Jack Oak

The Quercus Ellipsoidalis is commonly known as Hill's Oak, Jack Oak, as well as Northern Pin Oak

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Growing Regions

Northern pin oak has a limited range; it is largely confined to the middle and western parts of the Great Lakes region. It occurs from central Michigan east to noth-central Wisconsin, eastern Iowa, northern Illinois, and northern Indiana. Disjunct populations occur in northern Ohio, Arkansas, and extreme southeastern North Dakota [6,10,23].

     

General Information

The currently accepted scientific name for northern pin oak is Quercus ellipsoidalis E. J. Hill [21]. It is in the subgenus Erythrobalanus, or red (black) oak group [23]. There are no recognized subspecies, varieties, or forms. Northern pin oak hybridizes with the following species [21,29]: x Q. rubra (northern red oak) x Q. velutina (black oak): Q. xpalaeolithicola Trel.

Northern pin oak is a common component in central upland deciduous
forest.  It is pure or comprises a majority of the stocking in varying
mixtures with white oak (Quercus alba), black oak (Q. velutina), scarlet
oak (Q. coccinea), bur oak (Q. macrocarpa), or northern red oak (Q.
borealis) [10].

The following published classifications list northern pin oak as a
dominant or codominant species:

Classification of forest ecosystems in Michigan [26]
Field guide to forest habitat types in northern Wisconsin [19]

• More Jack Oak Information

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