Intertaxon relationships
species
Orchestes quercus (Linnaeus, 1758)
Quercus cerris L. - Turkey Oak 
Quercus petraea (Matt.) Liebl. - Sessile Oak
Quercus pubescens Willd. - Downy Oak
Quercus robur L. - Pedunculate Oak
Quercus rubra L. - Northern Red Oak