| canada | | melampsora medusae f. sp. tremuloides | no rank | 2 | 0 |
| canada | british columbia | melampsora medusae f. sp. tremuloides | no rank | 4 | 0 |
| canada | new brunswick | melampsora medusae f. sp. tremuloides | no rank | 8 | 0 |
| canada | prince edward island | melampsora medusae f. sp. tremuloides | no rank | 3 | 0 |
| canada | quebec | melampsora medusae f. sp. tremuloides | no rank | 99 | 0 |
| united states | wisconsin | melampsora medusae f. sp. tremuloides | no rank | 6 | 0 |