[n = 23]
| Year / Period | From | To | Established | Ecol. effects |
|---|---|---|---|---|
| unknown | Unknown | Spain | probably not established | |
| unknown | Unknown | Italy | established | |
| unknown | Unknown | Austria | probably established | |
| 1901 - 1902 | USA | New Zealand | probably established | probably none |
| 1963 - 1978 | USA | France | probably not established | |
| 1886 - 1893 | Ontario | Newfoundland | not established | none |
| 1886 | North America | France | not established | unknown |
| 1888 | USA | Switzerland | established | probably some |
| 1888 | Switzerland | Germany | established | |
| 1888 | USA | Germany | established | |
| 1904 | USA | Argentina | established | |
| 1904 | USA | Japan | established | unknown |
| 1928 | USA | UK | not established | unknown |
| 1936 | USA | Bolivia | not established | |
| 1940 | USA | Peru | probably not established | |
| 1953 | Canada | Morocco | probably not established | |
| 1955 | USA | Finland | probably not established | probably none |
| 1959 | North America | Sweden | established | |
| 1961 | France | Kerguelen Is. | established | probably some |
| 1961 | Sweden | Denmark | not established | |
| 1961 | USA | Denmark | not established | |
| 1971 | Unknown | Norway | established | none |
| 1972 | Norway | Czech Republic | not established | no data |