Nasturtium officinale
Water-cress
Nerine flexuosa
Nymphaea alba
White Water-lily
Nymphaea lotus
Egyptian lotus
Ocimum americanum
American Basil
Ocinum americanum
American Basil
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
Olearia macrodonta
New Zealand Holly
Ophiopogon jaburan
Giant Lilyturf
Ornithogalum umbellatum
Star-of-Bethlehem
Ornithopus perpusillus
Bird's-foot
Oxalis acetosella
Wood-sorrel
Oxalis incarnata
Pale Pink-sorrel
Oxalis triangularis
False Shamrock
Parnassia palustris
Grass-of-Parnassus
Passiflora caerulea
Blue Passionflower
Passiflora foetida
Stinking Passionflower
Pedicularis sylvatica
Lousewort
Persicaria amphibia
Amphibious Bistort
Persicaria hydropiper
Water-pepper