Photo: Hydrangea serrata 2.

var. thunbergii. Flower cluster, bright blue and white. Tokyo bot.g., Japan. Planted. 2008-06-10.
Hydrangea serrata (Thunb.) Ser. Sven.: purpurhortensia. Bot. syn.: Hydrangea acuminata Sieb. & Zucc.
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Photo: Hydrangea serrata 2.