SALICACEAE. 



ii. Salix vestita Pursh. Hairy Willow. 

 (Fig. 1183.) 



Salix -cestita Pursh, Fl. Am. Sept. 610. 1814. 



A low shrub, similar to the preceding species, the 

 twigs 4-sided, green. Leaves obovate, thick, mostly 

 retuse or emarginate at the apex, slightly crenulate, 

 narrowed or rounded at the base, dark green and 

 glabrous above, persistently tomentose-silky be- 

 neath, short-petioled, i / -2 / long; petioles 2 // -4 // 

 long, channeled, not glandular; aments terminal, 

 unfolding after the leaves, stalked; stamens 2; fila- 

 ments distinct; capsules narrowly ovoid-conic, 

 sessile, densely silky-tomentose, about 3" long. 



Labrador and Quebec to the Northwest Territory. 

 June. 



12. Salix Bebbiana Sarg. 



Salix rostrata Richards. Frank. Joum. App. 753. 



1823. Not Thuill. 1799. 

 Sali.v Bebbiana Sarg. Card. & For. 8: 463. 1895. 



A shrub, 6-i8 tall, or sometimes a tree 25 

 high, the twigs pubescent or puberulent, terete. 

 Leaves elliptic, oblong or oblong-lanceolate, 

 acute, acuminate or some of them blunt at the 

 apex, rounded or narrowed at the base, sparingly 

 serrate or entire, dull green and puberulent 

 above, pale, reticulate-veined and tomentose be- 

 neath or nearly glabrous on both sides when very 

 old; petioles 2 // -6 // long; stipules semicordate, 

 acute, deciduous; aments sessile, expanding with 

 or before the leaves, dense, thestaminate I'-i^' 

 long, the pistillate 2' long in fruit; scales villous, 

 persistent or deciduous; stamens 2; filaments 

 distinct, glabrous; stigmas nearly sessile; capsule 

 very narrowly long-conic, densely pubescent, 

 twice as long as the filiform pedicel. 



In dry soil and along streams, Anticosti to Hud- 

 son Bay and British Columbia, south to New Jersey, 

 Pennsylvania, Nebraska and Utah. April-May. 



Salix humilis Marsh. 



Bebb's Willow. (Fig. 1184.) 



Prairie Willow. (Fig. 1 1 85. ) 



Salix humilis Marsh. Arb. Am. 140. 17 



A shrub, 2-8 tall, the twigs tomentose 

 or pubescent, terete. Leaves oblanceolate, 

 petioled, 2 / -4 / long, 4' / -S // wide, acute at 

 both ends or the lower broader and obtuse 

 at the apex, sparingly denticulate, the mar- 

 gins slightly revolute, the upper surface 

 dark green, dull, puberulent or glabrous, the 

 lower densely and persistently gray-tomen- 

 tose; petioles 2 // -3 // long; stipules obliquely 

 lanceolate or ovate, acute, commonly 

 sistent; aments unfolding much before the 

 leaves, sessile, ovoid-oblong, short, dense, 

 the pistillate about i' long in fmit; stamens 

 2; filaments glabrous; stigmas nearly - 

 capsule narrowly conic, densely puK 

 much longer than its pedicel. 



In dry soil. Nova Scotia to western Ontario, 

 south to North Carolina, Tennessee and Ne- 

 braska. Hybridizes with 5. discolor. !\pril- 

 May. 



