BioImages: The Virtual Field-Guide (UK)

Quercus petraea x robur = Q. x rosacea Bechst. (hybrid oak)

Sets of Photographs

These relate to individual finds ("biological records") of the organism.

Suggested Literature

Identification Works

Crawley, M., 2005 The Flora of Berkshire

BioInfo BioInfo ( has 1 general literature references to Quercus petraea x robur = Q. x rosacea (hybrid oak)

Quercus petraea x robur = Q. x rosacea may also be covered by literature listed under:

(living things)
(vascular plants)
(flowering plants)
Quercus (native spp) (via Quercus petraea x robur = Q. x rosacea) Broadleaved trees (via Fagales) Trees Trees and shrubs Trees, shrubs, woody and climbing plants (via Broadleaved trees)

BioInfo BioInfo ( has 1 feeding and other relationships of Quercus petraea x robur = Q. x rosacea (hybrid oak)

Further Information

Notes (MWS) The hybrid between our two native oaks is very variable and very common. Back-crossing produces intermediates in all the characters which separate the parent species.

Clues to hybridity:
1. combination of characters eg stalked acorns and stellate leaf hairs
2. some leaves with base asymmetric, with a small auricle on one side but not on the other
3. greater than usual variation in shape of leaf base so that some have cuneate bases and some are weakly auricled.
4. broad leaves with rounded lobes. These forms can be quite striking and rather attractive.
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