Arborescens
Annabelle is the most popular cultivar of Hydrangea arborescens
The leaves of smooth hydrangea annabelle are large, opposite, serrated, ovate, and deciduous. The lower leaf surface is glabrous or with inconspicuous fine hairs, appearing green; trichomes of the lower surface are restricted to the midrib and major veins.
The stem bark has a weird tendency to peel off in several successive thin layers with different colors, hence the common name "sevenbark".