As a consequence of its dry habitat and ridgetop exposure,
Quercus montana is not usually a large tree, typically growing to tall; specimens growing in better conditions can grow up to tall. It tends to have a similar spread of . A 10-year-old sapling grown in full sun will stand about tall. This species is often an important canopy species in an
oak-heath forest. It is readily identified by its massively-ridged dark gray-brown
bark, the thickest of any eastern
North American oak. The
leaves are long and broad, shallowly lobed with 10–15 rounded lobes on each margin; they are virtually identical to the leaves of
swamp chestnut oak and
chinkapin oak, but the trees can readily be distinguished by the bark, that of the chinkapin oak being a light ash-gray and somewhat peeling like that of the
white oak and that of swamp chestnut oak being paler ash-gray and scaly. The chinkapin oak also has much smaller
acorns than the chestnut oak. The chestnut oak is easily distinguished from the
swamp white oak because that tree has whitened undersides on the leaves. Another important distinction between the chestnut oak and the swamp chestnut oak is by the habitat; if it grows on a ridge, it is chestnut oak, and if it grows in wet bottomlands, it is probably the more massive swamp chestnut oak; however, this is not fully reliable.
Characteristics include: • Bark: Dark, fissured into broad ridges, scaly. Branchlets stout, at first bronze green, later they become reddish brown, finally dark gray or brown. Heavily charged with tannic acid. • Wood: Dark brown, sapwood lighter; heavy, hard, strong, tough, close-grained, durable in contact with the soil.
Specific gravity 0.7499; weight of cubic foot, . • Winter buds: Light chestnut brown, ovate, acute, one-fourth to one-half of an inch long. • Leaves:
Alternate, long, wide,
obovate to oblong-
lanceolate, wedge-shaped or rounded at base, coarsely
crenately toothed, teeth rounded or acute, apex rounded or acute. They come out of the bud
convolute, yellow green or bronze, shining above, very pubescent below. When full grown are thick, firm, dark yellow green, somewhat shining above, pale green and pubescent below; midribs stout, yellow, primary veins conspicuous. In autumn they turn a dull yellow soon changing to a yellow brown.
Petioles stout or slender, short.
Stipules linear to lanceolate,
caducous. • Flowers: May, when leaves are one-third grown.
Staminate flowers are borne in hairy
catkins (aments) two to three inches long;
calyx pale yellow, hairy, deeply seven to nine-lobed;
stamens 7 to 9;
anthers bright yellow.
Pistillate flowers in short
spikes;
peduncles green, stout, hairy;
involucral scales hairy; stigmas short, bright red. • Acorns: Annual, singly or in pairs; nut oval, rounded or acute at apex, bright chestnut brown, shining, one and a quarter to one and one-half inches in length; cup, cup-shaped or
turbinate, usually enclosing one-half or one-third of the nut, thin, light brown and downy within, reddish brown and rough outside,
tuberculate near the base. Scales small, much crowded toward the rim sometimes making a fringe. Kernel white, sweetish. The acorns of the chestnut oak are long and broad, among the largest of Native American oaks, surpassed in size only by the
bur oak and possibly swamp chestnut oak. == Taxonomy and nomenclature ==