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Quercus robur, the pedunculate oak or English oak, [3] [4] is a species of flowering plant in the beech and oak family, ... An oak knopper gall Marble galls on oak twig.
Agrilus angelicus, known generally as the oak twig girdler or Pacific oak twig girdler, is a species of metallic wood-boring beetle in the family Buprestidae. It is found in North America. [1] [2] [3]
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 ...
Oregon white oak is the only native oak species in British Columbia, Washington, and northern Oregon. In these areas, oak woodlands are seral, or early-successional; they depend on disturbance to avoid being overtaken by Douglas-fir (Pseudotsuga menziesii). The disturbance allowing oak to persist in an area that would otherwise succeed to ...
Quercus petraea, commonly known as the sessile oak, [3] Cornish oak, [4] Irish oak or durmast oak, [5] is a species of oak tree native to most of Europe and into Anatolia and Iran. The sessile oak is the national tree of Ireland , [ 6 ] and an unofficial emblem in Wales [ 7 ] and Cornwall .
Several oak trees hold cultural importance; such as the Royal Oak in Britain, [116] the Charter Oak in the United States, [117] and the Guernica oak in the Basque Country. [118] " The Proscribed Royalist, 1651 ", a famous painting by John Everett Millais , depicts a Royalist hiding in an oak tree while fleeing from Cromwell's forces.
Dryocosmus dubiosus is an abundant species of cynipid wasp that produces galls on oak trees in California in North America. [1] [2] Commonly known as the two-horned gall wasp, the wasp oviposits on the leaves and catkins of coast live oaks and interior live oaks. [1] After the eggs hatch, the resulting gall form looks like it has a set of bull ...
The larva which is rather elongate, with strong knob-shaped protuberances, altogether bearing a remarkable likeness to an oak twig is brown, now with a tinge of purple, now of greenish, the ventral surface paler greenish brown.It feeds on oak, birch, and lime.