| Code | Region | Status | Source | 
						
							
								| Ab | Azerbaijan | native | Calculated | 
						
							
								| Ab(A) | Azerbaijan | native | Reference | 
						
							
								| Ab(N) | Nakhichevan | native | Reference | 
						
							
								| Al | Albania | native | Reference | 
						
							
								| Ar | Armenia | native | Reference | 
						
							
								| Ar | Armenia | native | Calculated | 
						
							
								| Au | Austria with Liechtenstein | introduced | Reference | 
						
							
								| Au(A) | Austria | introduced | Reference | 
						
							
								| Be | Belgium with Luxembourg | introduced: naturalized | Reference | 
						
							
								| Be(B) | Belgium | introduced: naturalized | Reference | 
						
							
								| BH | Bosnia-Herzegovina | native | Reference | 
						
							
								| Br | Great Britain | introduced: naturalized | Reference | 
						
							
								| Bu | Bulgaria | native | Reference | 
						
							
								| By | Belarus | native: doubtfully native | Reference | 
						
							
								| Cg | Montenegro | native | Reference | 
						
							
								| Co | Corse | native: reported in error | Reference | 
						
							
								| Cs | Czech Republic | introduced: naturalized | Reference | 
						
							
								| Ct | Croatia | introduced | Reference | 
						
							
								| Ct | Croatia | native | Reference | 
						
							
								| Da | Denmark with Bornholm | introduced | Reference | 
						
							
								| Es | Estonia | introduced: naturalized | Reference | 
						
							
								| Fe | Finland with Ahvenanmaa | introduced | Reference | 
						
							
								| Ga | France | introduced: naturalized | Calculated | 
						
							
								| Ga(C) | Channel Is. | introduced: adventitious (casual) | Reference | 
						
							
								| Ga(F) | France | introduced: naturalized | Reference | 
						
							
								| Ge | Germany | introduced | Reference | 
						
							
								| Ge | Germany | introduced: naturalized | Reference | 
						
							
								| Gg | Georgia | native | Reference | 
						
							
								| Gr | Greece | native | Reference | 
						
							
								| Hb | Ireland | introduced | Reference | 
						
							
								| Hb | Ireland | introduced: naturalized | Calculated | 
						
							
								| Hb(E) | Ireland | introduced: naturalized | Reference | 
						
							
								| Hb(N) | Northern Ireland | introduced: naturalized | Reference | 
						
							
								| He | Switzerland | introduced | Reference | 
						
							
								| Ho | Netherlands | introduced: adventitious (casual) | Reference | 
						
							
								| Hs | Spain | introduced | Calculated | 
						
							
								| Hs | Spain | introduced: naturalized | Reference | 
						
							
								| Hs(S) | Spain | introduced | Reference | 
						
							
								| Hu | Hungary | introduced: naturalized | Reference | 
						
							
								| It | Italy | native | Reference | 
						
							
								| Ju | Former Jugoslavia | native | Reference | 
						
							
								| Ju | Former Jugoslavia | native | Calculated | 
						
							
								| La | Latvia | introduced: naturalized | Reference | 
						
							
								| Lt | Lithuania | introduced: naturalized | Reference | 
						
							
								| Mk | The former Jugoslav Republic of Makedonija | native | Reference | 
						
							
								| Mo | Moldova | native: doubtfully native | Reference | 
						
							
								| No | Norway | introduced | Reference | 
						
							
								| Po | Poland | introduced: naturalized | Reference | 
						
							
								| Rf | The Russian Federation | native | Calculated | 
						
							
								| Rf(C) | Central European Russia | native: doubtfully native | Reference | 
						
							
								| Rf(CS) | North Caucasus | native | Reference | 
						
							
								| Rf(E) | Eastern European Russia | native: doubtfully native | Reference | 
						
							
								| Rf(K) | Kaliningrad | native: doubtfully native | Reference | 
						
							
								| Rf(N) | Northern European Russia | native: doubtfully native | Reference | 
						
							
								| Rf(NW) | Northwest European Russia | native: doubtfully native | Reference | 
						
							
								| Rf(S) | South European Russia | native: doubtfully native | Reference | 
						
							
								| Rm | Romania | introduced: naturalized | Reference | 
						
							
								| Sa | Sardegna | native: presence questionable | Reference | 
						
							
								| Sk | Slovakia | introduced: naturalized | Reference | 
						
							
								| Sl | Slovenia | native: doubtfully native | Reference | 
						
							
								| Sr | Serbia including Kosovo and Vojvodina | native | Reference | 
						
							
								| Su | Sweden | introduced | Reference | 
						
							
								| Tcs | Transcaucasia (Azerbaijan, Armenia, and Georgia) | native | Calculated | 
						
							
								| Tcs | Transcaucasia (Azerbaijan, Armenia, and Georgia) | native | Calculated | 
						
							
								| Tu | Turkey | native | Calculated | 
						
							
								| Tu | Turkey | native | Calculated | 
						
							
								| Tu(A) | Asiatic Turkey | native | Calculated | 
						
							
								| Tu(A) | Asiatic Turkey | native | Reference | 
						
							
								| Uk | Ukraine | native | Reference | 
						
							
								| Uk | Ukraine | native | Calculated | 
						
							
								| Uk(K) | Crimea | native | Reference | 
						
							
								| Uk(K) | Crimea | native | Reference | 
						
							
								| Uk(U) | Ukraine | native | Reference | 
						
							
								| Uk(U) | Ukraine | native | Reference |