CXXVIT. BALSAMIFLU. 507 
Bins P 
dant, is found in woods and fields, disseminated throughout N. England and 
Canada. With a trunk 18’ diam., it arises 60—70f. The buds of this 
species, as well as of most of the poplars, are covered with an aromatic resin, 
~ which may be separated in boiling water. April. 
_ 5. P. Moniiréra. Ait. Necklace Poplar. 
ws. subcordate-deltoid, smooth, glandular at base, with cartilaginous, 
hairy, hooked serratures; veins spreading; petioles compressed above; older 
branches terete; fertile aments long and pendulous.—Banks of the Hudson, near 
Troy, N. Y., apparently native. Beck. A. tree 60—70f high, with a cylindric 
trunk. Leaves 2i—4’ diam., on long petioles. April. 
6. P. HETEROPHYLLA. Various-leaved Poplar. 
Iws. roundish-ovate, obtuse, uncinately toothed, cordate and somewhat 
auricled at base, the sinus small, tomentose when young.—A tree 60—70f high, 
found in swamps. Branches cylindric. Leaves with auriculate lobes at base, 
which often conceal the insertion of the petiole. May. = 
- 7. P. canpicans. Ait. Balm-of- Gilead. a 
Iws. ovate-cordate, acuminate, obtusely and unequally serrate, whitish 
beneath, reticulate-veined, somewhat 3-veined; petioles hirsute; buds resinous; 
branches terete.—This tree is sometimes met with in New England, growing 
about houses as a shade tree. It is 40—50f high, and 18—30’ in diameter. 
Bark smooth, greenish. Foliage copious, dark green. Apr. 
8. P. pavicata. Ait. (P. Canadensis. Michz. and 1st. edit.) River Poplar. 
Cotton Tree-—Lwvs. roundish-ovate, deltoid, acuminate, subcordate, une- 
qually serrate, shining, smooth, glandular; petioles compressed ; younger branches 
angled.—The cotton-tree grows 70—80f high in N. Y. and ve The fertile 
aments are 6—8’ long, and pendulous. The seeds are clothed with a white, 
cotton-like down which gives name to the tree. Buds sealed against the frosts 
and rains with resin. April. ! rg 
rs erie 
9. P. ancutaAta. Water Poplar. Western Cotton Tree. / 
Lvs. ovate-deltoid, subcordate, uncinate-serrate, acuminate, glabrous, 
younger ones broadly cordate; branches winged, angular.—A tree of noble di- 
mensions, growing along the rivers of the Southern and Western States. Trunk 
40—80f high, 1—2f diam., bearing a broad summit, with coarse branches and 
branchlets. Leaves on adult trees 2—3’ long, about the same width, truncate 
at base; on younger trees they are 2 or 3 times larger, with a cordate base. 
Petioles longer than the leaves, compressed near the base of the lamina. Branch- 
lets remarkably thick, greenish, spotted with white, striate. Buds short-ovoid, 
green, not coated with resin. Timber not valuable. March, April. 
10. P. pitatata. Lombardy Poplar—Lvs. smooth, acuminate, deltoid, ser- 
rate, the breadth equaling or exceeding the length; trunk lobed and sulcate — 
This tree is native in Italy as its name imports. It was early brought to this 
country, and has beet. pian d about many a dwelling and in village streets. 
Its rapid growth is the only commendable quality it possesses, while the huge 
worms by which it is often infested render it a nuisance. 
11. P. anpa. Adele or Silver-leaf Poplar —Lws. cordate, broad-ovate, lobed 
and toothed, acuminate, dark green and smooth above, very white-downy be- 
neath ; fertile aments ovate; stigmas 4.—A highly ornamental tree, native of 
Europe. Nothing can be more striking than the contrast between the upper 
and lower surface of the leaves. 
te 
Orver CXXVIII BALSAMIFLU#.—Liqumammars. 
Trees with alternate, simple or lobed leaves, with glandular serratures and deciduous stipules. 
Aments monecious, roundish, with achlamydeous flowers. 
Sterile.—Anth. numerous, oblong, subsessile, with scales intermixed. 
Fertile.—Ova. 2-celled, collected into a globe, each surrounded by a few scales. 
Styles 2, long. Fr. a kind of strobile, composed of the indurated scales and capsules. 
Caps, 2-beaked, 2-celled, opening between the beaks. Sds. several, winged. 
Genus 1, species 3, natives of India, Levant and North America. The fragrant resin, léguid sturaz, is 
the product of some of the species. ‘ 
AO 
