Hydrangea cinerea Small. Phen: May-Jul (-Aug). Hab: Rocky forests and rock outcrops, roadbanks, perhaps strictly or mostly associated with mafic or calcareous rocks. Dist: Sw. NC, c. IN, c. IL, and c. MO south to n. SC, sc. AL, and c. AR.
Origin/Endemic status: Native
Synonymy: = FNA12, Il, K1, K3, NE, S, Tn, W, Pilatowski (1982); = Hydrangea arborescens L. ssp. discolor (Ser.) E.M.McClint. – RAB, McClintock (1957); = Hydrangea arborescens L. var. deamii E.St.John – F; = Hydrangea arborescens L. var. discolor Ser. – C, G; < Hydrangea arborescens L. – GrPl