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Macro photo of tree pests larvae or galls on oak leaves isolated on white background.
Acorns on a branch, beauty in nature
fresh acorns of Quercus cerris tree
Leaf Galls on a eucalyptus leaf
Oak is a plant growing in Estonia
Colorful autumn leaves.
green acorns on an oak tree
acorns on a tree branch
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leaf of oak tree isolated
Sessile Oak (Quercus petraea) - Küre Mountains National Park
Green oak leaves and acorns
Tufty catkin strings of oak blossom on a bright, fresh green-leaved English oak tree in springtime. The long flower strings are the male flowers (catkins) while the female flowers are small and located on small stalks called peduncles. The catkins release their pollen in the spring, fertilising the red female flowers, which develop into acorns by autumn.
Quercus robur tree branch close up
Cork Oak (Quercus suber) tree. Luogosanto. Province of Sassari. Sardinia. Italy.
Chestnut gall wasp, caused by dryocosmus kuriphilus an insect originating from Asia
Natural green acorn of unripe wild walnut against a trunk
Acorns and oak leaves close up on an oak tree
oak apple gall from an Oregon Oak that was induced by the California gallfly Andricus californicus, Andricus quercuscalifornicus.
Oak branches with leaves and fruits of acorns. An oak is a hardwood tree or shrub in the genus Quercus of the beech family. Spirally arranged leaves. The acorn, or oaknut.
Clusters of young acorns appearing on an English Oak tree in a country park in South East London.
Acorns on tree agianst blue sky
The gall wasp (Andricus quercuscalicis) lays its eggs inside the acorn itself, causing it to mutate. When the infestation first appeared some thought it might wipe out England's oak trees. However, although these galls affect individual acorns and their cups, the net effect is not disastrous. Knopper galls were first recorded in the UK in the 1960s. They have spread rapidly across the country, until now they are one of the commonest oak galls across all England. The name 'pedunculate oak' refers to the situation of the acorns, which arise from long stems (peduncles), as distinguished from the 'sessile oak', where the acorns sit directly on the oak twigs.
Fencing acorns wet from rain
Sycamore Tree and Blue Sky
Yellow-green oak leaves on a tree in autumn, Crimea
Oak branches with autumn foliage, autumn season.
Close up of acorns in a oak tree
Selective focus on the green leaves of an oak tree in a public park. Autumn morning in Metro Vancouver.
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