| japan | | hydrangea serrata | species | 5 | 0 |
| japan | akita prefecture | hydrangea serrata | species | 2 | 0 |
| japan | akita prefecture | hydrangea serrata var. yesoensis | varietas | 2 | 0 |
| japan | aomori prefecture | hydrangea serrata | species | 1 | 0 |
| japan | aomori prefecture | hydrangea serrata var. yesoensis | varietas | 1 | 0 |
| japan | chiba prefecture | hydrangea serrata | species | 2 | 0 |
| japan | ehime prefecture | hydrangea serrata | species | 2 | 0 |
| japan | fukui prefecture | hydrangea serrata | species | 2 | 0 |
| japan | fukuoka prefecture | hydrangea serrata f. acuminata | forma | 24 | 0 |
| japan | fukushima prefecture | hydrangea serrata | species | 1 | 0 |
| japan | fukushima prefecture | hydrangea serrata var. yesoensis | varietas | 3 | 0 |
| japan | gifu prefecture | hydrangea serrata | species | 2 | 0 |
| japan | gifu prefecture | hydrangea serrata var. yesoensis | varietas | 2 | 0 |
| japan | hokkaido prefecture | hydrangea serrata var. yesoensis | varietas | 7 | 0 |
| japan | hyogo prefecture | hydrangea serrata | species | 2 | 0 |
| japan | iwate prefecture | hydrangea serrata | species | 2 | 0 |
| japan | iwate prefecture | hydrangea serrata var. yesoensis | varietas | 4 | 0 |
| japan | kochi prefecture | hydrangea serrata | species | 2 | 0 |
| japan | kochi prefecture | hydrangea serrata f. acuminata | forma | 8 | 0 |
| japan | kumamoto prefecture | hydrangea serrata | species | 2 | 0 |
| japan | mie prefecture | hydrangea serrata | species | 8 | 0 |
| japan | miyagi ken prefecture | hydrangea serrata | species | 1 | 0 |
| japan | miyagi ken prefecture | hydrangea serrata var. yesoensis | varietas | 1 | 0 |
| japan | miyazaki prefecture | hydrangea serrata | species | 2 | 0 |
| japan | miyazaki prefecture | hydrangea serrata f. acuminata | forma | 16 | 0 |
| japan | nagano prefecture | hydrangea serrata | species | 2 | 0 |
| japan | niigata prefecture | hydrangea serrata | species | 1 | 0 |
| japan | niigata prefecture | hydrangea serrata var. yesoensis | varietas | 5 | 0 |
| japan | oita prefecture | hydrangea serrata | species | 2 | 0 |
| japan | shiga prefecture | hydrangea serrata | species | 2 | 0 |
| japan | shimane prefecture | hydrangea serrata | species | 2 | 0 |
| japan | shizuoka prefecture | hydrangea serrata | species | 13 | 0 |
| japan | tokushima prefecture | hydrangea serrata | species | 2 | 0 |
| japan | toyama prefecture | hydrangea serrata var. yesoensis | varietas | 1 | 0 |
| japan | yamagata prefecture | hydrangea serrata | species | 1 | 0 |
| japan | yamagata prefecture | hydrangea serrata var. yesoensis | varietas | 2 | 0 |
| japan | yamaguchi prefecture | hydrangea serrata | species | 5 | 0 |
| south korea | | hydrangea serrata | species | 9 | 0 |
| united states | new york | hydrangea serrata | species | 4 | 0 |