Flora of Northern Ireland
  • Quercus robur L. - Pedunculate Oak - Fagaceae
Quercus robur
© Alan Hill
Quercus robur
© Alan Hill
Quercus robur
© Paul Hackney
Quercus robur
(Map updated: March 2008)
 

This is one of the two native oaks of Northern Ireland. It is similar to the sessile oak Quercus petraea with which it hybridizes. The factors which determine the distributions of these two species in Northern Ireland are unclear.

The pedunculate oak has a shorter leaf stalk (petiole) than the sessile oak, and there are obvious auricles at the leaf base (absent in sessile oak). The acorns are produced in groups on a long peduncle, whereas the acorns of sessile oak have no peduncle or a very short one.

The Irish word for oak is dair, and an oak grove is daire, which has become anglicised as 'derry', a frequent component of Irish placenames.

All names: Quercus robur L.