Narcissus obvallaris
Tenby Daffodil
Narcissus pseudonarcissus
Daffodil
Narcissus radiiflorus
Daffodil
Narcissus spp.
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
Nepenthes truncata
Nepeta x faassenii
Garden Cat-mint
Nephrolepis biserrata
Giant Swordfern
Nephrolepis brownii
Asian Sword-fern
Nephrolepis cordifolia
Fishbone Fern
Nerine bowdenii
Cape Flower
Nerine flexuosa
Nerium oleander
Oleander
Neustanthus phaseoloides
Tropical Kudzu
Nicandra physalodes
Apple-of-Peru
Nigritella nigra
Black Vanilla Orchid
Noccaea caerulescens
Alpine Penny-cress
Nonea lutea
Yellow Nonea
Nothofagus alpina
Rauli
Nothoscordum borbonicum
Honeybells
Nowellia curvifolia
Rustwort
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
Ochna serrulata
Small-leaved Plane
Ocimum americanum
American Basil
Ocinum 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 lachenalii
Parsley Water-dropwort
Oenanthe pimpinelloides
Corky-fruited Water-dropwort
Oenanthe silaifolia
Narrow-leaved Water-dropwort
Oenothera biennis
Small-flowered Evening-primrose
Oenothera glazioviana
Large-flowered Evening-primrose
Oenothera stricta
Fragrant Evening-primrose
Olearia macrodonta
New Zealand Holly
Onobrychis viciifolia
Sainfoin
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
Ophiopogon jaburan
Giant Lilyturf
Ophrys apifera
Bee Orchid
Ophrys fuciflora
Late Spider-orchid
Ophrys insectifera
Fly Orchid
Ophrys insectifera x apifera
Ophrys sphegodes
Early Spider-orchid
Oplismenus compositus
Running Mountaingrass
Opuntia cochenillifera
Cochineal Cactus
Opuntia ficus-indica
Prickly Pear
Opuntia microdasys
Angel's-wings
Orchis mascula
Early-purple Orchid
Orchis militaris
Military Orchid