114 SALICACEAE. 



throughout; blades broadly oblan- 

 ceolate. S. piperi. 



Branchlets tomentose; leaves ellip- 

 tic-ovate, tomentose beneath. 5. hookeriana. 

 Capsule pubescent. 



Tall shrubs or small trees. 



Styles 1-1.5 mm. long; scales obovate, black, 

 long-pilose. 

 Capsules 3-4 mm. long; stamen 1 ; leaves 

 spatulate-oblanceolate, silvery-silky 

 beneath. 5. sitchensis. 



Capsules 6-8 mm. long; stamens 2. 



Leaves elliptic-ovate, gray tomentose 



beneath. 5. hookeriana. 



Leaves obovate, glabrous and glau- 

 cous beneath. 5. pennata. 

 Styles 0.2-0.4 mm. long. 



Leaves large, broadly obovate to ellip- 

 tical; scales obovate, black; stigmas 

 long. 5. scouleriana. 



Leaves small, narrowly oblanceolate; 

 scales narrow, yellowish to brown; 

 stigmas short. 5. geyeriana. 



Prostrate alpine shrubs; a few inches high. 

 Leaves lanceolate, acute at each end, green 



both sides; styles 2 mm. long. 5. cascadensis. 



Leaves oval, obtuse at apex, reticulate, 

 glaucous beneath; styles very short. 

 Leaves 1-3 cm. long; aments many- 

 flowered. 5. saximontana. 

 Leaves 5-10 mm. long; aments 3-6- 



nowered. 5. nivalis. 



Salix lasiandra lyallii Sarg. Tree 10-20 m. tall, with rough longitudinally 

 fissured bark; leaves lanceolate, long-acuminate, crenate-serrulate, glaucous 

 beneath, 8-16 cm. or more long, the short petioles and the very base of the 

 leaf glandular; stipules ear-shaped, sometimes large; aments on leafy branch- 

 lets; staminate dense, 3-5 cm. long; scales pale, lanceolate, more or less dentate; 

 stamens 5 or more, the filaments hairy at the base; pistillate aments 3-10 cm. 

 long and rather loose, the pale lance-ovate scales hairy at the base, deciduous; 

 capsule glabrous, 6-7 mm. long; pedicel about 2 mm. long; style about 0.5 mm. 

 long. 



Common along- lake and river banks and in swamps. 



Salix melanopsis Nutt. Shrub, 3-5 m. high; twigs dark, glabrous; leaves 

 oblanceolate to elliptical, 5-10 cm. long, 6-15 cm. wide, glabrous or thinly 

 pubescent, paler or sub-glaucous beneath, remotely denticulate or subentire; 

 stipules triangular-ovate, acute, few-toothed; aments slender, 3-4 cm. long, 

 on elongated leafy branches; scales obtuse, tawny; capsules subsessile, ovoid- 

 conic, obtuse, 4 mm. long, glabrous; stigmas sessile, short, divided. 



Usually on gravelly banks of streams; rare in our limits. 



Salix fluviatilis Nutt. (?) Shrub 2-6 or 8 (?) m. high; branchlets pubescent 

 to glabrous; stipules ovate-lanceolate, 2-6 mm. long; leaves subsessile, narrowly 

 lanceolate or elliptical (on fruiting branches often oblanceolate), acute or 

 short acuminate at both ends, subaristate at the apex, 5-7 cm. long, 8-14 mm. 

 wide (leaves subtending the branchlets much larger), remotely spinulose- 

 denticulate, thinly pubescent, becoming glabrate (the young often silvery 



