WILLOW FAMILY. 503 
26. Salix cordata Muhl. Heart-leaved 
Willow. (Fig. 1198.) 
Salix cordata Muhl, Neue Schrift. Ges. Nat. Fr. Ber- 
lin, 4: 236. pl. 6. f. 3. . 1803. 
A shrub, 5°-12° high, the twigs puberulent or 
glabrous; young leaves pubescent. Mature leaves 
oblong-lanceolate, green on both sides or paler be- 
neath, acuminate at the apex, narrowed, obtuse or 
subcordate at the base, sharply serrulate with glan- 
dular teeth, green in drying; stipules oblique, ser- 
rulate, usually large and persistent; petioles 4/’-9/’ 
long; aments bracted at the base, expanding before 
the leaves, the staminate about 1/ long, the pistil- 
late 114’-2'4’ in fruit; scales silky, persistent; sta- 
mens 2; filaments glabrous; style short; capsules 
narrowly ovoid, acute, glabrous, 2’’—3’’ long, short- 
pedicelled. 
In wet soil, New Brunswick to British Columbia, 
south to Virginia, Missouri, Colorado and California. 
Hybridizes with S. ser?cea and other species. April- 
May. 
Salix cordata angustata (Pursh) Anders. Mon. Sal. 159. 1867. 
Salix angustata Pursh, Fl. Am. Sept. 613. 1814. 
Leaves narrower, linear-lanceolate. Range of the type. 
Salix cordata Mackenzieana Hook. Fl. Bor. Am. 2: 149. 1839. 
Smalltree. Leaves lanceolate or oblanceolate. Manitoba and Northwest Territory to California. 
27. Salix glaucophylla Bebb. Broad- 
leaved Willow. (Fig. 1199.) 
S. glaucophylla Bebb, in A. Gray, Man. Ed. 6, 485. 1889. 
A shrub, 4°-10° high, foliage glabrous or when 
young sparingly pubescent. Mature leaves ovate, 
obovate or oblong-lanceolate, firm, dark green and 
shining above, white-glaucous beneath, short- 
acuminate, the base rounded or acute, serrulate 
with gland-tipped teeth, 2/-4’ long, 14/-2’ wide; 
stipules large, persistent; petioles stout, 3//-6’’ long; 
aments expanding before the leaves, leafy-bracted 
at the base, the staminate 1/-2/ long, the pistillate 
1'4/-3/ long in fruit; scales densely white-villous, 
persistent; stamens 2; filaments glabrous; style fili- 
form; capsule beaked from an ovoid base, acute, 
glabrous, 3/’-5’’ long, slender-pedicelled. 
On sand dunes, Lake Michigan, northern Illinois and 
Wisconsin, Variable in leaf-form. April. 
28. Salix Missouriénsis Bebb. Missouri Willow. (Fig. 1200.) 
Salix cordata var. vestita Anders. Mon. Sal. 159. 1867. 
Not S. vesti/a Pursh, 1814. 
Salia Missouriensts Bebb, Gard. & For. 8: 373. 1895. 
A tree, often 50° high, the trunk sometimes 14° in 
diameter, the thin gray bark with small appressed 
scales. Twigs of the season pubescent or puberulent; 
leaves lanceolate, or oblanceolate, acuminate, finely 
serrate with minute gland-tipped teeth, rounded or 
narrowed at the base, pubescent when young, glabrous 
or nearly so when mature, green above, pale and usu- 
ally glaucous beneath, 3/-6’ long, '%4’-114’ wide; 
petioles 14’ long or less; stipules often 14’ long, per- 
sistent or deciduous; aments narrowly cylindric, un- 
folding long before the leaves, the staminate about 
134’ long, the pistillate 3/-4’ long; scales persistent, 
villous; stamens 2; filaments glabrous; style very 
short; capsule narrowly ovoid, glabrous, 3-4 times as 
long as its pedicel. 
On river banks, Missouri and Nebraska. Wood dark 
brown, March-April. 
