| Magnolia | Diaporthe americana |
| Mahonia | Cucurbitaria berberidis |
| Diaporthe detrusa | |
| Pseudotrichia viburnicola | |
| Malus | Biscogniauxia marginata |
| Diaporthe ambigua | |
| Diplodia seriata | |
| Glyphium elatum | |
| Hysteropatella prostii | |
| Leucostoma persoonii | |
| Malva | Puccinia malvacearum |
| Marchantia | Atradidymella sp. P07988 |
| Melica | Colletotrichum sp. P2579 |
| Melilotus | Diaporthe meliloti |
| Mentha | Puccinia menthae |
| Mercurialis | Cercospora mercurialis |
| Melampsora rostrupii | |
| Psilachnum lanceolatoparaphysatum | |
| Miscanthus | Anthostomella tumulosa |
| Molinia | Gloniella moliniae |
| Lophodermium culmigenum | |
| Morus | Diaporthe mori |
| Gibberella baccata | |
| Myrica | Cryptodiaporthe aubertii |
| Herpotrichia setosa | |
| Mycoglaena myricae | |
| Myrrhis | Puccinia chaerophylli |