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
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