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An oak is a hardwood tree or shrub in the genus Quercus of the beech family.They have spirally arranged leaves, often with lobed edges, and a nut called an acorn, borne within a cup.
The male flowers form long drooping catkins that are yellow-green in color. The female flowers have very small spikes in leaf axils that appear with the leaves. [8] Form: Though usually found as a shrub, given enough moisture it can become a medium-sized tree that reaches up to 18 m (60 ft) tall with a spreading round crown. [10]
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.
Conversely, oak groves in wetter areas that historically had closed canopies of large trees are becoming crowded with young oaks that grow thin and spindly, due to lack of fires that would clear out seedlings. [15] Chionodes petalumensis caterpillars feed on oak leaves, including those of Quercus garryana [20] and valley oak (Q. lobata). [21]
Cherrybark oak occurs on moist, bottomland sites, while southern red oak typically occurs in drier uplands sites with poor soil. Leaves of southern red oak generally have rounded (U-shaped) bases and fewer, more irregularly shaped lobes than cherrybark. The bark is distinctly different in cherrybark oak and southern red oak.
The leaf width is approximately one half its length. Each leaf is matte green with an underneath pale green appearance; moreover, the leaf is covered with abundant soft fuzz, yielding an almost velvety feeling. When a fresh leaf is rubbed or broken, an aromatic scent is exuded, evoking a forest odor. The wood is a dull brown approaching yellow.
Quercus imbricaria, the shingle oak, is a deciduous tree in the red oak group of oaks. It is native primarily to the Midwestern and Upper South regions of North America . Description
Quercus lyrata, the overcup oak, is an oak in the white oak group (Quercus sect. Quercus). The common name, overcup oak, refers to its acorns that are mostly enclosed within the acorn cup. [ 3 ] It is native to lowland wetlands in the eastern and south-central United States, in all the coastal states from New Jersey to Texas , inland as far as ...
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