Vill. 2. THE HEART-LEAVED WILLOW. 205 
sometimes toothed, and pointed above and below, or serrate. 
The leaves, when young, are downy on both surfaces. 
This willow seems to be nearly allied to S. ¢ristis, through 
the variety called by Pursh S. reeurvdia; and connects them 
with S. conifera. Had it not been for the high authority of Dr. 
Barratt, I should have associated this with the cinereous group. 
Grove Eienta. Tue Corpare Wittows. Cordate Barratt. 
Amenis shghily stalked, ovate, cylindrical, expanding with 
the leaves. Scales subciliate, red or yellowish. Stamens two or 
three. Ovaries stalked, smooth. Leaves cordate, or attenuate 
at base, smooth. Stipules half-heart-shaped, serrate. Tall shrubs 
with dichotomous, flexible, smooth branches—Barratt. 
‘The aments in this section are invested with a double cov- 
ering; the outer being a hard scale or shield; the inner, a thin 
membranous envelope. This last is generally ruptured trans- 
versely, and is elevated like a cap or calyptra on the summit of 
the expanding ament. This membrane is sometimes found ad- 
hering to the inner surface of the hard scale or shield. It is 
most periectly formed in S. Torreydna. and next in S. cordita. 
Both these species of willow begin to expand their filaments at 
the apex of the aments. ‘The floral leaves (four or five) are 
from half to three quarters of an inch long. The fertile aments 
of S. rigida, the largest of this section, when ripe, form a densely 
fruited raceme three to four inches long. The mature germens 
are sub-rhomboidal at the base, and somewhat flattened, vary- 
ing in color from green to a reddish brown.”-——Barratt. 
Sp. 19. Tue Heart-tzavep Wittow. WS. corddta. Willdenow. 
Leaf figured in Annals of Botany, I, Plate V, fig. 3. 
Leaves oblong, lanceolate, acuminate, heart-shaped, rarely acute at base, 
sharply serrate, smooth, paler beneath; stipnles large, ovate-roundish, cartila- 
ginous-serrate ; aments expanding with the leaves ; stamens about three ; scales 
lanceolate, woolly, black ; ovaries stalked, lanceolate, smooth; style very short; 
stigmas cleft.—Hooker, Fl. Bor. Am., II, 149. Pursh, IT, 615. Waelldenow, 
IV, 666. Muhlenberg, Ann. Bot., I, 64. 
This is a beautiful low tree, varying from eight or ten, to 
twelve or fifteen, and even twenty or more feet in height. 
