SALICACEAE. 73 



103. SALIX. Willow. 



Trees or shrubs with single-scaled buds, the scales with an 

 adherent membrane within ; leaves short- petioled, mostly narrow, 

 with broad or minute stipules; bracts of the aments mostly 

 entire, small or minute; flowers each with one or two small 

 glands at its base; staminate aments dense, erect, spreading or 

 drooping; pistillate aments usually erect or spreading; staminate 

 flowers with 1-10, most 2 or 5, stamens; ovary sessile or short- 

 stipitate. 



Trees with furrowed bark; stamens 3-5 or more; aments on 

 short leafy branchlets. 

 Petioles slender, glandless; leaves broadly lanceolate. 5. amygdaloides. 



Petioles short, glandular; leaves narrowly lanceolate. 5. lasiandra. 



Shrubs, rarely trees, with smooth or at least not furrowed 

 bark; stamens 2 or 1. 

 Aments on short leafy branchlets; scales pale. 



Stigmas long and slender. 5. macrostachya. 



Stigmas short and thick. 



Capsules pubescent. 5. argophylla. 



Capsules glabrous. 



Leaves canescent, at least when young, entire 



or denticulate. 5. exigua. 



Leaves green, glabrous, pale beneath, usually 



somewhat serrate. 5. mclanopsis. 



Aments sessile or nearly so, appearing with or before the 

 leaves; scales dark (except in 5. bebbiana). 

 Capsules glabrous, long-pedicelled. 



Leaves glaucous beneath, shining green above, 



not subcordate. 5. piperi. 



Leaves not shining above nor glaucous beneath, 

 subcordate. 

 Leaves pale beneath. 5. cordata. 



Leaves green on both sides. 5. pyrifolia. 



Capsules not glabrous. 



Scales pale; aments appearing with the leaves. 5. bebbiana. 



Scales dark; aments appearing before the leaves. 



Stamen 1 ; leaves entire, silvery-silky beneath. S. sitchensis. 

 Stamens 2. 



Style elongate. S. bella. 



Style none, the stigmas sessile. 5. scouleriana. 



Salix amygdaloides Anders. Almond Willow. Tree 5-10 m. tall, with 

 cinnamon-colored fissured bark; leaves glabrous, lanceolate, serrate, attenuate- 

 acuminate, green above, glaucous beneath, 10-15 cm. long; petioles slender, 

 without glands; stipules ear-shaped or reniform, usually small and quickly 

 deciduous; aments on leafy branchlets; staminate flexuous, dense, 5-6 cm. 

 long; scale pale, hairy; stamens 5 or more; pistillate becoming loose and elon- 

 gated ; capsules glabrous, the slender pedicels much exceeding the pale fugacious 

 scales; stigmas sessile or nearly so. Common on the banks of Snake River. 



Salix lasiandra caudata (Nutt.) Heller. Tree 10-20 m. tall, with rough 

 longitudinally fissured bark; leaves lanceolate, long-acuminate, crenulate, 

 green and glabrous on both sides, 8-16 cm. or more long; the short petioles 

 and the very base of the leaf glandular; stipules ear-shaped, sometimes large; 



