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Quercus georgiana leaves Brown winter leaves on Georgia oak. The shiny green leaves are 4–13 centimeters (1 + 1 ⁄ 2 –5 inches) long and 2–9 cm (1– 3 + 1 ⁄ 2 in) wide, with a 0.6–2.3 cm (1 ⁄ 4 –1 in) petiole, and five irregular, pointed, bristle-tipped lobes; they are glabrous (hairless), except for small but conspicuous tufts of hairs in the vein axils on the underside.
An oak knopper gall Marble galls on oak twig. Within its native range, Q. robur is valued for its importance to insects and other wildlife, supporting the highest biodiversity of insect herbivores of any British plant (at least 400 species). [21] The most well-known of these are the ones that form galls, which number about 35.
– Chinkapin oak – eastern, central, and southwestern US (West Texas and New Mexico), northern Mexico; Quercus ningqiangensis S.Z.Qu & W.H.Zhang – southeastern China; Quercus oblongifolia Torr. – Arizona blue oak, Southwestern blue oak, or Mexican blue oak – # southwestern U.S., northwestern Mexico; Quercus obtusata Bonpl. – Mexico
The adult female lays eggs in the cambium layer of oak twigs during the fall using her ovipositor. [4] More vigorous twigs will have more galls. The eggs overwinter on the twig, and then hatch in the spring, usually in early April. The resulting larvae induce galls immediately, where they can seem to balloon almost overnight onto the tree.
The leaves and twigs. Twigs: The twigs are thick and brown or gray, hairy when young. The buds are egg-shaped with a pointed tip, angular, and hairy. In some regions, the twigs commonly bear galls. [3] Flowers: Cherrybark oak is monoecious; staminate and pistillate catkins are borne separately on the same tree. Catkins are borne on stalks from ...
Twig: medium-sized, fuzzy. The color can be light brown or reddish brown. Twigs have pointy and fat clusters of terminal buds. [7] Leaves: alternate, evergreen, simple, and oblong. The color is yellowish green or bluish green. Leaves are usually 1 1 ⁄ 2 to 3 1 ⁄ 2 in long. The margins are usually entire or toothed, and are rounded at the base.
The young bark of the Shumard oak is light gray, very smooth, and very reflective. Shumard oak bark darkens and develops ridges and furrows as it ages. Occasionally, white splotches are seen on the bark. [6] Shumard oak twigs terminate in a cluster of buds. The buds are lighter in color than the olive-green twigs. The young twig is highly ...
Quercus marilandica is a small deciduous tree growing to 15 meters (49 feet) tall, with bark cracked into rectangular black plates with narrow orange fissures. The leaves are 7–20 centimeters (3–8 inches) long and broad, and typically flare from a tapered base to a broad three-lobed bell shape with only shallow indentations.