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The leaves of the black oak are alternately arranged on the twig and are 10–20 cm (4–8 in) long with 5–7 bristle-tipped lobes separated by deep U-shaped notches. The upper surface of the leaf is a shiny deep green, and the lower is yellowish-brown. There are also stellate hairs on the underside of the leaf that grow in clumps. [5]
The leaves of this species serve as food for some caterpillars and the solitary leaf-cutter bee Megachile rubi cuts pieces from the leaves to line the cells of its nest. [ 7 ] Deer do not tend to browse young B. lenta allowing trees to grow in areas with high deer populations, Betula alleghaniensis , a close relative of B. lenta, is, however ...
Bark: Light gray, varying to dark gray and to white; shallow, fissured and scaly. Branchlets start out as bright green, later turn reddish-green, and finally, light gray. A distinguishing feature of this tree is that a little over halfway up the trunk, the bark tends to form overlapping scales that are easily noticed and aid in identification. [7]
The bark is gray with distinct vertical ridges. [3] The leaves are 7–15 cm (2 + 3 ⁄ 4 –6 in) long and 5–13 cm (2–5 in) broad, variable in shape, with a lobed margin. Most often, the basal two-thirds is narrower and deeply lobed, while the apical third is wider and has shallow lobes or large teeth.
The name "chalk maple" (in addition to the Latin name, meaning "white skin") comes from the attractive smooth and thin chalky white or light gray bark on mature trees. The bark becomes ridged and blackish at the base as it ages. The leaves are opposite and simple, 5–9 cm long and broad, often drooping at the tip. They have 5 or 3 long-pointed ...
The leaves are 12–20 centimetres (4 + 3 ⁄ 4 – 7 + 3 ⁄ 4 inches) long and 6–10 cm (2 + 1 ⁄ 4 –4 in) 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 ...
The bark is dark gray and deeply furrowed. The leaves are 8–20 centimetres (3 + 1 ⁄ 4 – 7 + 3 ⁄ 4 inches) long and 3–6 cm (1 + 1 ⁄ 4 – 2 + 1 ⁄ 4 in) wide, with 14–20 small saw-tooth-like triangular lobes on each side, with teeth of very regular shape. [3] The flowers are wind-pollinated catkins.
It is commonly confused for paper birch (Betula papyrifera) by means of its bark, but it is differentiable as gray birch bark does not exfoliate (peel) as readily as paper birch. It is also occasionally confused for quaking aspen (Populus tremuloides), which has similar bark, but different leaves and buds. [4]