| japan | | ixeridium dentatum subsp. dentatum | subspecies | 1 | 0 |
| japan | nagano prefecture | ixeridium dentatum subsp. dentatum | subspecies | 2 | 0 |
| japan | niigata prefecture | ixeridium dentatum subsp. nipponicum | subspecies | 7 | 0 |
| japan | tochigi prefecture | ixeridium dentatum subsp. dentatum | subspecies | 7 | 0 |
| japan | toyama prefecture | ixeridium dentatum subsp. kimuranum | subspecies | 1 | 0 |
| japan | wakayama prefecture | ixeridium dentatum subsp. kitayamense | subspecies | 4 | 0 |