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This genus is accepted, and its native range is Cosmopolitan.
Eichhornia crassipes (Pontederiaceae)

[FTEA]

Pontederiaceae, B. Verdcourt. Flora of Tropical East Africa. 1968

Morphology General Habit
Floating or creeping aquatic herbs, rooting at the nodes
Morphology Leaves
Leaves often of two sorts, the floating or erect ones broad, lanceolate, ovate or orbicular, the submerged ones linear; petioles long, sheathing at the base or sheath produced at apex to form a “stipule”
Morphology Reproductive morphology Flowers
Flowers solitary or in spikes or panicles arising from a convolute sheath-like spathe or bract, or fasciculate within the leaf-sheath
Morphology Reproductive morphology Flowers Perianth
Perianth funnel-shaped, slightly irregularly divided into 6 lobes, the inner broader than the outer
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 6, the 3 upper included, the 3 lower ± exserted, usually with longer filaments
Morphology Reproductive morphology Flowers Gynoecium Pistil
Ovary 3-locular; ovules numerous; style filiform; stigma entire or very shortly 3–6-lobed
Morphology Reproductive morphology Fruits
Capsule membranous, 3-locular, enclosed in the faded perianth, ovoid to linear-fusiform
Morphology Reproductive morphology Seeds
Seeds numerous, oblong or ellipsoidal, finely ribbed.

[FTEA]

Pontederiaceae, B. Verdcourt. Flora of Tropical East Africa. 1968

Morphology General Habit
Erect glabrous usually perennial aquatic herbs, sometimes with stems arising from a stout creeping rhizome
Morphology Leaves
Leaves all radical with long petioles; flowering stems radical, each bearing one apical sheathing leaf, its petiole appearing as a prolongation of the stem
Morphology Reproductive morphology Flowers
Flowers medium-sized, blue, pedicellate, arranged in racemes (sometimes subumbelliform); the inflorescence is at first enclosed in a membranous spathe at the base of the peduncle, contained in the sheath of the apical leaf
Morphology Reproductive morphology Flowers Perianth
Perianth-lobes 6, free almost to the extreme base, the inner 3 broader, at first spreading, later twisted
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 6, fixed on the base of the perianth, equal or usually unequal, 5 with smaller yellow anthers, the sixth with a longer filament bearing an erect lateral tooth and having a longer blue anther
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary 3-locular; ovules numerous
Morphology Reproductive morphology Flowers Gynoecium Pistil
Style filiform; stigma subentire or very shortly 3–6-fid
Morphology Reproductive morphology Fruits
Capsule loculicidally splitting into 3 valves
Morphology Reproductive morphology Seeds
Seeds oblong, longitudinally ribbed.

Native to:

Afghanistan, Alabama, Andaman Is., Angola, Argentina Northeast, Argentina Northwest, Arkansas, Assam, Bangladesh, Belize, Benin, Bolivia, Borneo, Botswana, Brazil North, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, Burkina, Cambodia, Caprivi Strip, Central African Repu, Chad, Chile Central, China North-Central, China South-Central, China Southeast, Colombia, Congo, Connecticut, Costa Rica, Cuba, Delaware, District of Columbia, Dominican Republic, East Himalaya, Ecuador, Egypt, El Salvador, Florida, French Guiana, Gabon, Gambia, Georgia, Ghana, Guatemala, Guinea, Guinea-Bissau, Guyana, Hainan, Honduras, Illinois, India, Indiana, Inner Mongolia, Iowa, Ivory Coast, Jamaica, Japan, Jawa, Kansas, Kentucky, Kenya, Khabarovsk, Korea, Krym, Laos, Lesser Sunda Is., Liberia, Louisiana, Madagascar, Maine, Malawi, Malaya, Mali, Maluku, Manchuria, Maryland, Massachusetts, Mexico Central, Mexico Gulf, Mexico Southeast, Mexico Southwest, Michigan, Minnesota, Mississippi, Missouri, Mozambique, Myanmar, Namibia, Nansei-shoto, Nebraska, Nepal, New Brunswick, New Guinea, New Hampshire, New Jersey, New South Wales, New York, Nicaragua, Niger, Nigeria, North Carolina, North Caucasus, Northern Provinces, Northern Territory, Nova Scotia, Ohio, Oklahoma, Ontario, Pakistan, Panamá, Paraguay, Pennsylvania, Peru, Philippines, Primorye, Prince Edward I., Queensland, Québec, Rhode I., Rwanda, Senegal, Sierra Leone, South Carolina, South Dakota, Sri Lanka, Sudan, Sulawesi, Sumatera, Suriname, Tennessee, Texas, Thailand, Togo, Trinidad-Tobago, Uganda, Ukraine, Uruguay, Venezuela, Vermont, Vietnam, West Virginia, Western Australia, Wisconsin, Zambia, Zaïre, Zimbabwe

Introduced into:

Arizona, Aruba, Azores, Bahamas, Bermuda, Burundi, California, Cameroon, Cape Provinces, Caroline Is., Cayman Is., Colorado, Cook Is., Corse, Czechoslovakia, Equatorial Guinea, Fiji, France, Free State, Haiti, Hawaii, Italy, KwaZulu-Natal, Lebanon-Syria, Leeward Is., Maldives, Marianas, Marshall Is., Mauritius, Mexico Northeast, Mexico Northwest, Nauru, Netherlands Antilles, New Caledonia, New Zealand North, Norfolk Is., Palestine, Portugal, Puerto Rico, Rodrigues, Réunion, Samoa, Sardegna, Society Is., Solomon Is., South Australia, South China Sea, Spain, Swaziland, Taiwan, Tanzania, Turkey, Vanuatu, Victoria, Virginia, Windward Is.

Pontederia L. appears in other Kew resources:

First published in Sp. Pl.: 288 (1753)

Accepted by

  • (2018). https://phytokeys.pensoft.net/article/27652/ epublication.
  • Govaerts, R. (2004). World Checklist of Monocotyledons Database in ACCESS: 1-54382. The Board of Trustees of the Royal Botanic Gardens, Kew.

Flora of Tropical East Africa
Flora of Tropical East Africa
http://creativecommons.org/licenses/by-nc-sa/3.0

Interactive Key to Seed Plants of Malesia and Indo-China
The Malesian Key Group (2010) Interactive Key to Seed Plants of Malesia and Indo-China (Version 2.0, 28 Jul 2010) The Nationaal Herbarium Nederland Leiden and The Royal Botanic Gardens Kew

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. 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 2021. 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