Potamogeton L.

This genus is accepted, and its native range is Cosmopolitan.


M. Thulin et al. Flora of Somalia, Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Morphology General Habit
Slender to robust aquatic plants surviving cold or dry periods by rhizomes or specialized buds borne either on the rhizome or on the leafy stem
Morphology Leaves
Submerged leaf-blades usually thin and translucent, linear and grass-like to oblong, 1–many-nerved; floating leaf-blades usually more coriaceous and opaque; stipules either free from the leaf-bases or adnate to them in their lower part (stipular sheath) and free above (ligule), in either case the basal part may be open or tubular
Morphology Reproductive morphology Inflorescences
Spikes cylindrical to ovoid, dense or lax, sometimes interrupted, either raised a little above the water and wind-pollinated or submerged and water-pollinated
Morphology Reproductive morphology Flowers Tepal
Tepals rounded, with a stalk (clawed), green or brownish
Morphology Reproductive morphology Fruits
Fruit brown or greenish, often asymmetric.
About 160 species
Only few species in dry and saline regions.


Potamogetonaceae, J.J. Symoens. Flora of Tropical East Africa. 2006

Morphology General Habit
Rhizome present or absent, if present well differentiated from the stem, filiform, slender or robust, terete or ± compressed; stems terete or compressed, ± densely branched; turions present or absent
Morphology Leaves
Leaves alternate, but mostly subopposite toward the inflorescence apex (involucral leaves), sessile or petiolate, 1- to many-nerved, all submerged and with filiform, grass-like or ± expanded blade, or dimorphic, the submerged ones thin and ± translucent, sometimes reduced to phyllodes, the floating ones ± coriaceous, opaque, petiolate,and usually broader; stipulesalways present,although sometimes fugacious, forming a sheath, connate or convolute around the stem; blade or petiole sometimes attached near the top of the sheath which projects beyond the joint as a ventralligule, sometimes attached farther down the sheath or arising from the node
Morphology Reproductive morphology Inflorescences
Spikes cylindrical or subglobose, 3- to many-flowered, dense or lax, sometimes interrupted, mostly borne above the water and wind-pollinated, but sometimes submerged and water-pollinated
Morphology Reproductive morphology Flowers Tepal
Tepals rounded at the apex
Morphology Reproductive morphology Fruits
Fruitlets with soft mesocarp and multi-layered sclerified endocarp, with or without a distinct beak
Morphology Reproductive morphology Seeds
Embryo unciform or spiral; cotyledon curved in the seed.

Doubtfully present in:

Bismarck Archipelago

Native to:

