604 



SALICACEAE. 



VOL. I. 



35. Salix arctica Pall. 

 Ground Willow. 



Salix arctica Pall. Fl. Ross, i : 

 A low branching shrub, 



Arctic Willow. 

 Fig. 1485. 



Part 2, 86. 1788. 

 rarely 6' high, "the 



i 



twigs terete or nearly so. Leaves glabrous, elliptic 

 or broadly obovate, entire, obtuse and usually 

 rounded at the apex, narrowed or rounded at the 

 base, long-petioled, pale, glaucous and reticulate- 

 veined beneath, i'-2' long, i'-ii' wide, often dark- 

 ening in drying; petioles slender, \'-\\' long; 

 aments borne at the ends of short leafy branches, 

 very dense, the pistillate i'-2 r long in fruit; bracts 

 dark purple-brown, oblong to obovate, obtuse, 

 white-villous, persistent ; stamens 2 ; filaments 

 glabrous; style filiform, longer than the stigmas; 

 capsule conic, villous, very short-pedicelled. 

 Quebec ; Arctic America and Asia. Summer. 



Salix callicarpaea Trautv., of Labrador and re- 

 corded from Quebec, has broadly obovate leaves 

 which do not darken in drying. 



36. Salix Waghornei Rydberg. Waghorne's 

 Willow. Fig. 1486. 



S. cordifolia Hook. Fl. Bor. Am. 2: 152. 1840. Not 



Pursh, 1814. 

 S. Waghornei Rydberg, Bull. N. Y. Bot. Card. 1 : 271. 



1899. 



A low shrub, i high or less, with smooth shining 

 twigs, sparingly pubescent when young. Leaves 

 obovate or elliptic-obovate, rather thin, entire, about 

 i' long, i'-!' wide, sparingly long-hairy when young, 

 soon glabrous, remaining green in drying, the petioles 

 i"-4" long, the stipules deciduous; aments on 

 lateral leafy branches, the pistillate about i' long in 

 fruit, the staminate shorter; bracts yellow, oblong, 

 obtuse, silky-hairy; capsule short-stalked, white- 

 tomentose, conic, 2"-^" long; style about as long as 

 the stigmas. 



Labrador. Summer. 



37. Salix desertorum Richards. Desert or Prairie Willow. Fig. 1487. 



Salix desertorum Richards. Frank. Jour. App. 371. 

 1823. 



A shrub, 6'-i2' high, with purplish-green gla- 

 brate twigs. Leaves oblong or oblanceolate, acute 

 at the apex and cuneate at the base or the lower 

 obtuse at both ends, entire or very nearly so, 

 very short-petioled, tomentose beneath or gla- 

 brate when old, \'-2 r long, 2"~4" wide; stipules 

 fugacious ; aments expanding with the leaves, 

 dense, \' or less long, leafy at the base ; stamens 

 2; filaments glabrous; style about as long as the 

 deeply 2-cleft stigmas ; capsule ovoid-conic, acute, 

 densely tomentose, about 2" long, very short- 

 pedicelled. 



Anticosti and Quebec to western arctic America. 

 Summer. 



Salix brachycarpa Nutt. (S. strict a (Anders.) 

 Rydb.), differs in leaves tomentose on both sides and 

 hairy twigs. It occurs in Quebec, and ranges other- 

 wise from Saskatchewan to Colorado. 



