Potamogeton is a genus of aquatic, mostly freshwater, plants of the family Potamogetonaceae. Most are known by the common name pondweed, although many unrelated plants may be called pondweed, such as Canadian pondweed. The genus name means "river neighbor", originating from the Greek potamos (river) and geiton (neighbor).
Potamogeton crispus, the crisp-leaved pondweed, curly pondweed, curly-leaf pondweed or curled pondweed, is a species of aquatic plant (hydrophyte) native to Eurasia but an introduced species and often a noxious weed in North America.
Nobuyuki Tanaka is an economic botanist at the Tokyo Metropolitan University, the Makino Botanical Garden in Kōchi Prefecture, Japan.
Potamogeton perfoliatus is a perennial aquatic plant in the family Potamogetonaceae occurring in both standing and flowing freshwater habitats. It is widely distributed globally, occurring in all continents except South America and Antarctica.
Potamogeton praelongus, commonly known as whitestem pondweed in North America and long-stalked pondweed in Britain, is a large, perennial aquatic plant in the family Potamogetonaceae. It is widely distributed in lakes and rivers in the northern hemisphere, but is sensitive to poor water quality.
Potamogeton polygonifolius or bog pondweed, is an aquatic plant. It is found in shallow, nutrient-poor, usually acid standing or running water, bogs, fens and occasionally ditches.
Potamogeton lucens, or shining pondweed, is an aquatic perennial plant native to Eurasia and North Africa. It grows in relatively deep, still or slow-flowing, calcareous freshwater habitats.
Potamogeton alpinus is a species of perennial aquatic plant known by the common names alpine pondweed and red pondweed. It is widespread in the northern hemisphere in both rivers and lakes with good water quality.
Potamogeton pusillus is a species of aquatic plant known by the common names small pondweed, lesser pondweed or least pondweed. It occurs in standing and slow-flowing freshwater habitats throughout the Northern Hemisphere.
Potamogeton compressus is a species of aquatic plant known by the common names grass-wrack pondweed, flatstem pondweed and eel-grass pondweed.
Potamogeton obtusifolius, known as blunt-leaved pondweed, is an aquatic plant in the genus Potamogeton. It grows mainly in mesotrophic to eutrophic lakes, ponds and ditches, rarely in brackish water. It occurs primarily in Central Europe, the British Isles, Fennoscandia and eastern North America.
Stuckenia vaginata, commonly called sheathed pondweed, big sheathed pondweed or large-sheathed pondweed is a water plant species that grows in fresh and brackish water in Europe, Northern Asia and North America. Sheathed pondweed is rare, but is not in the 2012 IUCN Red List.
Potamogeton maackianus is an aquatic plant species in the genus Potamogeton. It is found in slow moving fresh water.
Potamogeton octandrus is an aquatic plant species in the genus Potamogeton. It is found in slow-moving fresh water. The specific epithet means 'eight-stamened'.
Nechamandra is a monotypic genus of an aquatic plant family Hydrocharitaceae. The sole species is Nechamandra alternifolia. It is found in slow moving fresh water.
Caldesia parnassifolia, is an aquatic species in the Alismataceae. It is found in slow-moving fresh water.
Norio Tanaka is an aquatic botanist at Tsukuba Botanical Garden, National Science Museum, Tokyo, Japan.
Potamogeton cristatus, the little-leaf pondweed, is an aquatic plant species in the genus Potamogeton. It is found in slow moving fresh water.
Potamogeton berchtoldii, common name small pondweed is an aquatic plant.
Potamogeton friesii, known as flat-stalked pondweed, or Fries' pondweed, is an aquatic plant in the genus Potamogeton. It grows mainly in mesotrophic to eutrophic rivers, lakes, ponds and ditches, rarely in brackish water. It occurs in North America, Europe, western Asia and a few scattered locations elsewhere in Asia.
