| ambrosia artemisiifolia | | Canada: Ontario, Regional Municipality of York, King Twp., Jokers Hill East., E of house in forest on trail to pond | | 314910816 |
| ambrosia artemisiifolia | | Canada: Ontario, rare Charitable Research Reserve, Blair Flats Wetland | | 929982152 |
| ambrosia artemisiifolia | | Canada: Ontario, rare Charitable Research Reserve, Blair Flats Wetland | | 930159736 |
| ambrosia artemisiifolia | | Canada: Ontario, Norfolk County, Norfolk Twp., Carr Tract and Nursery Tract (St. Williams Forest), North Walsingham/South Walsingham Townline Road | | 1316021938 |
| ambrosia artemisiifolia | | Canada: Ontario, Hamilton-Wentworth, City of Hamilton, Princess Point, along south shore trails | | 1316023612 |
| ambrosia artemisiifolia | | canada: ontario, norfolk county, norfolk twp., carr tract and nursery tract (st. williams forest), north walsingham/south walsingham townline road | | 1328822042 |
| ambrosia artemisiifolia | | canada: ontario, hamilton-wentworth, city of hamilton, princess point, along south shore trails | | 1331394273 |
| ambrosia artemisiifolia | | canada: ontario, hamilton-wentworth, city of hamilton, princess point, along south shore trails | | 1328822764 |
| ambrosia artemisiifolia | | canada: ontario, wellington county, guelph, downey road, just north of 401 highway, in a ditch | | 1328822680 |
| ambrosia artemisiifolia | | canada: ontario, norfolk county, norfolk twp., carr tract, north walsingham/south walsingham townline road | | 1328822298 |
| ambrosia artemisiifolia | | Canada: Ontario, rare Charitable Research Reserve | | 727826251 |
| ambrosia artemisiifolia | | Canada: Ontario, Regional Municipality of York, King Twp., Jokers Hill East, E of house in forest on trail to pond | | 320338977 |
| ambrosia artemisiifolia | | Canada: Ontario, Regional Municipality of York, King Twp., Jokers Hill East, E of house in forest on trail to pond | | 320337867 |
| ambrosia artemisiifolia | | Canada: Ontario, Regional Municipality of York, King Twp., Jokers Hill East., E of house in forest on trail to pond | | 315140277 |