Myriophyllum aquaticum
Parrot's-feather
Myriophyllum spicatum
Spiked Water-milfoil
Myrrhis odorata
Sweet Cicely
Narcissus nobilis
Large-flowered Daffodil
Narcissus pseudonarcissus
Nardus stricta
Mat-grass
Narthecium ossifragum
Bog Asphodel
Neottia cordata
Lesser Twayblade
Neottia nidus-avis
Bird's-nest Orchid
Nicandra physalodes
Apple-of-Peru
Nonea lutea
Yellow Nonea
Nuphar lutea
Yellow Water-lily
Odontites vernus
Red Bartsia
Oenanthe crocata
Hemlock Water-dropwort
Oenanthe fistulosa
Tubular Water-dropwort
Oenanthe lachenalii
Parsley Water-dropwort
Oenanthe silaifolia
Narrow-leaved Water-dropwort
Oenothera biennis
Common Evening-primrose
Olearia macrodonta
New Zealand Holly
Ononis reclinata
Small Restharrow
Ononis repens
Common Restharrow
Ophioglossum azoricum
Small Adder's-tongue
Ophioglossum vulgatum
Adder's-tongue
Ophrys apifera
Bee Orchid