Musa acuminata
Cavendish Banana
Mycelis muralis
Wall Lettuce
Myosotis alpestris
Alpine Forget-me-not
Myosotis arvensis
Field Forget-me-not
Myosotis discolor
Changing Forget-me-not
Myosotis laxa
Tufted Forget-me-not
Myosotis ramosissima
Early Forget-me-not
Myosotis scorpioides
Water Forget-me-not
Myosotis secunda
Creeping Forget-me-not
Myosotis stricta
Myosotis sylvatica
Wood Forget-me-not
Myosurus minimus
Mousetail
Myrica gale
Bog-myrtle
Myriophyllum alterniflorum
Alternate Water-milfoil
Myriophyllum aquaticum
Parrot's-feather
Myriophyllum spicatum
Spiked Water-milfoil
Myrrhis odorata
Sweet Cicely
Narcissus macrolobus
Pale-flowered Daffodil
Narcissus obvallaris
Tenby Daffodil
Narcissus pseudonarcissus
Daffodil
Narcissus x cyclazetta
Head-to-head Daffodil
Nardus stricta
Mat-grass
Narthecium ossifragum
Bog Asphodel
Nasturtium officinale
Water-cress
Neoregelia carolinae
Blushing Bromeliad
Neottia cordata
Lesser Twayblade
Neottia nidus-avis
Bird's-nest Orchid
Neottia ovata
Common Twayblade
Nepenthes spp.
Pitcherplant
Nepeta x faassenii
Garden Cat-mint
Nephrolepis cordifolia
Fishbone Fern
Nicandra physalodes
Apple-of-Peru
Noccaea caerulescens
Alpine Penny-cress
Nonea lutea
Yellow Nonea
Nothofagus alpina
Rauli
Nuphar lutea
Yellow Water-lily
Nymphaea alba
White Water-lily
Nymphaea capensis
Cape Blue Waterlily
Nymphaea lotus
Egyptian Lotus
Nymphaea x marliacea
Coloured Water-lily
Nymphoides peltata
Fringed Water-lily
Nypta fruticans
Nipa Palm
Ochrolechia parella
Crab-eye Lichen
Ocimum americanum
American Basil
Odontites vernus
Red Bartsia
Odontosoria chinensis
Lace Fern
Oenanthe aquatica
Fine-leaved Water-dropwort
Oenanthe crocata
Hemlock Water-dropwort
Oenanthe fistulosa
Tubular Water-dropwort
Oenanthe silaifolia
Narrow-leaved Water-dropwort
Oenothera biennis
Small-flowered Evening-primrose
Oenothera stricta
Fragrant Evening-primrose
Olearia macrodonta
New Zealand Holly
Ononis arvensis
Ononis reclinata
Small Restharrow
Ononis repens
Common Restharrow
Ononis spinosa
Spiny Restharrow
Ophioglossum azoricum
Small Adder's-tongue
Ophioglossum vulgatum
Adder's-tongue
Ophrys apifera
Bee Orchid
Ophrys insectifera
Fly Orchid
Ophrys sphegodes
Early Spider-orchid
Oplismenus compositus
Running Mountaingrass
Opuntia cochenillifera
Cochineal Cactus
Opuntia ficus-indica
Prickly Pear
Opuntia microdasys
Angel's-wings
Orchid 'Butterfly Wings'
Orchis mascula
Early-purple Orchid
Orchis militaris
Military Orchid
Orchis purpurea
Lady Orchid