431 
SALICACEJS. (WILLOW FAMILY.) 
mon tree 20°-50° high, with smooth greenish-white bark. Stalk 
of the leaf long slender and laterally compressed, which accounts 
breeze C ° ntmUa a S ltatlon observable in the aspens, by the slightest 
SIandidentata, Michx. (Large-toothed Aspen.) 
Leaves roundish-ovate , with large and irregular sinuate teeth , when 
young densely covered with white silky wool, at length smooth on 
both sides; scales cut into 5-6 unequal small divisions , slightly fring¬ 
ed.—An equally common and rather larger tree than the last, with a 
smoothish gray bark. 
3. P. lieterophylla, L. (Downt-leaved Poplar.) Branch¬ 
es round; leaves heart-shaped or roundish-ovate , obtuse , serrate, white- 
woolly when young , at length nearly smooth, except on the elevated 
veins beneath. — Swamps, New England and westward. — Tree 40° 
-60° high, with large, usually quite blunt leaves; the sinus, when 
heart-shaped, closed by the overlapping lobes which conceal the in¬ 
sertion of the nearly round leaf-stalk. 
4 P. monilifera. Ait. (Cotton-wood. Necklace Pop¬ 
lar.) Young branches slightly angled , becoming round ; leaves broad¬ 
ly deltoid with spreading prominent nerves , slightly heart-shaped or 
truncate at the base , taper-pointed, serrate with cartilaginous and in¬ 
curved slightly hairy teeth ; fertile catkins very long; scales lacerate- 
fringed,not hairy; stigmas nearly sessile, toothed, dilated and very 
large. — Margins of lakes and streams, New England and westward. 
— A large tree, 80° high or upwards; the vigorous branches decided¬ 
ly angled, bearing large leaves; the more stunted being round, with 
smaller foliage. (P. Canadensis, Michx. f.) 
5. P. ailgulata, Ait. (Angled Cotton-wood.) Branches 
acutely angular or winged; leaves broadly deltoid or heart-ovate , 
smooth, crenate-serrate, or with obtuse cartilaginous teeth._Penn¬ 
sylvania and southward.—Tree large as the last, and like it produc¬ 
ing very large and heart-shaped leaves (7'-8' long, and as much in 
breadth) on young plants and suckers; whilst on full-grown trees 
they are only one fourth of that size, and commonly without the sinus. 
6. P. balsamlfera, L. (Balsam Poplar. Tacamahac.) 
Branches round ; leaves ovate , gradually tapering and pointed, finely 
serrate, smooth on both sides, whitish and reticulately veined be¬ 
neath; scales dilated , slightly hairy; stamens very numerous.— N. 
New England to Wisconsin, northward. — A large, tall tree, growing 
on the borders of rivers and swamps : its large buds, as in the next, 
varnished with a fragrant resinous matter. 
4 ' €&H<licanS 9 Ait. (Balm OF Gilead.) Branches round ; 
leaves heart-shaped , pointed, serrate, white and reticulate-veined be¬ 
neath, petiole commonly hairy. — N. New England to Wisconsin.— 
tree of somewhat less stature than the last, which it very much re- 
