SALICACE. SILVA OF NORTH AMERICA. 119 
SALIX BONPLANDIANA. 
Willow. 
Leaves linear-lanceolate or oblong-lanceolate, often falcate, silvery white on the 
lower surface, persistent during the winter. 
Salix Bonplandiana, Humboldt, Bonpland & Kunth, Nov. Salix pallida, Humboldt, Bonpland & Kunth, Nov. Gen. e 
Gen. et Spec. ii. 24, t.101, 102 (1817). — Kunth, Syn. Pl. Spec. ii. 25 (1817). — Kunth, Syn. Pl. Aquin. i. 366. 
Aiquin. i. 365.— Trautvetter, Mém. Sav. Etr. Acad. Salix Bonplandiana, subspec. pallida, Andersson, Svensk. 
Sct. St. Pétersbourg, iii. 610. — Dietrich, Syn. v. 419. — Vetensk. Akad. Hand. ser. 4, vi. 18 (Monographia Sali- 
Andersson, Svensk. Vetensk. Akad. Hand. ser. 4, vi. 18, cum) (1867). 
t. 1, £. 14 (Monographia Salicum) ; De Candolle Prodr. Salix Bonplandiana, 8 pallida, Andersson, De Candolle 
xvi. pt. ii. 200.— Hemsley, Bot. Biol. Am. Cent. iii. Prodr. xvi. pt. ii. 200 (1868). — Hemsley, Bot. Biol. Am. 
179. — Bebb, Garden and Forest, viii. 364. Cent. iii. 179. 
In the United States a tree rarely more than thirty feet in height, with a trunk twelve or fifteen 
inches in diameter, and rather slender erect and spreading branches, often pendulous at the extremities, 
which form a broad round-topped head. The bark of the trunk is from one half to three quarters of 
an inch in thickness, dark brown or nearly black, and deeply divided by narrow fissures into broad flat 
ridges which separate on the surface into closely appressed scales. The branchlets are slender, glabrous, 
and marked with occasional pale lenticels, light yellow at first, light or dark red-brown and lustrous at 
the end of their first season, and paler and orange-brown in their second year. The buds are narrowly 
ovate, long-pointed, more or less falcate, bright red-brown, lustrous, and nearly a quarter of an inch in 
length. The leaves are involute in the bud, linear-lanceolate or oblong-lanceolate, gradually narrowed 
and often unequal at the wedge-shaped base, acuminate at the apex with long slender points, and 
obscurely serrate with minute glandular teeth or entire with slightly revolute margins; they are thick 
and firm in texture, reticulate-venulose, glabrous, yellow-green and lustrous on the upper surface, silvery 
white on the lower, from four to six inches long and from one half to three quarters of an inch wide, 
with broad yellow midribs and slender arcuate primary veins conspicuous on the upper side; they are 
borne on stout reddish grooved petioles, and, beginning to fall irregularly durmg the winter, do not 
entirely disappear until after the expansion of the flowers in February; those at the base of the shoot 
are scale-like, obovate, and coated with rufous silky hairs, and fall soon after the opening of the bud, 
when they are not more than an inch long. The stipules are ovate, rounded, slightly undulate, thin 
and scarious, puberulous, from an eighth to a quarter of an inch broad, and often persistent during the 
summer. The aments are short-stalked and erect on leafy branches, with small often deciduous leaves 
which fall from those of the pistillate tree before the fruit ripens; they are slender and cylindrical, and 
on the staminate plant are from an inch to an inch and a half in length and somewhat longer than 
those of the pistillate plant; their scales are broadly obovate, rounded at the apex, light yellow, villous 
on the outer face and glabrous or slightly hairy above the middle on the inner face. The stamens are 
usually three in number, with free filaments slightly hairy at the base only. The ovary is slender, 
oblong-conical, glabrous, and crowned with two nearly sessile much thickened club-shaped stigmas, the 
short stalk being surrounded by the large irregular cup-shaped glandular disk. The capsule is ovate- 
conical, rounded at the base, rather long-stalked, and light reddish yellow. 
Saha Bonplandiana is widely distributed through central and southern Mexico, and in Arizona 
