194 SALICACE.\E 



29. S. commutata Bebb. A diffuse shrub 1-3 m. high; branches villous 

 when young; leaves broadly oblanceolate or oblong, abruptly pointed; aments 

 on short leafy branches, 2-4 cm. long; bractlets woolly; capsule about 5 mm. 

 long, greenish or reddish; stipe short; style about 1 mm. long. Alpine and sub- 

 alpine bogs: Ore. — Ida. — B.C. Mont. — Alp. Jy-Au. 



30. S. Tweedyi (Bebb) Ball. A tall shrub; twigs at first pubescent with 

 gray hairs; leaf -blades acute or obtuse at the apex, from acute to subcordate at 

 the base, yellowish green above, paler beneath; aments sessile and naked, ap- 

 pearing before the leaves, 4-6 cm. long; bractlets obovate, black, white-silky; 

 capsule green; stipe 1 mm. long; style 1.5-2.5 mm. long. Mountains: Mont. — 

 Wyo. Jf^Jl. 



31. S. conjuncta Bebb. A shrub 1-4 m. high; leaf -blades elliptic or 

 obovate, 3-4 cm. long, or on the young shoots 5-10 cm. long, acuminate or acute 

 at the apex, acute or rounded at the base, glabrous or slightly floccose when 

 young; aments on leafy peduncles, 3-5 cm. long; bractlets dark, acute, white- 

 villous; stipe and style about 1 mm. each. Wet mountain meadows: Wash. — 

 Mont. — Alaska. Subalp. Jl-Au. 



32. S. padophylla Rydb. A shrub 1-7 m. high; leaf-blades oval or broadly 

 eUiptic, crenate, short-acute or obtusish, roimded at the base, 3-5 cm. long; 

 pistillate aments 3-4 cm. long, densely flowered, borne on very short branches; 

 bractlets obovate, fuscous, covered on the outside with white wool; capsule about 

 6 mm. long; style about 1.5 mm. long; staminate aments almost sessile, 2-3 

 cm. long. S. padifolia Rydb., not Anders. Cherry Willow. River banks: 

 N.M.— Mont.^Utah. Submont.—Mont. My-Je. 



33. S. monticola Bebb. A shrub 2.5-3.5 m. high; leaf-blades lanceolate 

 to obovate, acute or acmninate, 8-15 cm. "long, glabrous, pale or glaucous be- 

 neath, serrate or crenate; aments thick, 2-3 cm. long; bractlets oval, silky with 

 long hairs; capsule sessile or nearly so. Along streams: Colo. — Alta. Sub- 

 ynont. — Mont. Je. 



S. cordata X monticola. Thi.s has the capsule shorter than in S. cordaia but longer 

 than in S. monticola, the habit and bark of the latter, but the narrow leaves (although 

 less serrate) and the bractlets of the Roclcy Mountain form of the former; the capsule 

 usually remains undeveloped. Northern Utah. 



34. S. curtiflora Anders. A tall shrub; twigs yellowish or rarely purphsh; 

 leaves oval-oblong or oblong-lanceolate, acute or short-acuminate at the apex, 

 rounded or rarely subcordate at the base, green and shining above, glaucous 

 beneath, finely serrate, 4-8 cm. long; bracts black, white-pilose; capsule long- 

 rostrate; stipe very short; stamens light yellow. S. pseudo-cordata Anders. 

 Wet places: Sask. — -Colo. — Alta. Submont. My-Jl. 



35. S. pseudomyrsinites Anders. A shrub 1 m. high or less; leaf -blades 

 obovate or oblanceolate, 2-6 cm. long, 8-25 mm. wide, light green on both sides; 

 aments on short leafy branches, 2-4 cm. long; bracts obovate, fuscous, white- 

 villous; capsule 4-5 mm. long; stipe about 1 mm. long; style about 0.5 long. 

 Mountain bogs: Lab.— -Que. — Wyo.- — Ore. — -Alaska. Subalp. — -Mont. Je-Jl. 



36. S. mjrrtillifolia Anders. A shrub 1-6 dm. high; leaf -blades obovate, 

 oblanceolate or oval, 1-3 cm. long, acute to rounded at the base; amonts on short 

 leafy branches, 1-3 cm. long; bractlets fiiscous, obovate, glabrous, or villous only at 

 the base; cap.sule 4-5 mm. long; stipe scarcely 1 mm. long: style minute. Blue- 

 berry Willow. Wet places: Alaska — Alta. — Mack. Alp. — Subalp. My-Je. 



37. S. Wolfii Bebb. A low shrub, less than 1 m. high: leaf-blades oblong 

 or elliptic, acute at both ends, 2-3 cm. long, 7-10 mm. wide, entire-margined; 

 aments subsessile, but usually subtended by a few .small leaves, 1-2 cm. long, 

 almost 1 cm. thick; bractlets very dark, sparingly villous; caj)sule 4-5 mm. long, 

 subsessile; style fully 1 mm. long. Mountain valleys: Colo. — Wyo. — Ida. 

 Mont.— Alp. My-Jl. 



38. S. irrorata Anders. A shrub 2-3 m. high; leaf-blades linear-lanceolate, 

 6-10 cm. long, glabrous, bright green and shining above, ])ale and glaucous 

 beneath, remotely serrate or entire; aments subsessile, usually naked, appearing 



