d is seldom disfigured by insect enemies. Young trees have
large, deep roots, and are difficult to transplant successfully unless
they have been frequently transplanted in nurseries, from which,
however, they are seldom obtainable. Propagated from seed.

[Illustration: PLATE XXV.--Carya tomentosa.]

1. Winter buds.
2. Flowering branch.
3. Sterile flower, front view.
4. Sterile flower, side view.
5. Sterile flower, top view.
6. Fertile flower, side view.
7. Fruiting branch.

=Carya porcina, Nutt.=

_Hicoria glabra, Britton_.

PIGNUT. WHITE HICKORY.

=Habitat and Range.=--Woods, dry hills, and uplands.

Niagara peninsula and along Lake Erie.

Maine,--frequent in the southern corner of York county; New
Hampshire,--common toward the coast and along the lower Merrimac valley;
abundant on hills near the Connecticut river, but only occasional above
Bellows Falls; Vermont,--Marsh Hill, Ferrisburgh (Brainerd); W.
Castleton and Pownal (Eggleston); Massachusetts,--common eastward; along
the Connecticut river valley and some of the tributary valleys more
common than the shagbark; Rhode Island and Connecticut,--common.

South to the Gulf of Mexico; west to Minnesota, Nebraska, Kansas,
Indian territory, and Texas.

=Habit.=--A stately tree, 50-65 feet high, reaching in the Ohio basin a
height of 120 feet; trunk 2-5 feet in diameter, gradually tapering,
surmounted by a large, oblong, open, rounded, or pyramidal head, often
of great beauty.

=Bark.=--Bark of trunk dark ash-gray, uniformly but very coarsely
roughened, in old trees smooth or broken into rough and occasionally
projecting plates; branches gray; leaf-scars rather prominent; season's
shoots smooth or nearly so, purplish changing to gray, with numerous
dots.

=Winter Buds and Leaves.=--Lateral buds smaller than in _C. tomentosa_,
oblong, pointed; terminal, globular, with rounded apex; scales numerous,
the inner reddish, lengthening to 1 or 2 inches, not dropping till after
expansion of the leaves. Leaves pinnately compound, alternate, 10-18
inches long; petiole long and smooth; stipules none; leaflets 5-7,
opposite, 2-5 inches long, yellowish-green above, paler beneath, turning
to an orange brown in autumn, smooth on both sides; outline, the three
upper obovate, the two lower oblong-lanceolate, all taper-pointed; base
obtuse, sometimes acute, especially in the odd leaflet.

=Inflorescence.=--May. Sterile and fertile flowers on t