1. Family: Hydrocharitaceae Juss.
    1. Vallisneria P.Micheli ex L.

      1. 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

    Habit
    Dioecious, submerged, freshwater, perennial herbs
    Roots
    Roots simple
    Stem
    Stems elongate, shortly stoloniferous or very shortly erect
    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
    Stipules
    Stipules 0
    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
    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
    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
    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
    Fruits
    Fruit elongate, narrowly cylindric, opening by decay of the pericarp
    Seeds
    Seeds narrowly ellipsoid to oblong, striate.

    Images

    Distribution

    Doubtfully present in:

    Cameroon

    Native to:

    Afghanistan, Alabama, Algeria, Assam, Bangladesh, Botswana, Bulgaria, Burundi, 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, Masachusettes, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Southeast, Michigan, Minnesota, Mississippi, Missouri, Mozambique, Myanmar, Namibia, Nansei-shoto, 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, Spain, 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

    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
    Vanderplank, F.L., Tanzania 35250.000

    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)
    • Wright in F.T.A. 7: 5 (1897)
    • Sp. Pl.: 1015 (1753)

    Sources

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

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. 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 2019. 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