118 Salicaceae 
FF. Leaves often hairy beneath but not silvery-hairy; style short (except in 
PHYLICIFOLIAE) ; capsule pubescent or tomentose but not silvery-hairy. 
G. Leaves glabrous on both sides, margin not revolute; style |—1I.5 mm. 
long. PHYLICIFOLIAE (p. 121) 
GG. Leaves either hairy beneath or else margin revolute; style 0.0—0O.3 
mm. long. 
H. Tall shrubs, 3—15 m. high, not alpine; leaves 2.5—15 cm. long; 
aments stout, 2.5—-7.5 cm. long; capsule 7—9 mm. long. 
CAPRAE (p. 121) 
HH. Low shrubs, less than | m. high, alpine; leaves 0.7—4.5 cm. long; 
aments not particularly stout, less than 2.5 cm. long; capsule 2.5——5 
mm. long. RETICULATAE (p. 121) 
DD. Aments on leafy peduncles. 
I. Shrubs 1.5 m. or less high (except S. lemmoni, S. barclayi, and S. macro- 
stachya) ; ament-scales wider than linear, obtuse or acute, brown or gray-brown 
or black, not reddish at tip; capsule-peduncle 2—5 mm. long. 
J. Stipules present, rather large on vigorous shoots (except S. wolfii); stigma 
entire. CoMMUTATAE (p. 120) 
JJ. Stipules none or very small; stigma not entire. ARCTICAE (p. 120) 
II. Shrubs 2—5 m. high; ament-scales linear-oblong, acute, tawny, reddish at 
tip; capsule-peduncle 0.0—1.5 mm. long. ROSTRATAE, (p. 121): 
Subgenus AMYGDALINAE—Trees; bark brown; twigs long and slender, often 
drooping, gray or yellow. Leaves linear-lanceolate to broad-lanceolate; blade widest 
below its middle, acuminate, closely and finely serrulate, glabrous; stipules small and 
deciduous or none. ‘Iwo kinds of aments appearing at the same time, slender, cylindric, 
terminal on leafy twigs. Scales deciduous, light-yellow, mostly glabrous outside, crisp- 
villous within. Stamens 2—9; filaments hairy below. Capsule small, glabrous, pedi- 
cellate; style 0O—0.5 mm. long; stigma short. Along streams or in wet places. — 
A. Leaves deep-green beneath when mature, narrowly lanceolate to linear-lanceolate; 
stipules semicordate; stamens 3—5. E. 
S. nigra Marsh (Black Willow) 
AA. Leaves pale or glaucous beneath even when mature. 
B. Leaves narrowly lanceolate or linear-lanceolate; stipules narrow; twigs strikingly 
long and pendulous; stamens 2; cultivated. W. E. 
S. babylonica L. (Weeping Willow) 
BB. Leaves lanceolate or broadly lanceolate; twigs not strikingly long; stamens 59. 
C. First few leaves at base of twigs plainly widest below the middle of the biade; 
stipules reniform; petioles slender, nearly terete. E. ; 
S. amygdaloides Anders. (Peach Willow) 
CC. First few leaves at base of twigs mostly widest at or above the middle of the 
blade; stipules ovate; petioles wide, plainly grooved. W.C. E. (S. con- 
gesta; S. laevigata congesta.) 
S. laevigata Bebb (Smooth Willow) 
Subgenus. PENTANDRAE—Tall shrubs or trees (ours); bark reddish-brown; 
twigs and buds olive or reddish-brown or yellowish, shining. Leaves large, lanceolate or 
elliptical, acute to acuminate, closely glandular-serrate specially near the base, glabrous; 
petiole glandular near where it joins the blade (ours) or naked; stipules small or none. 
Aments stout, dense, oblong, on short lateral leafy twigs; scales pale-yellow, deciduous, 
thinly pilose at base. Stamens 5—8 (ours). Capsule 5—9 mm. long, glabrous; pedi- 