Afghanistan, Alabama, Alaska, Albania, Alberta, Aleutian Is., Algeria, Altay, Amur, Andaman Is., Angola, Antipodean Is., Argentina Northeast, Argentina Northwest, Argentina South, Arizona, Arkansas, Assam, Austria, Azores, Bahamas, Baleares, Baltic States, Bangladesh, Belarus, Belgium, Belize, Bolivia, Borneo, Botswana, Brazil North, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, British Columbia, Bulgaria, Burkina, Burundi, Buryatiya, California, Cambodia, Cameroon, Canary Is., Cape Provinces, Cape Verde, Caprivi Strip, Central African Repu, Central European Rus, Chad, Chatham Is., Chile Central, Chile North, Chile South, China North-Central, China South-Central, China Southeast, Chita, Colombia, Colorado, Comoros, Congo, Connecticut, Corse, Costa Rica, Cuba, Cyprus, Czechoslovakia, Delaware, Denmark, District of Columbia, Dominican Republic, East Aegean Is., East European Russia, East Himalaya, Ecuador, Egypt, El Salvador, Equatorial Guinea, Eritrea, Ethiopia, Falkland Is., Finland, Florida, France, Free State, Føroyar, Gabon, Georgia, Germany, Ghana, Great Britain, Greece, Greenland, Guatemala, Guinea, Gulf of Guinea Is., Gulf States, Hainan, Haiti, Hawaii, Honduras, Hungary, Iceland, Idaho, Illinois, India, Indiana, Inner Mongolia, Iowa, Iran, Iraq, Ireland, Irkutsk, Italy, Ivory Coast, Jamaica, Japan, Jawa, Kamchatka, Kansas, Kazakhstan, Kentucky, Kenya, Khabarovsk, Kirgizstan, Korea, Krasnoyarsk, Kriti, Krym, Kuril Is., KwaZulu-Natal, Labrador, Laos, Lebanon-Syria, Leeward Is., Lesotho, Lesser Sunda Is., Liberia, Libya, Louisiana, Madagascar, Madeira, Magadan, Maine, Malawi, Malaya, Mali, Maluku, Manchuria, Manitoba, Marianas, Marion-Prince Edward, Maryland, Massachusetts, Mauritania, Mauritius, Mexican Pacific Is., Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Michigan, Minnesota, Mississippi, Missouri, Mongolia, Montana, Morocco, Mozambique, Myanmar, Namibia, Nansei-shoto, Nebraska, Nepal, Netherlands, Nevada, New Brunswick, New Caledonia, New Guinea, New Hampshire, New Jersey, New Mexico, New South Wales, New York, New Zealand North, New Zealand South, Newfoundland, Nicaragua, Niger, Nigeria, North Carolina, North Caucasus, North Dakota, North European Russi, Northern Provinces, Northern Territory, Northwest European R, Northwest Territorie, Norway, Nova Scotia, Nunavut, Ohio, Oklahoma, Oman, Ontario, Oregon, Pakistan, Palestine, Panamá, Paraguay, Pennsylvania, Peru, Philippines, Poland, Portugal, Primorye, Prince Edward I., Puerto Rico, Qinghai, Queensland, Québec, Rhode I., Romania, Rwanda, Réunion, Sakhalin, Sardegna, Saskatchewan, Saudi Arabia, Senegal, Seychelles, Sicilia, Sierra Leone, Sinai, Socotra, Solomon Is., Somalia, South Australia, South Carolina, South Dakota, South European Russi, Spain, Sri Lanka, Sudan, Sulawesi, Sumatera, Swaziland, Sweden, Switzerland, Tadzhikistan, Taiwan, Tanzania, Tasmania, Tennessee, Texas, Thailand, Tibet, Transcaucasus, Trinidad-Tobago, Tunisia, Turkey, Turkey-in-Europe, Turkmenistan, Tuva, Uganda, Ukraine, Uruguay, Utah, Uzbekistan, Vanuatu, Venezuela, Vermont, Victoria, Vietnam, Virginia, Washington, West Himalaya, West Siberia, West Virginia, Western Australia, Windward Is., Wisconsin, Wyoming, Xinjiang, Yakutskiya, Yemen, Yugoslavia, Yukon, Zambia, Zaïre, Zimbabwe

Introduced into:


Potamogeton L. appears in other Kew resources:

Date Reference Identified As Barcode Type Status Has image?
Dec 1, 2000 Cheek, M. [9884], Cameroon K000678180 No
May 1, 1997 Cheek, M. [8597], Cameroon K000678178 No

First published in Sp. Pl.: 126 (1753)

Accepted by

  • Govaerts, R.H.A. (2011). World checklist of selected plant families published update Facilitated by the Trustees of the Royal Botanic Gardens, Kew.
  • Kharkevich, S.S. (ed.) (1987). Plantae Vasculares Orientalis Extremi Sovietici 2: 1-448. Nauka, Leningrad.


Flora of West Tropical Africa

  • Dandy in J. Linn. Soc. 50: 507-540 (1937).
  • F.T.A. 8: 219
  • Sp. Pl. 126 (1753)

Flora of Somalia

  • Flora Somalia, Vol 4, (1995) Author: by K. A. Lye [updated by M. Thulin 2008]

Flora of Tropical East Africa

  • A. Bennett in F.T.A. 8: 219 (1901)
  • Cook, Aquat. Wetl. Pl. S. Afr.: 234– 239 (2004)
  • Dandy in J.L.S. 50: 507– 540 (1937)
  • Sp. Pl.: 126 (1753)
  • Wiegleb & Kaplan in Folia Geobot. 33: 241– 316 (1998)

  • Flora of Somalia

    Flora of Somalia

  • Flora of Tropical East Africa

    Flora of Tropical East Africa

  • Herbarium Catalogue Specimens

  • Kew Backbone Distributions

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

  • Neotropikey

    Milliken, W., Klitgard, B. and Baracat, A. (2009 onwards), Neotropikey - Interactive key and information resources for flowering plants of the Neotropics.

  • Plants and People Africa

    Common Names from Plants and People Africa http://www.plantsandpeopleafrica.com/
    © Plants and People Africa http://www.plantsandpeopleafrica.com http://creativecommons.org/licenses/by/3.0/