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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 .
The common spangle gall on the underside of leaves and the currant gall on the male catkins or occasionally the leaves, develop as chemically induced distortions on pedunculate oak (Quercus robur), or sessile oak (Quercus petraea) trees, caused by the cynipid wasp [1] Neuroterus quercusbaccarum which has both agamic and bisexual generations.
Leaves and acorns of the sessile oak. The national tree of the Republic is the sessile oak (Quercus petraea), declared as such in 1990 by Taoiseach Charlie Haughey. [26] [27] Other accounts give the strawberry tree (Arbutus unedo) as the national tree. [28]
The leaves of the pedunculate oak have a lobed base, whereas those of the sessile oak have a wedge-shaped base. The leaf venation of the pedunculate oak is dense, while that of the sessile oak is sparse, and the leaf shape is more regular. Additionally, the bark of the pedunculate oak is thick and cracked, with deep vertical ridges, while the ...
The tree has a girth of 14.02 metres (46.0 ft) measured at 1.5 metres (4 ft 11 in) off the ground, making it the UK's largest and widest tree since the collapse of the Newland Oak in Gloucestershire, [1] [2] [3] surpassing trees such as the Bowthorpe Oak in Lincolnshire and the three large sweet chestnut trees at Canford School, Dorset. [3]
Liebl. – sessile oak, durmast oak – Europe, Anatolia. Quercus petraea subsp. polycarpa (Schur) Soó - Georgian oak - Austria to Iran and the Caucasus; Quercus petraea subsp. pinnatiloba (K.Koch) Menitsky - Lebanon-Syria, Turkey, South Caucasus; Quercus polymorpha Schltdl. & Cham. – Monterrey oak, Mexican white oak – # Mexico and extreme ...
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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, Fagaceae. It is a large tree, native to most of Europe and western Asia , and is widely cultivated in other temperate regions.