WILLOW FAMILY 191 



1. S. nigra Marsh. A tree 10-20 m., rarely 30-40 m. high- leaf-blade- 

 6-12 cm. long bright green on both sides, finely* serrate, usually more or less 

 falcate; aments appearing with the leaves, the staminate ones 4-6 cm long- 

 bractlets ovate, finely villous; pistillate aments 4-8 cm. or in fruit 10-12 cm 

 long; bractlets oblong, finely pubescent; capsule about 3 mm. long- stipe 1- 

 mm. long. BLACK \\ ILLOW. River banks and wet places: N B Fla Tex 

 N.D. Plain. Ap-My. 



S amygdaloides X nigra Glattf This hybrid is intermediate between the two 

 parents with narrower leaves less glaucous beneath, and with shorter petioles than 



S ^ In ^ 



2. S. Wrightii Anders. A tree 8-10 m. high; bark of the stem flaky, gray; 

 leaf-blades o-lo cm. long, light and usually yellowish green above, paler and 

 sometimes glaucous beneath, finely serrate; aments 2-7 cm. long; bractlets of 

 the staminate aments ovate, finely pubescent, those of the pistillate ones oblong- 

 capsule about 4 mm. long; stipe 1-2 mm. long. River banks: Tex Colo. 

 Nev. s Calif.; n Mex. Son. Submont. Ap-My. 



3. S. amygdaloides Anders. A tree up to 20 m. high; twigs yellowish; 

 leaf -blades 8-12 m. long, acuminate, finely serrate, paler and somewhat glau- 

 cous beneath; aments 3-5 cm. long; bractlets oblong or lanceolate, somewhat 

 pubescent; capsule about 5 mm. long; stipe 1-2 mm. long. PEACH-LEAVED 

 WILLOW. River and lake banks: Que. N.Y. Mo. Tex. Ariz. Ore. B.C. 

 Plain Submont. Ap-My. 



4. S. laevigata Bebb. A tree 5-15 m. high; trunk with brown fissured 

 bark; twigs yellowish, pubescent when young; leaves lanceolate or lance-oblong, 

 acute or acuminate, 7-15 cm. long, dark green and glossy above, pale or glaucous 

 beneath, minutely serrate; aments 5-10 cm. long; bractlets villous, dentate, in 

 the staminate aments obovate, in the pistillate ones narrower; stipe 3 to 4 times 

 as long as the glands. Along streams: Ore. Utah Calif. Son. Ap-Je. 



5. S. erythrocoma Barrett. A shrub or small tree (?); bark of the twigs 

 dark, purplish brown; leaf-blades 3-5 cm. long, finely glandular-serrate, reddish 

 pubescent when young, in age glabrate on both sides; aments 2-4 cm. long. S. 

 arguta erythrocoma Anders. Banks of rivers and lakes: Man. 'B.C. Mack. 



6. S. serissima (Bailey) Fern. A shrub 2-4 m. high; leaf-blades lanceo- 

 late, acute or acuminate, when mature dark green, shining above, pale beneath, 

 thick and firm, 4-10 cm. long, closely and finely glandular-serrate; aments 1-2.5 

 cm. long; capsules 7-12 mm. long. S. pallescens hirtisquama Anders. AUTUMN 

 WILLOW. Swamps: Mass. N.J. Wis. Minn. Sask. Boreal. My-Jl. 



7. S. lucida Muhl. A tall shrub or sometimes a tree 6-8 m. high; leaf- 

 blades mostly abruptly long-acuminate, acute or rounded at the base, sharply 

 glandular-serrate, green and shining, slightly paler beneath, 7-12 cm. long; 

 aments 2-5 cm., or the pistillate even 7 cm. long; bractlets sparingly pubescent; 

 capsule 5 mm. long. SHINING WILLOW. Swamps and banks: Newf. N.J. 

 Ky. Xeb. Alt a. Boreal. Ap-My. 



8. S. Fendleriana Anders. A shrub or small tree, rarely 10 m. high; leaf- 

 blades lanceolate, long-acuminate, finely glandular-dentate, acute at the base, 

 6-15 cm. long; aments 2-5 cm. long; bractlets toothed towards the apex; stamens 

 5-9; capsule 5 mm. long. S. lasiandra caudata (Nutt.) Sudw. Along mountain 

 streams: B.C. Alta (Black Hills) S.D.N.M Calif. Submont. Mont. 

 Ap-My. 



9. S. Lyallii (Sarg.) Heller. A tree sometimes 20 m. high; bark brown or 

 of the twigs yellow; leaf -blades broadly lanceolate, more or less acuminate, finely 

 glandular-serrate, 6-20 cm. long; aments 4-8 cm. long, or the pistillate ones 

 sometimes 10 cm. long; bractlets toothed above; stamens 5-8; capsule about 6 

 mm. long. S. lasiandra Lyallii Sarg. River and lake banks: B.C. Yukon- 

 Mont. Calif. Submont. Ap-My. 



10. S. alba L. A large tree sometimes 30 m. high; leaf -blades serrulat< 

 silky-pubescent on both sides when young, pale beneath, 5-12 cm. long; aments 

 on short leafy branches, 3-6 cm. long, 4-5 mm. thick; bractlets of the 



