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