 

 acuminate, 3-6 cm. long, glabrous or slightly pubescent but green above, glaucous 

 beneath; aments 2-5 cm. long; bractlets oblong, brown, sparingly white-silky; 

 capsule elongate, subconic, 6-8 mm. long; stipe very short; style nearly 1 mm. 

 long. S. glaucops glabrescens Anders. Wet places on the mountains: Alta. — 

 Wyo. — -B.C. — Yukon. Submont. — -Mont. Je-Jl. 



S. Austinae X pseudolapponum. Tliis has the glabrous leaves and yellowish or 

 light-brown bractlets of S. Austinae, but the low habit, smaller leaves and short capsule 

 of S. pseudolapponum. S. wyomingensis Rydb. Mountains: Wyo. Jl. 



67. S. MacCalliana Rowley. A shrub 1-2 m. high; leaf-blades 6-7 cm. 

 long, 1.5 cm. wide, acute at both ends, puberulent when young, soon glabrous, 

 green on both sides, finely serrulate; aments 3-4 cm. long; bractlets greenish or 

 brown; capsule elongated-conic, white-velvety, 8-10 mm. long; stipe 1 mm. 

 long; style less than 1 mm. long. Low ground: Alta. Mont. 



68. S. saskatchewana v. Seem. A tall shrub or small tree; leaf-blades 

 acute at both ends, 3-6 cm. long, 1 cm. broad or less, finely serrate, soon glabrate, 

 dark green above, glaucous beneath; aments 2-5 cm. long; bractlets brown, 

 oval, sparingly villous; capsule grayish silky, with short hairs, about 5 mm. long, 

 nearly sessile; style scarcely 0.25 mm. long. River banks and marshes: Sask. 

 — ^Alta. — Yukon. Boreal. Je. 



69. S. petrophila Rydb. A depressed creeping undershrub, less than 1 

 dm. high; leaf-blades 1-3 cm. long, obtuse, glabrous or sparingly silky at first, 

 entire-margined, sUghtly paler and strongly veined beneath; aments 2-3 cm. 

 long; bractlets blackish, obovate, sparingly silky-villous; capsule white- villous, 

 sessile, 5-7 mm. long; style fully 0.5 mm. long. S. arctica petraea Anders. Rock 

 Willow. Alpine peaks: B.C. — Calif.— N.M.— Mack. Alp.—Subalp. Jl-Au. 



70. S. cascadensis Cockerell. A depressed creeping undershrub, less than 

 1 dm. high; leaf -blades 1-2 cm. long, 2-5 mm. wide, light green on both sides, 

 strongly veined beneath; aments about 1 cm. long; bractlets black, obovate; 

 capsule grayish villous, about 4 mm. long, sessile; style about 0.5 mm. long. S. 

 tenera Anders. Alpine peaks: B.C. — -Wash. — Utah — Wyo. — -Mont. Alp. — 

 Mont. Jl-Au. 



71. S. Nelsonii Ball. A shrub 1-3 m. high; leaf-blades acute at both ends, 

 8-15 mm. wide, 3-6 cm. long, entire or sparingly crenate, dark green and shining 

 above, glaucous beneath; aments 1.5-3 cm. long; bractlets black or nearly so, 

 ovate, acute, long-silky; capsule silky-pubescent, sessile, 5-7 mm. long; style nearly 

 0.5 mm. long. Bogs and river banks: Colo. — Utah. — -Alta. Mont. — Subalp. Je. 



72. S. chorophylla Anders. A shrub 1-3 m. high; leaf-blades at first silky, 

 soon glabrate, dark green and shining above, glaucous beneath, acute at both' 

 ends, usually entire, 2-5 cm. long; aments 2-6 cm. long; bractlets black, obovate, 

 obtuse, silky-pilose; capsule sessile, 5-6 mm. long, grayish silky; style about 0.5 

 mm. long. Mountain swamps: Lab. — N.H.— N.M. — Utah— Alaska. Mont. — 

 Subalp. Je-Au. 



73. S. Fernaldii Blankinship. A low spreading shrub, up to 1 m. high; 

 leaf-blades oval, rarely ovate, rounded at both ends or sometimes acutish at the 

 apex, 3-5 cm. long, glabrous and green above, silvery-silky and strongly veined 

 beneath; margins sub-entire; aments at the ends of the leafy branches, 2-3 cm. 

 long; bractlets brown, short-villous, obovate; capsule short-ovoid, 2-3 mm. 

 long, sessile. Perhaps not distinct from the eastern S. vcstita Pursh. Moun- 

 tains: Alta. — Mont. — Ore. — B.C. Mont. — Subalp. Je-Au. 



74. S. orbicularis Anders. Low creeping undershrub; leaf-blades oval or 

 orbicular, 1.5-4 cm. long, 1-4 cm. wide, rounded at both ends or sometimes sub- 

 cordate at the base, glabrous, dark green above, pale and somewhat glaucous 

 beneath; aments at the ends of the leafy branches, 2-4 cm. long; capsule short- 

 ovoid, 3-5 mm. long, short-villous, sessile. (Perhaps not distinct from S. reticu- 

 lata L., which has narrower yellow bractlets and usually narrower leaves.) Net- 

 veined Willow. Arctic-alpine situations: Alaska — Canadian Rockies — Hudson 

 Bay. Alp. Je-Au. 



