 Moraea huttonii (Drakensberge, South Africa) |
 Moraea ochroleuca (Region Table Mountain, South Africa) |
 Morina longifolia |
 Morus nigra |
 Moussonia deppeana |
 Mukdenia rossii |
 Muraltia heisteria |
 Musa x paradisiaca |
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 |
 |
 Myricaria germanica |
 Myriophyllum spicatum |
 Myrmecodia echinata |
 Myrrhidendron donnellsmithii |
 Myrrhis odorata |
 Myrtus communis |
Mirabilis longiflora
Misopates orontium
Moehringia ciliata
Moehringia muscosa
Moehringia trinervia
Molineria capitulata
Molinia caerulea
Moltkia petraea
Moneses uniflora
Monochaetum bonplandii
Monolena primuliflora
Monopsis decipiens (Swaziland)
Monotropa hypopitys
Moraea elliotii (Drakensberge, South Africa)
Napaea dioica
Narcissus flavus
Narcissus cyclamineus
Narcissus pseudonarcissus subsp. minor
Narcissus poeticus
Narcissus tazetta
Nasa triphylla
Nasturtium officinale
Nematanthus gregarius
Nemesia rupicola
Nemesia versicolor (Region Table Mountain, South Africa)
Nemophila maculata
Neomarica caerulea
Neottia nidus-avis
Nepeta cataria
Nephelium lappaceum
Nephrolepis cordifolia
Neslia paniculata
Nesocodon mauritianus
Nicandra physalodes
Nicotiana longiflora
Nicotiana rustica
Nicotiana tabacum
Nicotiana tomentosa (Peru, Ollantaytambo, 3000m)
Nigella arvensis
Nigella damascena
Nigella sativa
Thlaspi montanum
Noccaea rotundifolia
Nuphar lutea
Nymphaea alba
Nymphaea nouchali
Nymphoides ezannoi
Ochna serrulata
Ocimum basilicum
Ocimum obovatum (Swaziland)
Odontites vulgaris
Oemleria cerasiformis
Oenanthe silaifolia
Oenothera biennis
Oenothera macrocarpa
Oftia africana (Region Table Mountain, South Africa)
Olea europaea
Omphalodes cappadocica
Omphalodes linifolia
Omphalodes verna
Onobrychis montana
Onobrychis viciifolia
Ononis spinosa ssp. procurrens
Ononis spinosa
Onopordum acanthium
Onosma arenaria
Onosma echioides
Onosma helvetica
Ophioglossum vulgatum
Opuntia-ficus-indica
Oreochloa disticha
Oreopteris limbosperma
Origanum onites
Origanum vulgare
Orlaya grandiflora
Ornithogalum candicans
Ornithogalum divergens
Ornithogalum saundersiae
Ornithogalum umbellatum
Ornithopus perpusillus
Ornithopus pinnatus
Orobanche caryophyllacea
Orobanche purpurea
Osmanthus heterophyllus
Osmunda regalis
Ostrya carpinifolia
Ostrya japonica
Ostrya virginiana
Otholobium pubescens (Peru, Ollaytantambo 3400m)
Oxalis acetosella
Oxalis corniculata
Oxalis megalorrhiza
Oxalis ortgiesii
Oxalis pes-caprae
Oxalis purpurea
Oxalis stricta
Oxyria digyna
Oxytropis jacquinii
Oxytropis pilosa
Ozothamnus diosmifolius