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Trees , deciduous, to 30 m. Bark light gray, scaly. Twigs brown, 2-3 mm diam., glabrous. Buds dark brown, ovoid, distally obtuse, 2-3 mm, glabrous. Leaves: petiole 3-6 mm. Leaf blade obovate to narrowly elliptic or narrowly obovate (some cultivars oblanceolate), (50-)70-150(-200) × (20-)35-85(-100) mm, base strongly cordate, often minutely revolute or folded, margins moderately to deeply lobed, lobes rounded or retuse distally, sinuses extending 1/3-7/8 distance to midrib, secondary veins arched, divergent, (3-)5-7 on each side, apex broadly rounded; surfaces abaxially light green, glabrous or sparsely pubescent, glabrous at maturity, adaxially deep green to light green or gray, dull or glossy. Acorns 1-3, on very thin (1-2 mm diam.), flexuous peduncle (25-)35-65(-100) mm; cup hemispheric to deeply goblet-shaped, enclosing 1/4-1/2 nut or more, scales closely appressed, often in concentric rows, finely grayish tomentose; nut brown, ovoid, oblong, or cylindric, 15-30(-35) × 12-20 mm, glabrous. Cotyledons distinct. 2 n = 24.
Deciduous, broad-crowned tree to 20 (–30) m high; truck often dividing low down; branches wide-spreading. Bark hard, fissured, grey or grey-brown. Leaves variable in size, shape and colour; lamina oblong to obovate (mostly c. obovate), c. 6–12 (–15), cm long, 6–8 cm wide, thin-textured (papery), shallowly to moderately or sometimes more deeply lobed, the margin with mostly 3–5 (–7) rounded lobes on each side, rarely almost pinnatifid, usually auriculate at base but sometimes rounded, the upper surface mid-to dark green, glabrous, or occasionally a few hairs near base along midvein, the lower surface paler, grey-green, glabrous; often yellowing in autumn; petiole c. 4–10 mm long. Flowers appearing before leaves, unisexual; male flowers in pendulous catkins to 4 cm long; female flowers solitary or clustered in spikes. Acorns broad-ovoid to ovoid, ± ellipsoid or obloid, (1.5–) 2–4 cm long, solitary or paired (rarely more) on peduncle c. 1.5–8 cm long; cupule up to c. one-third as long as acorn, often less, scales compact.
A tree with large branches. It grows 36 m high and spreads 25 m across. The crown is broad and often an irregular shape. It loses its leaves during the year. The young bark is smooth and shiny but becomes cracked. The young branches are hairy. The leaves are 5-17 cm long by 2-10 cm wide. The leaves are deep green and almost without leaf stalks. The leaves have rounded lobes. There are 5-7 lobes on each side. The acorns are carried singly or in clusters of 2 or 3. The female flower occurs in the axils of leaves near the tip of young branches. The cup encloses about 1/3 of the nut. The nut is oval and 1.5-1.8 cm long by 1-1.3 cm wide.
Perennial, deciduous tree, 15-30 m high. Leaves petiolate; bright green turning dark green, paler below, blade obovate to oblong, margins wavy, 3-6-lobed on each side, with 2 small lobes or auricles at base; petioles 3-8 mm long. Flowers: in unisexual catkins; male catkins ± 5 mm in diameter, greenish yellow; female catkins 2.5 mm in diameter, brownish purple; Aug., Sep. Fruit brown, ovoid acorns, 18-30 mm long, 1-4 on long, slender stalks 50-100 mm long.
Perennial tree, 4-20 m high. Leaves deciduous, ovate-oblong 50-140 x 35-60 mm, margins with deep rounded lobes, base auriculate. Acorn 15-25 mm long, enclosed for its lower third in the cup which is formed from closely appressed-hairy scales.
