| china | | populus tremula x populus alba | species | 1 | 0 |
| china | xinjiang | populus tremula x populus alba | species | 9 | 0 |
| france | | populus tremula x populus alba | species | 7 | 0 |
| france | lorraine region | populus tremula x populus alba | species | 6 | 0 |
| germany | bavaria | populus tremula x populus alba | species | 1 | 0 |
| south africa | gauteng province | populus tremula x populus alba | species | 2 | 0 |
| spain | | populus tremula x populus alba | species | 4 | 0 |