Oak, sessile
Quercus petraea
Origin: native
Type: deciduous
Height: up to 20-40m high
Winter buds: orange brown colour, more than 20 waxy scales, a cluster of terminal buds.
Leaves: simple, alternate, 5-8 pairs of lobes, base of leaf tapers to stalk, 12-20 mm stalk.
Flowers: slender male catkins and pinkish brown female flowers on the end of new shoots.
Fruit: almost stalkless acorns.
Distribution: common in western Britain.
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Sessile oak in spring (Chris Mattison/Alamy) -
Sessile oak in summer (Clive Jones/Alamy) -
Sessile oak in autumn (Purple Marbles Garden/Alamy) -
Sessile oak with stalkless acorns (Arterra Picture Library/Alamy)
Not to be confused with

Oak, pedunculate
Pedunculate oak has acorns with stalks (Ben Lee/WTML)