Coefficient of Conservatism:
Coefficient of Wetness:
SWAMP WHITE OAK
Floodplains, swamps, margins of vernal pools, and other poorly drained sites.
The undersides of the leaves in this species are usually more densely stellate-tomentose than in Quercus prinoides, Q. montana, and Q. muehlenbergii, feeling rather velvety to the touch. The very whitish aspect of this surface on normal leaves is the basis for the epithet “bicolor;” however, shaded leaves or those on juvenile plants may be green and sparsely pubescent beneath. The leaves are mostly somewhat obovate in outline – with the toothing usually more irregular than in leaves of in Q. prinoides, Q. montana, and Q. muehlenbergii. However, occasional trees have very evenly and symmetrically toothed leaves, though still with acorns on the striking long peduncles (1.2–) 3–7 cm long, typical of Q. bicolor. Especially on open-grown trees, the lower branches tend to hang downward and to persist when dead.
In Quercus bicolor, the underside of the leathery leaves has scattered long, ± erect 1-4 rayed hairs visible over the mat of very dense whitish stellate hairs tightly appressed to the leaf surface. In Q. macrocarpa, these long hairs appear to be absent or at least very sparse (or specimens with sparse hairs perhaps representing hybrids?) However, this distinction does not work with shade leaves, where none of the hairs are appressed in either species.
An apparent hybrid with Q. prinoides, Quercus ×wagneri Gaynor, has been described from Livingston and Washtenaw Cos.