| Code | Region | Status | Source |
| Al |
Albania |
native |
Reference
|
| Au |
Austria with Liechtenstein |
native: doubtfully native |
Reference
|
| Be |
Belgium with Luxembourg |
native: doubtfully native |
Reference
|
| Bl |
Baleares |
native |
Reference
|
| Br |
Great Britain |
native: doubtfully native |
Reference
|
| Bu |
Bulgaria |
native: doubtfully native |
Reference
|
| Co |
Corse |
native |
Reference
|
| Cr |
Kriti with Karpathos, Kasos & Gavdhos |
native |
Reference
|
| Da |
Denmark with Bornholm |
native: doubtfully native |
Reference
|
| Fe |
Finland with Ahvenanmaa |
introduced |
Reference
|
| Ga |
France |
native |
Calculated
|
| Ga(F) |
France |
native |
Reference
|
| Ge |
Germany |
native: doubtfully native |
Reference
|
| Gr |
Greece |
native |
Reference
|
| Hb |
Ireland |
native: doubtfully native |
Reference
|
| He |
Switzerland |
native: doubtfully native |
Reference
|
| Ho |
Netherlands |
native: doubtfully native |
Reference
|
| Hs |
Spain |
native |
Reference
|
| Hu |
Hungary |
native |
Reference
|
| It |
Italy |
native |
Reference
|
| Ju |
Former Jugoslavia |
native |
Reference
|
| Lu |
Portugal |
native: doubtfully native |
Reference
|
| No |
Norway |
native: doubtfully native |
Reference
|
| Po |
Poland |
native: doubtfully native |
Reference
|
| Rm |
Romania |
native: doubtfully native |
Reference
|
| Sa |
Sardegna |
native |
Reference
|
| Si |
Sicily with Malta |
native |
Reference
|
| Su |
Sweden |
native: doubtfully native |
Reference
|
| Tu |
Turkey |
native |
Calculated
|
| Tu(E) |
Turkey-in-Europe |
native |
Reference
|
| Uk |
Ukraine |
native: doubtfully native |
Calculated
|
| Uk(K) |
Crimea |
native: doubtfully native |
Reference
|