Quercus phellos Linnaeus. Willow Oak, "Pin Oak". Phen: Mar-May; Sep-Nov (of the second year). Hab: Bottomland forests, especially on natural levees and second terraces, also in upland depression swamps developed on clay soils and in upland clay hardpan situations, weedy and successional on slopes and upland sites as a "weed tree" following disturbance, and widely planted as a street tree in towns and cities. Dist: Primarily a species of the Southeastern Coastal Plain: NY (Long Island), s. NJ, and se. PA south to s. GA and Panhandle FL, west to e. TX and se. OK, north in the interior to e. TN, s. KY, w. KY, s. IL, and se. MO, and e. OK.

Origin/Endemic status: Endemic

Synonymy: = Ar, C, F, Fl2, FNA3, G, GW2, Il, K1, K3, K4, NcTx, NE, NY, Pa, RAB, S, Tn, Tx, Va, W, WH3, Hunt (1990)

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