Vallisneria P.Micheli ex L.

This genus is accepted, and its native range is Old World, N. & Central America, Caribbean.

[FTEA]

Hydrocharitaceae, David Simpson. Flora of Tropical East Africa. 1989

Morphology General Habit
Dioecious, submerged, freshwater, perennial herbs
Morphology Roots
Roots simple
Morphology Stem
Stems elongate, shortly stoloniferous or very shortly erect
Morphology Leaves
Leaves sessile, spirally arranged, radical, linear, obtuse, sheathing at the base, patent or erect, opaque or somewhat translucent, with 3–5 longitudinal veins; margins green, entire to coarsely serrate Nodal scales not seen
Morphology Leaves Stipules
Stipules 0
Morphology Reproductive morphology Flowers
Flowers unisexual Female flowers: sepals 3, ovate to oblong-ovate, obtuse, erect; petals 3, minute, linear, rudimentary; staminodes 3, linear, rudimentary or absent; ovary elongate, narrowly cylindric, 1-locular, placentation parietal; ovules numerous, orthotropous; perianth-tube absent; styles 3, reduced; stigmas 3, linear, deeply 2-lobed, papillose on adaxial surface Male flowers shortly pedicellate, breaking free and floating before anthesis; sepals 3, oblong to ovate, cucullate, reflexed at anthesis; petal 1, minute, linear, rudimentary, erect or reflexed; stamens 1–3, erect, or divergent, the filaments sometimes united; staminode 1, linear, rudimentary
Morphology Reproductive morphology Inflorescences
Male spathe solitary in leaf-axil, shortly pedunculate, ovoid, shortly 2-lobed at the apex, translucent, with numerous flowers Female spathe solitary in leaf-axil, long-pedunculate (the peduncle spirally contracting after fertilisation), cylindric, 2-lobed at apex, translucent, 1-flowered
sex Male
Male spathe solitary in leaf-axil, shortly pedunculate, ovoid, shortly 2-lobed at the apex, translucent, with numerous flowers Male flowers shortly pedicellate, breaking free and floating before anthesis; sepals 3, oblong to ovate, cucullate, reflexed at anthesis; petal 1, minute, linear, rudimentary, erect or reflexed; stamens 1–3, erect, or divergent, the filaments sometimes united; staminode 1, linear, rudimentary
sex Female
Female flowers: sepals 3, ovate to oblong-ovate, obtuse, erect; petals 3, minute, linear, rudimentary; staminodes 3, linear, rudimentary or absent; ovary elongate, narrowly cylindric, 1-locular, placentation parietal; ovules numerous, orthotropous; perianth-tube absent; styles 3, reduced; stigmas 3, linear, deeply 2-lobed, papillose on adaxial surface Female spathe solitary in leaf-axil, long-pedunculate (the peduncle spirally contracting after fertilisation), cylindric, 2-lobed at apex, translucent, 1-flowered
Morphology Reproductive morphology Fruits
Fruit elongate, narrowly cylindric, opening by decay of the pericarp
Morphology Reproductive morphology Seeds
Seeds narrowly ellipsoid to oblong, striate.

Doubtfully present in:

Cameroon

Native to:

Afghanistan, Alabama, Algeria, Assam, Bangladesh, Botswana, Bulgaria, Burundi, Cambodia, Caprivi Strip, Central African Repu, Chad, China North-Central, China South-Central, China Southeast, Colombia, Congo, Connecticut, Cuba, Delaware, District of Columbia, Dominican Republic, Egypt, Equatorial Guinea, Ethiopia, Florida, France, Georgia, Ghana, Greece, Guatemala, Haiti, Honduras, Illinois, India, Indiana, Iowa, Iran, Iraq, Italy, Jamaica, Japan, Kazakhstan, Kentucky, Kenya, Kirgizstan, Korea, KwaZulu-Natal, Lebanon-Syria, Louisiana, Maine, Malawi, Mali, Manchuria, Manitoba, Maryland, Massachusetts, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Southeast, Michigan, Minnesota, Mississippi, Missouri, Mozambique, Myanmar, Namibia, Nepal, Nevada, New Brunswick, New Caledonia, New Guinea, New Hampshire, New Jersey, New Mexico, New South Wales, New York, Nigeria, North Carolina, North Caucasus, Northern Territory, Nova Scotia, Ohio, Ontario, Oregon, Pakistan, Palestine, Pennsylvania, Philippines, Portugal, Primorye, Queensland, Québec, Rhode I., Romania, Rwanda, Senegal, Sierra Leone, South Australia, South Carolina, South Dakota, South European Russi, Sudan, Switzerland, Tadzhikistan, Taiwan, Tanzania, Tasmania, Tennessee, Texas, Thailand, Turkey, Turkey-in-Europe, Turkmenistan, Uganda, Ukraine, Uzbekistan, Vermont, Victoria, Vietnam, Virginia, Washington, West Himalaya, West Siberia, West Virginia, Western Australia, Wisconsin, Yugoslavia, Zambia, Zaïre, Zimbabwe

Extinct in:

Spain

Introduced into:

Belgium, Czechoslovakia, Germany, Great Britain, Hungary, Mauritius, Netherlands, Réunion

Vallisneria P.Micheli ex L. appears in other Kew resources:

Date Reference Identified As Barcode Type Status Has image?
Vanderplank, F.L., Tanzania 35250.000 No

First published in Sp. Pl.: 1015 (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.

Literature

Flora of West Tropical Africa

  • F.T.A. 7: 5.
  • Sp. Pl. 1015 (1753)

Flora of Tropical East Africa

  • Lowden in Aquat. Bot. 13: 283 (1982)
  • Sp. Pl.: 1015 (1753)
  • Wright in F.T.A. 7: 5 (1897)

  • Flora of Tropical East Africa

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

  • 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