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

Interactions where Quercus petraea x robur = Q. x rosacea is the victim or passive partner (and generally loses out from the process)

The following relationships have been collated from the published literature (see 'Interaction References').

Filters:

Affected Part Summary Taxon Vernacular Classification References Darwin Classification of Active Taxon Active Taxon Active Vernacular Active Taxon Uncertain Active State Active Part Active Stage Relationship Relationship Uncertain Relationship Geography Darwin Classification of Passive Taxon Passive Taxon Passive Vernacular Passive Taxon Uncertain Passive State Passive Part Passive Stage Passive Taxon's significance to Active Taxon Indoors etc Season Summary
is parasitised by UK/Ireland Erysiphe alphitoides Oak Mildew Erysiphales: Erysiphaceae An Introduction to British Powdery Mildews, Ing, B., 1990
/Fungi/Ascomycota/Leotiomycetes/Erysiphales/Erysiphaceae/Erysiphe alphitoides/Erysiphe alphitoidesoak mildew Foodplant / parasiteUK and/or Eire /Plantae/Tracheophyta/Magnoliopsida/Fagales/Fagaceae/Quercus petraea x robur = Q. x rosacea/Quercus petraea x robur = Q. x rosaceahybrid oak parasitises

Author & YearTitleSource
Ing, B., 1990An Introduction to British Powdery MildewsMycologist Vol 4 (1) et seq.

Quercus petraea x robur = Q. x rosacea (hybrid oak) may also be included in 'fed on by' relations listed under the following higher taxa:

Taxonomic hierarchy:
Species hybridQuercus petraea x robur = Q. x rosacea (hybrid oak)
GenusQuercus (oaks)
FamilyFAGACEAE (forest trees)
OrderFAGALES (forest trees)
SubclassEU-DICOTS (dicotyledonous flowering plants)
ClassMAGNOLIOPSIDA (flowering plants)
PhylumTRACHEOPHYTA (vascular plants)
KingdomPLANTAE (plants)
DomainEukaryota (eukaryotes)
LifeBIOTA (living things)
NBNNBN (data.nbn.org.uk) has a distribution map for Quercus petraea x robur = Q. x rosacea (hybrid oak)

Identification Works

Handling & MagnificationAuthorYearTitleSource
Crawley, M. 2005 The Flora of Berkshire 1375pp, Brambleby Books

Quercus petraea x robur = Q. x rosacea (hybrid oak) may also be included in identification literature listed under the following higher taxa:

General Works

AuthorYearTitleSource
Valentine, D.H. Geographical distribution and isolation in some British ecospecies Dandy, J.E. The Watsonian vice-county system, 9pp, The Study of the Distribution of British Plants

Literature listed under the following higher taxa may also be relevant to Quercus petraea x robur = Q. x rosacea (hybrid oak):

BioImagesBioImages (www.bioimages.org.uk) has 8 images of Quercus petraea x robur = Q. x rosacea (hybrid oak)

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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