Alisma lanceolatum
Narrow-leaved Water-plantain
Alisma plantago-aquatica
Water-plantain
Alopecurus aequalis
Orange Foxtail
Althaea officinalis
Marsh-mallow
Baldellia ranunculoides
Lesser Water-plantain
Bidens cernua
Nodding Bur-marigold
Bidens tripartita
Trifid Bur-marigold
Butomus umbellatus
Flowering-rush
Callitriche brutia
Pedunculate Water-starwort
Callitriche stagnalis
Common Water-starwort
Carex vulpina
True Fox-sedge
Catabrosa aquatica
Whorl-grass
Ceratophyllum demersum
Rigid Hornwort
Crassula helmsii
New Zealand Pigmyweed
Cyperus fuscus
Brown Galingale
Damasonium alisma
Starfruit
Deschampsia setacea
Bog Hair-grass
Elatine hexandra
Six-stamened Waterwort
Eleocharis acicularis
Needle Spike-rush
Eleocharis multicaulis
Many-stalked Spike-rush
Eriocaulon aquaticum
Pipewort
Erythranthe guttata
Monkeyflower
Erythranthe lutea
Blood-drop-emlets
Erythranthe x robertsii
Hybrid Monkeyflower
Glyceria declinata
Small Sweet-grass
Gnaphalium uliginosum
Marsh Cudweed
Helosciadium inundatum
Lesser Marshwort
Hippuris vulgaris
Mare's-tail
Hottonia palustris
Water-violet
Hydrocharis morsus-ranae
Frogbit
Illecebrum verticillatum
Coral-necklace
Isoetes echinospora
Spring Quillwort
Isoetes lacustris
Quillwort
Juncus bufonius
Toad Rush
Juncus tenuis
Slender Rush
Lagarosiphon major
Curly Waterweed
Lemna gibba
Fat Duckweed
Lemna minor
Common Duckweed
Lemna minuta
Least Duckweed
Lemna trisulca
Ivy-leaved Duckweed
Limosella aquatica
Mudwort
Littorella uniflora
Shoreweed
Lobelia dortmanna
Water Lobelia
Ludwigia palustris
Hampshire-purslane
Luronium natans
Floating Water-plantain
Lysichiton americanus
American Skunk-cabbage
Lythrum portula
Water-purslane
Mentha pulegium
Pennyroyal
Myriophyllum alterniflorum
Alternate Water-milfoil
Myriophyllum aquaticum
Parrot's-feather
Myriophyllum spicatum
Spiked Water-milfoil
Nasturtium officinale
Water-cress
Nuphar lutea
Yellow Water-lily
Nymphaea alba
White Water-lily
Nymphoides peltata
Fringed Water-lily
Persicaria amphibia
Amphibious Bistort
Persicaria hydropiper
Water-pepper
Persicaria minor
Small Water-pepper
Persicaria mitis
Tasteless Water-pepper
Pilularia globulifera
Pillwort
Potamogeton coloratus
Fen Pondweed
Potamogeton crispus
Curled Pondweed
Potamogeton lucens
Shining Pondweed
Potamogeton natans
Broad-leaved Pondweed
Potamogeton polygonifolius
Bog Pondweed
Ranunculus aquatilis
Common Water-crowfoot
Ranunculus baudotii
Brackish Water-crowfoot
Ranunculus hederaceus
Ivy-leaved Crowfoot
Ranunculus peltatus
Pond Water-crowfoot
Ranunculus sardous
Hairy Buttercup