| china | | betula platyphylla | species | 12 | 0 |
| china | hebei | betula platyphylla | species | 0 | 1 |
| china | inner mongolia | betula platyphylla | species | 0 | 1 |
| china | liaoning | betula platyphylla | species | 0 | 1 |
| china | shanxi | betula platyphylla | species | 0 | 1 |
| japan | | betula platyphylla var. japonica | varietas | 4 | 0 |
| japan | fukushima prefecture | betula platyphylla var. japonica | varietas | 1 | 0 |
| japan | gifu prefecture | betula platyphylla var. japonica | varietas | 1 | 0 |
| japan | gunma prefecture | betula platyphylla var. japonica | varietas | 1 | 0 |
| japan | hokkaido prefecture | betula platyphylla | species | 2 | 3 |
| japan | hokkaido prefecture | betula platyphylla var. japonica | varietas | 5 | 0 |
| japan | iwate prefecture | betula platyphylla var. japonica | varietas | 1 | 0 |
| japan | nagano prefecture | betula platyphylla var. japonica | varietas | 6 | 0 |
| japan | toyama prefecture | betula platyphylla var. japonica | varietas | 1 | 0 |
| japan | yamanashi prefecture | betula platyphylla var. japonica | varietas | 2 | 0 |
| united states | maryland | betula platyphylla | species | 3 | 0 |