| canada | nova scotia | symphyotrichum tradescantii | species | 2 | 0 |
| canada | ontario | symphyotrichum tradescantii | species | 2 | 0 |
| canada | quebec | symphyotrichum tradescantii | species | 6 | 0 |
| united states | maine | symphyotrichum tradescantii | species | 1 | 0 |
| united states | massachusetts | symphyotrichum tradescantii | species | 2 | 0 |
| united states | new york | symphyotrichum tradescantii | species | 1 | 0 |