types:
hornwort
any aquatic plant of the genus Ceratophyllum; forms submerged masses in ponds and slow-flowing streams
water lily
an aquatic plant of the family Nymphaeaceae
cryptocoryne,
water trumpet
any plant of the genus Cryptocoryne; evergreen perennials growing in fresh or brackish water; tropical Asia
Orontium aquaticum,
golden club
aquatic plant of the southeastern United States having blue-green leaves and a spadix resembling a club covered with tiny yellow flowers
arrow arum
an aquatic plant of the genus Peltandra; North America
duckweed
any small or minute aquatic plant of the family Lemnaceae that float on or near the surface of shallow ponds
Subularia aquatica,
awlwort
small aquatic plant having tufted awl-shaped leaves in a basal rosette and minute white flowers; circumboreal
water milfoil
an aquatic plant of the genus Myriophyllum having feathery underwater leaves and small inconspicuous flowers
Eriocaulon aquaticum,
pipewort
aquatic perennial of North America and Ireland and Hebrides having translucent green leaves in a basal spiral and dense buttonlike racemes of minute white flowers
naiad,
water nymph
submerged aquatic plant having narrow leaves and small flowers; of fresh or brackish water
Hydrilla verticillata,
hydrilla
submersed plant with whorled lanceolate leaves and solitary axillary flowers; Old World plant naturalized in southern United States and clogging Florida's waterways
waterweed
a weedy aquatic plant of genus Elodea
pondweed
any of several submerged or floating freshwater perennial aquatic weeds belonging to the family Potamogetonaceae
water starwort
any of several aquatic plants having a star-shaped rosette of floating leaves; America, Europe and Asia
bog plant,
marsh plant,
swamp plant
a semiaquatic plant that grows in soft wet land; most are monocots: sedge, sphagnum, grasses, cattails, etc; possibly heath
rush
grasslike plants growing in wet places and having cylindrical often hollow stems
watermeal
any of various aquatic plants of the genus Wolffia; throughout warmer regions of the world
iva,
marsh elder
any of various coarse shrubby plants of the genus Iva with small greenish flowers; common in moist areas (as coastal salt marshes) of eastern and central North America
sedge
grasslike or rushlike plant growing in wet places having solid stems, narrow grasslike leaves and spikelets of inconspicuous flowers
cattail
tall erect herbs with sword-shaped leaves; cosmopolitan in fresh and salt marshes
sabbatia
any of various plants of the genus Sabbatia having usually pink cymose flowers; occur from acid bogs to brackish marshes
yellow-eyed grass
any of several rushlike plants, especially of the pine barrens of southern United States
frog's lettuce
very similar to Potamogeton; of western Africa, Asia, and Europe
grass-of-Parnassus,
parnassia
any of various usually evergreen bog plants of the genus Parnassia having broad smooth basal leaves and a single pale flower resembling a buttercup
Sium suave,
water parsnip
stout white-flowered perennial found wild in shallow fresh water; northern United States and Asia