Quercus durata Jeps.

국표에 없다.

Quercus durata, commonly known as leather oak, is a species of oak endemic to California, common in the Coast Ranges and the foothills of the Sierra Nevada. The common name "leather oak" is derived from the leathery texture on the lop of its leaves. Taxonomically it is placed in the white oak group (subgenus Quercus, section Quercus).

As described by English horticulturist and botanist Theodore Payne, leather oak is "A rather low spreading shrub with rigid branches, foliage rich deep green. Desirable for hillside planting." Quercus durata is a short species of oak generally growing to 1–2 metres (3+1⁄2–6+1⁄2 feet) in diameter with a height of about 0.5–1.5 m (1+1⁄2–5 ft). In more extreme cases they have been known to grow to be 3–4 m across. The gray or yellowish twigs have scaly bark and are about 1–3 centimetres (1⁄2–1+1⁄4 inches) in diameter with the trunk diameter reaching 4–5 cm; the branches can be densely or sparsely distributed. The buds are smooth brown or reddish brown ovals.

The leaf blades are cupped or convex, rarely somewhat planar; their dimensions are 1.5–3 cm long and 1–1.5 cm broad densely or sparsely distributed along the branches while the margins of the leaves can be entirely or irregularly toothed.[4] The adaxial (upper) surface of the leaves are greenish or yellowish with short semi-erect hairs; the secondary veins are obscure, dense or scattered. The abaxial (lower) surface of the leaves are covered with erect rayed hairs 1–4 millimetres (1⁄16–3⁄16 in) in length that are felty to the touch with prominent secondary veins.

The acorns of the leather oak can be found solitary or paired at the end of a small stalk; the cup which encloses up to half of the nut is reddish or yellowish with a scaly texture. The nut itself is cylindrical, measuring 1.5–2.5 cm in diameter and 1–2.5 cm long, the apex can be rounded or obtuse. Because leather oak is a species of white oak, its acorns mature in about 6 months, are hairless inside the acorn shell, and are sweet or slightly bitter tasting; the shell is mildly toxic. It is a dicot that flowers in the spring, typically April or May.

Quercus durata - Wikipedia

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