Ulmus thomasii Sargent. Cork Elm, Rock Elm. Phen: Mar-May. Hab: Mesic upland and riparian forests, shaded bluffs, especially over limestone. Dist: QC to MN and NE, south to NJ, MD, PA, WV, KY, TN, AR, and KS.
Origin/Endemic status: Native
Syn: = Ar, C, FNA3, Il, K1, K3, K4, Mi, Mo3, NE, NY, Tn; = Ulmus thomasi – F, G, GrPl, WV, orthographic variant