WILLOW FAMILY 



507 



44. Salix nivalis Hooker. 

 Snow Willow. Fig. 1233. 



Sali.v iih-a!is Hooker, FI. Bor.-Am. 2: 152. 1839. 



Creeping shrub, 2-3 cm. high, from buried 

 stems ; leaves eUiptic, oblong-obovate, or 

 suborbicular, acute, obtuse or retuse, 7-12 

 mm. long, 4-8 mm. wide, green and shining 

 above, glaucous and strongly reticulate be- 

 neath, glabrous, margins entire and revo- 

 lute ; petioles 2-7 mm. long, yellowish ; 

 aments serotinous, globose or oblong, 3-6- 

 flowered, 1 cm. or less in length ; scales 

 oblong-obovate, obtuse, yellowish, nearly 

 glabrous ; capsules 2.5-3 mm. long, tomen- 

 tose ; style very short ; stigmas short, di- 

 vided. 



Boreal Zones; high peaks of the Cascade, Rocky 

 and Wasatch Mountain systems from British Co- 

 lumbia and Alberta south to Washington, Utah arid 

 Colorado. Type locality: "near the summits of fhe 

 peaks in the Rocky Mountains," lat. S2°-S6°, Al- 

 berta or British Columbia. 



46. Salix vestita Pursh. 

 Rock Willow. Fig. 1235. 



Sali.v vestita Pursh, Fl. Am. Sept. 2: 610. 1814. 

 Sali.v fernaldii Blankinship, Mont. Agr. Coll. Sci. 

 Studies Bot. 1: 46. 1905. 



A shrub 1-5 dm. high, with glabrous, 

 angular twigs ; leaves elliptic to oblong- 

 obovate or suborbicular, rounded to re- 

 tuse at the apex, acute to obtuse at the 

 base, 3-4.5 cm. long, 2-3.5 cm. wide, ob- 

 scurely crenulate, deep green and glab- 

 rous above, coarsely reticulate and long- 

 pilose beneath, especially on the midrib 

 and veins ; petioles 2-10 mm. long ; aments 

 serotinous on villous peduncles ; the 

 staminate linear, 2-3.5 cm. long, 0.5 cm. 

 wide ; pistillate aments 2-4.5 cm. long. 1 

 cm. wide ; scales oblong-ovate, tomentose ; 

 capsules ovate-conic, 4-5 mm. long ; style 

 very short. 



Boreal Zones; rocky places, mountains of 

 southern British Columbia and Alberta south to 

 northeastern Oregon, and northwestern Montana, 

 also Hudson Bay south to Quebec and Newfound- 

 land. Type locality: "in Labrador." 



^^■\^< 



45. Salix saximontana Rydberg, 

 Rocky Mountain Willow. 



Fig. 



1234. 



Bull. N. Y. 



Bot. 

 29: 



Salix saximontana Rydb. 



Card. 1: 261. 1899. 

 Salix aemiilans von Seemen, Bot. Jahrb. 



Beibl. 65: 28. 1900. 

 Salix reticulata of Am. authors (in part), not 



L. 

 Salix nivalis saximontana 



Gaz. 67: 47. 1919. 



Schneider, Bot. 



Densely cespitose and much branch- 

 ed, 3-6 cm. high ; leaves elliptic-oblong 

 to suborbicular, obtuse or abruptly 

 acute at the apex, 1.5-3 cm. long, 1-2 

 cm. wide, with entire and revolute 

 margin, light green above, glaucous and 

 strongly net-veined beneath, glabrous 

 throughout ; aments serotinous, 1-2 cm. 

 long, many-flowered ; scales broadly 

 obovate, yellowish, nearly glabrous ; 

 capsules 3-4 mm. long, sessile, densely 

 white-tomentose ; style very short ; 

 stigmas short, divided. 



Boreal Zones; high elevations, southern 

 British Columbia and Alberta, south to north- 

 east Nevada, and northern New Mexico. 

 Type locality: "Gray's Peak (Clear Creek(?) 

 County), Colorado." 



