Rhododendron arborescens (Pursh) Torrey. Sweet Azalea, Smooth Azalea. Phen: Late May-Jul; Jul-Oct. Hab: Rocky riversides, wooded stream banks, swamps, high elevation forests, shrub balds. Dist: Primarily Appalachian: ne. PA and se. KY south to sc. NC, w. SC, c. GA, and c. AL.

Origin/Endemic status: Endemic

Synonymy: = C, F, FNA8, G, K1, K3, K4, Pa, RAB, Tn, Va, W, WV, Horn (2019), Kron (1993), Luteyn et al (1996); = Azalea arborescens Pursh – S; > Rhododendron arborescens (Pursh) Torr. var. arborescens – Wilson & Rehder (1921); > Rhododendron arborescens (Pursh) Torr. var. richardsonii Rehder – Wilson & Rehder (1921)

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