Roteiche
"Quercus rubra" has effective ectomycorrhizal relationships that have been correlated with increased growth rates. Northern red oak trees have been shown to increase growth in the presence of various ascomycetes that coil at the base of the oak trunk. The fungi, which eventually proliferate at the stumps of deciduous trees, have been found to be host-specific to both "Quercus rubra" and "Quercus montana" and primarily promote growth upon infection.