M |
| Maclura aurantiaca |
| Maclura pomifera |
| Maianthemum bifolium |
| Malus sylvestris |
| Malva alcea |
| Malva neglecta |
| Malva sylvestris |
| Marrubium candidissimum |
| Marrubium incanum |
| Marrubium vulgare |
| Matricaria chamomilla |
| Matricaria discoidea |
| Matricaria inodora |
| Matricaria parthenium |
| Medicago arabica |
| Medicago falcata |
| Medicago lupulina |
| Medicago minima |
| Medicago orbicularis |
| Medicago prostrata |
| Medicago sativa |
| Medicago sativa subsp. falcata |
| Medicago tribuloides |
| Medicago truncatula |
| Medicago x varia |
| Melampyrum barbatum subsp. carstiense |
| Melampyrum cristatum |
| Melampyrum timbriatum |
| Melampyrum pratense |
| Melampyrum velebiticum |
| Melandrium album |
| Melica ciliata |
| Melica nutans |
| Melica uniflora |
| Melilotus albus |
| Melilotus altissimus |
| Melilotus indicus |
| Melilotus officinalis |
| Melilotus parviflora |
| Melilotus tommasinii |
| Melissa bicornis |
| Melissa officinalis |
| Melissa officinalis var. villosa |
| Melissa romana |
| Melittis melissophyllum |
| Mentha aquatica |
| Mentha arvensis |
| Mentha longifolia |
| Mentha pulegium |
| Mentha spicata |
| Mentha sylvestris |
| Mercurialis annua |
| Mercurialis ovata |
| Mercurialis perennis |
| Mespilus germanica |
| Micromeria juliana |
| Micromeria thymifolia |
| Micropus erectus |
| Minuartia verna |
| Misopates orontium |
| Mnium hornum |
| Moehringia muscosa |
| Moehringia tommasinii |
| Moehringia trinenia |
| Molinia caerulea subsp. arundinacea |
| Monotropa hypopitys |
| Morus alba |
| Morus nigra |
| Muscari botryoides |
| Muscari comosum |
| Muscari neglectum |
| Muscari racemosum |
| Mycelis muralis |
| Myosotis arvensis |
| Myosotis caespitosa |
| Myosotis laxa subsp. caespitosa |
| Myosotis ramosissima |
| Myosotis suaveolens |
| Myosoton aquaticum |
| Myriophyllum spicatum |
| Myrrhoides nodosa |
| Myrtus communis |