Rhododendron maximum Linnaeus. Phen: Jun-Aug; Sep-Oct. Hab: Moist slopes, wet flats, bogs, swamps, north-facing bluffs in the Piedmont. Dist: Largely Appalachian: ME, NY, and OH south to GA and AL, primarily in the mountains.
Origin/Endemic status: Native
Taxonomy Comments: Apparently most closely related to R. ponticum Linnaeus of Turkey and vicinity (Milne 2004).
Synonymy: = C, F, FNA8, G, K1, K3, K4, NE, NY, Pa, RAB, S, Tn, Va, W, WV, Chamberlain (1982), Horn (2019), Luteyn et al (1996)