36 SALICACEAE 



S. Blades glabrous or nearly so above and below. 



T. Leaves small (1-2 inches long), oblong, closely re- 

 ticulated S. pedicellaris, p. 47 



T. Leaves large (2-4 inches long), coarsely reticulated 

 beneath. 



U. Obovate, thin and entire S. discolor, p. 48 



U. Elliptic-oval, thick, coarsely repand-dentate 



S. discolor var. eriocephala, p. 49 



S. Blades tomentose and more or less rugose, at least 

 beneath. 

 V. Linear-oblanceolate ; white-woolly beneath 



S. Candida, p. 57 



V. Oblanceolate ; gray-tomentose beneath. 



W. Leaves 2-4 inches long S. humilis, p. 51 



W. Leaves 1-2 inches long S. tristis, p. 53 



V. Elliptic-oval or rhomboidal S. Bebbiana, p. 52 



SALIX LONG! PES Shuttleworth 

 Ward's Willow 



Through most of its range Ward's Willow, fig. 4, is a low, 

 gray-barked shrub 3 to 10 feet high, but it may become tall and 

 treelike. Its narrowly to broadly lanceolate leaves, 2yi to 6 

 inches long by ^ to ll^ inches wide, taper from the rounded 

 base to a long, acuminate point. The margin is finely and closely 

 serrate, and the blade is dark green above but densely and 

 whitely glaucous beneath, at first more or less pubescent but 

 later glabrous above and usually also below, though often re- 

 maining somewhat pubescent beneath, especially on the midrib. 

 The petioles are ]/^ to y?, inch long, moderately stout, thinly to 

 densely pubescent, and yellowish to dark brown. The conspicu- 

 ous stipules, often ^ inch long, are ovate to reniform, acute 

 or rounded, sharply serrate like the leaves, eventually glabrous, 

 and densely white-glaucous beneath. Branchlets are rather 

 slender, glabrous or finely pubescent, yellowish to dark red 

 brown, and terete. The reddish-brown buds are about ]/s inch 

 long, blunt ovate, appressed, and thinly to heavily pubescent. 



Catkins appear before the leaves. They are slender, lax, and 

 Ij/^ to 4 inches long. At first nearly sessile, eventually they ter- 

 minate leafy peduncles 1/^ to 2 inches long. The scales of the 

 flowers are ovate to oblanceolate, yellowish, and villous. The 

 staminate flowers have 5 to 8 stamens, the filaments of which 

 are hairy toward the base. The pistillate flowers have very 

 short styles terminated by 2 very short, entire stigmas. The 



