*Quercus ellipsoidalis E.J. Hill. Northern Pin Oak, Hill's Oak. Phen: Apr-May; Sep-Oct (of the second year). Hab: Dry to mesic sandy, acidic, upland forests or slopes. Dist: ON west to e. ND, south to n. OH, n. IN, n. IL, and n. MO; disjunct in Carter County, MO). Barely reaching our region in Carter County, MO (J. Thomas 2631), this species is distributed primarily in the upper midwestern US.

Origin/Endemic status: Native

Other Comments: This species is distributed primarily in the upper midwestern US. Confirmed from one county in our area (Carter County, MO; J. Thomas 2631), which apparently is an escape from trees planted at a nearby Forest Service office (J. Thomas, pers. comm., 2022).

Synonymy: = C, F, FNA3, G, GrPl, K3, K4, Mi

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