Melica nutans
Mountain Melick
Melica uniflora
Wood Melick
Melilotus officinalis
Ribbed Melilot
Mentha aquatica
Water Mint
Mentha arvensis
Corn Mint
Mentha pulegium
Pennyroyal
Mentha x piperita
Peppermint
Menyanthes trifoliata
Bogbean
Mercurialis annua
Annual Mercury
Mercurialis perennis
Dog's Mercury
Moehringia trinervia
Three-nerved Sandwort
Molinia caerulea
Purple Moor-grass
Montia fontana
Blinks
Myosotis discolor
Changing Forget-me-not
Myosotis laxa
Tufted Forget-me-not
Myosotis scorpioides
Water Forget-me-not
Myosotis secunda
Creeping Forget-me-not
Myosotis sylvatica
Wood Forget-me-not
Myriophyllum alterniflorum
Alternate Water-milfoil
Myriophyllum spicatum
Spiked Water-milfoil
Myrrhis odorata
Sweet Cicely
Narcissus hispanicus
Spanish Daffodil
Narcissus macrolobus
Pale-flowered Daffodil
Narcissus minor
Lesser Daffodil
Narcissus nobilis
Large-flowered Daffodil
Narcissus pseudonarcissus
Daffodil
Narcissus x cyclazetta
Head-to-head Daffodil
Nardus stricta
Mat-grass
Narthecium ossifragum
Bog Asphodel
Neottia nidus-avis
Bird's-nest Orchid
Neottia ovata
Common Twayblade
Neuroterus quercusbaccarum
Common Spangle Gall
Nicandra physalodes
Apple-of-Peru
Nonea lutea
Yellow Nonea
Nuphar lutea
Yellow Water-lily
Nymphaea x marliacea
Coloured Water-lily
Nymphoides peltata
Fringed Water-lily
Odontites vernus
Red Bartsia
Oenanthe crocata
Hemlock Water-dropwort
Oenanthe fistulosa
Tubular Water-dropwort
Omphalina ericetorum
Ononis repens
Common Restharrow
Ononis spinosa
Spiny Restharrow
Ophioglossum vulgatum
Adder's-tongue
Ophrys apifera
Bee Orchid
Orchis mascula
Early-purple Orchid
Oreopteris limbosperma
Lemon-scented Fern
Ornithopus perpusillus
Bird's-foot
Orobanche hederae
Ivy Broomrape
Orobanche rapum-genistae
Greater Broomrape
Orthilia secunda
Serrated Wintergreen
Osmunda regalis
Royal Fern
Oxalis acetosella
Wood-sorrel
Oxybasis rubra
Red Goosefoot
Papaver cambricum
Welsh Poppy
Pararge aegeria
Speckled Wood
Parietaria judaica
Pellitory-of-the-wall
Paris quadrifolia
Herb-paris
Pastinaca sativa
Wild Parsnip
Pedicularis palustris
Marsh Lousewort
Pedicularis sylvatica
Lousewort
Pellia spp.
Pentaglottis sempervirens
Green Alkanet
Persicaria amphibia
Amphibious Bistort
Persicaria hydropiper
Water-pepper
Persicaria lapathifolia
Pale Persicaria
Persicaria maculosa
Redshank
Persicaria minor
Small Water-pepper
Persicaria mitis
Tasteless Water-pepper
Petasites hybridus
Butterbur