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The leaves and twigs can also provide browse for white-tailed deer. [6] Oak wilt can attack all red oaks, including the Shumard oak. Other diseases that attack Shumard oaks are various fungi that can grow on the leaves, powdery mildew, canker diseases, and shoestring root. [6] [failed verification]
They usually turn red or brown in autumn, but depending on climate, site, and individual tree genetics, some trees are nearly always red, or even purple in autumn. Some dead leaves may remain on the tree throughout winter until very early spring. The lobes can be shallow, extending less than halfway to the midrib, or deep and somewhat branching.
The leaves turn brown, russet or yellow in fall and sometimes remain attached to the twigs until the following spring. The light brown acorns mature in about 6 months. They are 15–35 mm ( 5 ⁄ 8 – 1 + 3 ⁄ 8 in) long, egg shaped, usually with a blunt apex.
Occasionally, senescing leaves may turn yellow or contain brown spots in the winter, leading to the mistaken belief that the tree has oak wilt, whose symptoms typically occur in the summer. [7] A live oak's defoliation may occur sooner in marginal climates or in dry or cold winters. [8] The bark is dark, thick, and furrowed longitudinally.
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.
The petioles are 4–15 mm (rarely to 22 mm) long, stout and pubescent. The leaves are persistent late into the autumn, remaining green up to early winter. They eventually turn russet or brown and fall off. The Quercus pubescens acorns are light brown to yellow, 8–20 mm long, usually thin and pointed. The acorn cups are light gray to almost ...
Gambel oak leaves. Bark on a mature Gambel oak. ... turning from green to golden brown. ... The tree typically grows at altitudes of 1,000–3,000 m (3,300–9,800 ft ...
Its blue-green leaves are oblong and shallowly lobed to unlobed, but shade leaves can be deeply lobed; they most often turn yellow or brown in autumn. [3] [5] Quercus laceyi has often been confused with Quercus glaucoides, which is an evergreen oak native to central and southern Mexico. [4]
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