Salicaceae 121 
BB. Stamen 1; twigs brownish, hairy; staminate aments 2.55 cm. long, their 
scales obtuse. W.C. E. §. sitchensis Sans. (Sitka Willow) 
Subgenus PH YLICIFOLIAE—Shrubs, much branched, alpine or subalpine, |—3 
m. high; twigs short, divaricate, shining, brown. Leaves small, elliptic-ovate to obovate 
or oblanceolate, usually entire, bright-green and shining above, pale or suk¢!aucous be- 
neath, glabrous thruout or very thinly villous beneath with short silvery hairs. Aments 
sessile, stoutish, dense. Capsule sessile, gray-pubescent; style elongated; stigma thick. 
C. (S. chlorophylla.) S. phylicifolia L. (Tea-leaved Willow) 
Subgenus CAPRAE—Tall shrubs or trees of wide distribution, 2—6 m. high; 
dark gray; twigs dark-brown to black. Leaves rather large, lanceolate oblong to obo- 
vate, entire to crenulate or crenulate-dentate, more or less pubescent to tomentose specially 
beneath, glabrate in age, dark-green above, glaucous beneath. Aments appearing before 
the leaves, stout, dense, sessile or subsessile; scales blackish, wide, long-villous. Capsule 
gray-pubescent or tomentose, long-beaked, 7—9 mm. long; pedicel 12.5 mm. long; 
style short or none; stigmas jong, bifid. 
A. Capsule pubescent; scales black. W.C.E. (S. nuttallit.) 
S. scouleriang Barr. (Scouler Willow) 
“\A. Capsule tomentose; scales yellow. W. 
S. heokeriang Barr. (Hooker Willow) 
Subgenus ROSTRATAE—Shrubs, 2—5 m. high; twigs slender, divaricate, full 
of leaf scars. Leaves linear-oblanceolate to elliptical-oval, mostly entire, somewhat pu- 
bescent on both sides; stipules none or small. Staminate aments small, subsessile, with 
small leafy bracts at base; pistillate aments on pubescent leafy peduncles, rather lax 
in fruit; scales linear-oblong, acute, thinly pilose, tawny, reddish at tips. Capsule long- 
stalked, conic-rostrate, 5-10 mm. long, pubescent; style short or none; stigmas short, 
bifid. 
A. Leaves elliptical-oval; peduncle of ament 2—5 mm. long; twigs without bloom. E. 
(S. rostrata.) S. bebbiana Sarg. (Bebb Willow) 
AA. Leaves linear-cblanceolate; peduncle of ament 1.5—-2.5 mm. long; twigs with 
bloom. W. E. S. geyeriana Anders. (Geyer Willow) 
Subgenus RETICULATAE—Shrubs, low or creeping, densely caespitose, alpine, 
5—90 cm. high. Leaves elliptic-oblong or obovate or suborbicular, strongly reticulate 
and glaucous beneath; petiole slender, channeled; stipules none. Aments on naked 
peduncles, arising opposite the last leaf. Capsule small, sessile, tomentose; style none; 
stigma short, bifid. 
A. Stems ascending, 30—-90 cm. high; leaves long-hairy beneath, 3—-4.5 cm. long, 
2—3.5 cm. wide, obscurely crenulate; aments 3—3.5 cm. long. E. 
; S. vestita, Pursh 
AA. Stems creeping, 3—10 cm. high; leaves glabrous beneath, 0.7—2.5 cm. long, 
0.4—1.5 cm. wide, entire; aments |—2 cm. long. 
B. Leaves 15—25 mm. long, 10—15 mm. wide; aments |—2 cm. long, many- 
flowered. C. §. saximontana Rydb. 
BB. Leaves 7—12 mm. long, 4—8 mm. wide; aments 0.5—1I cm. long, 3—6- 
flowered. C. S. nivalis Hook. 
