| Code | Region | Status | Source |
| AE |
East Aegean Islands |
introduced |
Calculated
|
| AE(G) |
Greek East Aegean Islands |
introduced |
Reference
|
| Be |
Belgium with Luxembourg |
introduced: adventitious (casual) |
Reference
|
| Br |
Great Britain |
introduced: adventitious (casual) |
Reference
|
| Bu |
Bulgaria |
introduced: naturalized |
Reference
|
| Cg |
Montenegro |
introduced: adventitious (casual) |
Reference
|
| Ct |
Croatia |
introduced |
Reference
|
| Cy |
Cyprus |
introduced: adventitious (casual) |
Reference
|
| Es |
Estonia |
introduced: adventitious (casual) |
Reference
|
| Ga |
France |
introduced: naturalized |
Calculated
|
| Ga(F) |
France |
introduced: naturalized |
Reference
|
| Ge |
Germany |
introduced: adventitious (casual) |
Reference
|
| Gg |
Georgia |
introduced: naturalized |
Reference
|
| He |
Switzerland |
introduced: naturalized |
Reference
|
| Hs |
Spain |
introduced: adventitious (casual) |
Calculated
|
| Hs(S) |
Spain |
introduced: adventitious (casual) |
Reference
|
| Hu |
Hungary |
introduced: adventitious (casual) |
Reference
|
| It |
Italy |
introduced: naturalized |
Reference
|
| Ju |
Former Jugoslavia |
introduced: adventitious (casual) |
Calculated
|
| Ju |
Former Jugoslavia |
introduced: naturalized |
Reference
|
| Rf |
The Russian Federation |
introduced: adventitious (casual) |
Calculated
|
| Rf(C) |
Central European Russia |
introduced: adventitious (casual) |
Reference
|
| Rf(CS) |
North Caucasus |
introduced |
Reference
|
| Rf(E) |
Eastern European Russia |
introduced: adventitious (casual) |
Reference
|
| Rm |
Romania |
introduced: adventitious (casual) |
Reference
|
| Si(S) |
Sicily |
introduced: naturalized |
Reference
|
| Sl |
Slovenia |
introduced |
Reference
|
| Tcs |
Transcaucasia (Azerbaijan, Armenia, and Georgia) |
introduced: naturalized |
Calculated
|