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Leaf Galls on a eucalyptus leaf
Gypsy moth (Lymantria dispar) on an apple tree closeup
fresh acorns of Quercus cerris tree
Acorns on a branch, beauty in nature
Oak is a plant growing in Estonia
acorns on a tree branch
Clusters of young acorns appearing on an English Oak tree in a country park in South East London.
Acorns and oak leaves close up on an oak tree
Sessile Oak (Quercus petraea) - Küre Mountains National Park
green acorns on an oak tree
Cork Oak (Quercus suber) tree. Luogosanto. Province of Sassari. Sardinia. Italy.
Quercus robur - English Oak acorns on the tree in autumn
Natural green acorn of unripe wild walnut against a trunk
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
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open hedgehog with chestnuts inside hanging on a tree in a forest in Tuscany, Italy. Chestnuts harvest period.
oak apple gall from an Oregon Oak that was induced by the California gallfly Andricus californicus, Andricus quercuscalifornicus.
Red oak (lat. Quercus rubra) blooms, inflorescences bloom. Red oak (lat. Quercus rubra) is a tree, a species of the genus Oak of the Beech family (Fagaceae). Spring.
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.
Acorns on tree agianst blue sky
Oak tree leaves and branches
Crataegus azarolus unripe fruit
Sycamore Tree and Blue Sky
Chestnut gall wasp, caused by dryocosmus kuriphilus an insect originating from Asia
Oak branches with autumn foliage, autumn season.
Yellow-green oak leaves on a tree in autumn, Crimea
Green natural fresh hazelnut
Free Images: "bestof:Knopper gall on oak (Quercus robur) induced by Andricus quercuscalicis (gall wasp), Arnhem, the Netherlands.jpg 51 945376 5 852365 en Knopper gall on oak"
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