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Quercus robur (from the Latin quercus, "oak" + robur derived from a word meaning robust, strong) was named by Carl Linnaeus in Species Plantarum (1753). [11] [12] It is the type species of the genus and classified in the white oak section (Quercus section Quercus). [13] It has numerous common names, including "common oak", "European oak" and ...
Chart illustrating leaf morphology terms The following terms are used to describe leaf morphology in the description and taxonomy of plants. Leaves may be simple (that is, the leaf blade or 'lamina' is undivided) or compound (that is, the leaf blade is divided into two or more leaflets ). [ 1 ]
Chart illustrating 61 morphological terms describing leaf shape, margins and venation. While Diliff's mega-panoramas are a hard act to follow, I thought I would throw the metaphorical hat into the ring with this illustration. I created it with the desire to make a richly encyclopedic image/poster with lots of information about leaf morphology.
Leaf Base Shape: Semiamplexicaul – the leaf base wraps around the stem, but not completely. Leaf Blade Apex: Acuminate – narrowing to a point (a term used for other structures, too). Acute – with a sharp, rather abrupt ending-point. Acutifolius – with acute leaves. Attenuate – tapering gradually to a narrow end. Leaf Blade Margins:
Quercus sinuata var. sinuata (Latin quercus, "oak" + sinuata, species epithet from nominative feminine singular of Latin sinuatus [12], participle of sinuo, "to bend or bow out in curves" [13] + var. (variety or varietas) sinuata, to distinguish this taxon from the generally more shallowly lobed variety of this species, var. breviloba) is an ...
The leathery leaves are alternate and are 2.5 to 10 cm (1 to 4 in) long and 1.2 to 6.5 cm (1 ⁄ 2 to 2 + 1 ⁄ 2 in) wide. The shape varies between round, oval and lanceolate-oval. The leaf blade has five to seven sharp teeth on both edges and a pointed vegetation cone (apex).
Although live oaks retain their leaves nearly year-round, they are not true evergreens.Live oaks drop their leaves immediately before new leaves emerge in the spring. 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 sum
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.
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