CONIFERJE. (PINE FAMILY.) 431 
long, sometimes pubescent at maturity, like the branchlets. ‘Fertile aments 
3!- 4! long. 
The Wzzrrxc-WinLow (S. Babylonica, Tourn.), and the YELLOW WILLOW 
or GOLDEN Oster (S. vitellina, Smith), are introduced species. 
2. POPULUS, Tourn. Corroy-Woop. POPLAR. Asrrx. 
Bracts of the aments toothed or lobed. Flowers from an oblique eup-shaped 
disk. Stamens few or numerous, with the filaments free. Stigmas elongated, 
2-parted. — Trees. Leaves ovate or roundish, on long and often laterally com- 
pressed petioles. Buds covered with imbricated, often resinous-coated scales. 
Aments slender, drooping, appearing before the leaves. 
1. P. angulata, Ait. Branches thick, smooth, and sharply angled; leaves 
large, smooth, deltoid-ovate, acute or slightly acuminate, truncate at the base, 
obtusely serrate with incurved teeth; the conspicuous veins and compressed peti- 
ole yellowish. — Banks of rivers, Florida, and northward. March and April. 
— A large tree. Leaves 6'—8' long, longer than the petiole. 
2. P. grandidentata, Michx. Branches terete; leaves round-ovate, 
acute, sinuate-toothed, hoary-tomentose when young, like the branchlets, at 
length ‘smooth, scarcely longer than the slender compressed petiole; fruiting 
aments elongated, pubescent. — Low woods in the upper districts, and ——— 
March and April. — A middle-sized tree, with smooth gray bark. Leaves 3'— 
long, and nearly of the same width. 
3. P. heterophylla, L. Branches terete; leaves ovate, mostly obtuse, 
serrate, with obtuse, incurved teeth, rounded or with a small sinus at the base, 
hoary-tomentose on both sides when young, like the nearly terete petioles and 
branchlets, at length only on the veins beneath; fruiting aments smooth. — 
_River-swamps in the middle and upper districts, Mississippi to North Carolina, 
and northward. March and April. — A large tree. Leaves 3' - 5! long. 
The LOMBARDY Porran (P. dilatata, Ait.), and the WHITE POPLAR (P. 
alba, Z.), are introduced species. 
* 
SuBCcLAss II. GYMNOSPERMUE. — 
.Ovules naked (not enclosed in an ovary), commonly sup- 
ported by an open scale or leaf, and fertilized by the direct 
application of the pollen, Veris often more'than two. 
Otom 132. CONIFERÆ. (Poe Famity.) ines 
| Nri clio rich branching statin a EE 
bearing woody 
vocum — ee Ri 
