| NAME OF PLANT | WHERE FOUND | DATE | WHERE FOUND | DATE |
| Mahonia aquifolium | ||||
| Oregon grape | ||||
| Malus domestica | ||||
| apple | ||||
| Malus sylvestris | ||||
| crab apple | ||||
| Malva moschata | ||||
| musk mallow | ||||
| Malva neglecta | ||||
| dwarf mallow | ||||
| Malva sylvestris | ||||
| common mallow | ||||
| Matricaria discoidea | ||||
| pineapple weed | ||||
| Matricaria recutita | ||||
| scented mayweed | ||||
| Meconopsis cambrica | ||||
| Welsh poppy | ||||
| Medicago arabica | ||||
| spotted medick | ||||
| Medicago lupulina | ||||
| black medick | ||||
| Medicago sativa | ||||
| lucerne | ||||
| Melampyrum pratense | ||||
| common cow-wheat | ||||
| Melica nutans | ||||
| mountain melick | ||||
| Melica uniflora | ||||
| wood melick | ||||
| Melilotus albus | ||||
| white melilot | ||||
| Melilotus altissimus | ||||
| tall melilot | ||||
| Melilotus officinalis | ||||
| ribbed melilot | ||||
| Melissa officinalis | ||||
| balm | ||||
| Mentha aquatica | ||||
| water mint | ||||
| 55 | ||||