 Moraea-huttonii (Drakensberge, South Africa) |
 Moraea ochroleuca (Region Table Mountain, South Africa) |
 Morus nigra |
 Moussonia deppeana |
 Muraltia heisteria |
Muscari azureum => siehe  Pseudomuscari azureum |
 Muscari botryoides |
Muscari comosum siehe =>  Leopoldia comosa |
 Muscari neglectum |
 Mutisia acuminata (Peru, Chivay 3600m) |
 Mutisia arequipensis (Peru, Colca Canyon 3400m) |
 Myagrum perfoliatum |
Myosoton aquatica siehe =>  Stellaria aquatica |
Mycelis muralis siehe =>  Lactuca muralis |
 Myosotis arvensis |
 Myosotis scorpioides |
 Myosotis sylvatica |
 Myriophyllum spicatum |
 Myrmecodia echinata |
 Myrrhis odorata |
Narcissus assoanus subsp. praelongus siehe =>  Narcissus flavus |
| Narcissus flavus |
Narcissus minor siehe =>  Narcissus pseudonarcissus subsp. minor |
 Narcissus poeticus |
| Narcissus pseudonarcissus subsp. minor |
 Narcissus tazetta |
 Nasturtium officinale |
 Nematanthus-glabra |
 Nemesia rupicola |
 Nemesia versicolor (Region Table Mountain, South Africa) |
 Nemophila maculata |
 Neottia nidus-avis |
 Nepeta cataria |
 Nephrolepis cordifolia |
 Neslia paniculata |
 Nesocodon mauritianus |
 Nicotiana rustica |
 Nicotiana tabacum |
 Nicotiana tomentosa (Peru, Ollantaytambo, 3000m) |
 Nigella arvensis |
 Nigella damascena |
Noccaea montana siehe =>  Thlaspi montanum |
 Nuphar lutea |
 Nymphaea alba |
 Nymphoides ezannoi |
 Ochna serrulata |
 Ocimum basilicum |
 Ocimum obovatum (Swaziland) |
 Odontites vulgaris |
 Oemleria cerasiformis |
 Oenanthe silaifolia |
 Oenothera biennis |
 Oftia africana (Region Table Mountain, South Africa) |
 Olea europaea |
 Omphalodes cappadocica |
 Omphalodes linifolia |
 Omphalodes-verna |
 Oncidium ornithorhynchum |
 Onobrychis montana |
 Onobrychis viciifolia |
Ononis repens siehe =>  Ononis spinosa ssp. procurrens |
 Ononis spinosa |
| Ononis spinosa ssp procurrens |
 Onopordum acanthium |
 Onosma helvetica |
 Opuntia-ficus-indica |
 Oreochloa disticha |
 Origanum onites |
 Origanum vulgare |
 Orlaya grandiflora |
 Ornithogalum saundersiae |
 Ornithogalum umbellatum |
 Ornithopus perpusillus |
 Ornithopus pinnatus |
 Orobanche caryophyllacea |
 Osmanthus heterophyllus |
 Osmunda regalis |
 Ostrya carpinifolia |
 Ostrya japonica |
 Ostrya virginiana |
 Otholobium pubescens (Peru, Ollaytantambo 3400m) |
 Oxalis acetosella |
 Oxalis corniculata |
 Oxalis megalorrhiza |
 Oxalis purpurea |
 Oxalis stricta |
 Ozothamnus diosmifolius |
 Oxytropis jacquinii |
 Oxytropis pilosa |
Moehringia ciliata
Moehringia muscosa
Moehringia trinervia
Molinia caerulea
Moltkia petraea
Moneses uniflora
Monochaetum bonplandii
Monolena primuliflora
Monopsis decipiens (Swaziland)
Monotropa hypopitys
Moraea elliotii (Drakensberge, South Africa)