| Magnoliaceae | Magnolia family |
| Malvaceae | Mallow family |
| Melanthiaceae | Bunchflower family |
| Melastomataceae | Melastoma family |
| Menispermaceae | Moonseed family |
| Mniaceae | |
| Molluginaceae | Carpet-weed family |
| Moraceae | Mulberry family |
| Myricaceae | Bayberry family |
| Myrsinaceae | Myrsine family |