Hydrangea chinensis
Hydrangea chinensis is a species of flowering plant in the family Hydrangeaceae, native to Myanmar, southeast China, and Taiwan. It grows in valleys and on mountain tops and slopes.

Subtaxa
The following varieties are accepted:
Hydrangea chinensis var. chinensis
Hydrangea chinensis var. lobbii (Maxim.) Kitam. – Philippines, Taiwan
Hydrangea chinensis var. yayeyamensis (Koidz.) T.Yamaz. – Ryukyu Islands

References

chinensis
Flora of Myanmar
Flora of Southeast China
Flora of Taiwan