1. Family: Araceae Juss.
    1. Spirodela Schleid.

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

    [CATE]

    CATE Araceae, 17 Dec 2011. araceae.e-monocot.org

    General Description
    Fronds with (5)7-16(21) veins, with several layers of air spaces, with pigment cells, and with raphids and druses, surrounded at the base by a bifid scale (prophyll) covering the place of attachment of the roots; roots (5)7-16(21) per frond of which only 1-5 (never all) perforate the scale. Utricular scale-like leaf surrounding the flowers with narrow opening at the top; Pistil with 1 amphitropous ovule or 2-5 anatropous ovules; seeds 0.7-2.0 mm long, with 12-22 longitudinal ribs. Two spp., one widely distributed, one in South America.
    Diagnostic
    Free floating aquatic plant reduced to small, leaf-like, poorly differentiated fronds; roots and veins present. Differs from Landoltia in roots usually 7to 21 of which only 1 to 5, but never all, perforate the scale; veins usually 7-16; leaf surrounding the flowers with narrow opening at the top.
    Distribution
    Cosmopolitan.
    [FTEA]

    Lemnaceae, F. N. Hepper. Flora of Tropical East Africa. 1973

    Habit
    Floating aquatics
    Thallus
    Daughter thallus budding from lateral slit, remaining attached to parent by slender stipe, several individuals often connected Thallus discoid to oblong, 3–10 mm. long, 1.2–8 mm. wide
    Roots
    Roots 2– numerous, usually from swollen portion beneath thallus; root-cap acute
    Bulbils
    Turions (resting buds) produced in adverse conditions
    Flowers
    Flowers rarely produced, unisexual; spathe enclosing 2–3 ♂ and 1 ♀ flowers in lateral slit pouch; ♂ flowers each with 1 stamen; pistillate flower bearing 1–4 ovules.
    [CATE]

    CATE Araceae, 17 Dec 2011. araceae.e-monocot.org

    General Description
    Fronds with (3)5-7 veins, with several layers of air spaces, with pigment cells, and with raphids and druses, surrounded at base by a bifid scale (prophyll) covering the place of attachment of the roots; roots (1)2-7(12) of which all perforate the scale. Utricular scale-like leaf surrounding the flowers open at one side; pistill with one amphitropous ovule or 2-5 anatropous ovules; seeds 0.8-1.0 mm long with 10-15 longitudinal ribs.
    Distribution
    One species originally distributed in Australia and Eastern Asia, today world-wide distribution.
    Diagnostic
    Free floating aquatic plants reduced to small, leaf-like, poorly differentiated fronds; roots and veins present. Differs from Spirodela in having usually 2-7 roots of which all perforate the scale; veins usually 5-7; leaf surrounding the flowers open on one side.

    Images

    Distribution

    Native to:

    Alabama, Albania, Alberta, Altay, Argentina Northeast, Argentina Northwest, Argentina South, Arizona, Arkansas, Austria, Baltic States, Bangladesh, Belarus, Belgium, Belize, Benin, Bolivia, Borneo, Botswana, Brazil North, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, British Columbia, Bulgaria, Burundi, Buryatiya, California, Cape Provinces, Central African Repu, Central American Pac, Central European Rus, Chad, Chatham Is., Chile Central, China North-Central, China South-Central, China Southeast, Christmas I., Cocos (Keeling) Is., Colombia, Colorado, Congo, Connecticut, Corse, Costa Rica, Cuba, Czechoslovakia, Delaware, Denmark, District of Columbia, Dominican Republic, East European Russia, Ecuador, Egypt, El Salvador, Fiji, Finland, Florida, France, Free State, Georgia, Germany, Ghana, Great Britain, Greece, Guatemala, Haiti, Hawaii, Honduras, Hungary, Idaho, Illinois, India, Indiana, Iowa, Iran, Ireland, Irkutsk, Italy, Ivory Coast, Jamaica, Japan, Jawa, Kamchatka, Kansas, Kazakhstan, Kentucky, Kenya, Khabarovsk, Korea, Krasnoyarsk, Kriti, Kuril Is., KwaZulu-Natal, Lebanon-Syria, Leeward Is., Lesser Sunda Is., Louisiana, Madagascar, Madeira, Maine, Malawi, Malaya, Maldives, Maluku, Manchuria, Manitoba, Maryland, Masachusettes, Mauritius, Mexican Pacific Is., Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Michigan, Minnesota, Mississippi, Missouri, Montana, Morocco, Mozambique, Nebraska, Nepal, Netherlands, Nevada, New Brunswick, New Caledonia, New Hampshire, New Jersey, New Mexico, New South Wales, New York, New Zealand North, New Zealand South, Nicaragua, Nigeria, Norfolk Is., North Carolina, North Caucasus, North Dakota, North European Russi, Northern Provinces, Northern Territory, Northwest European R, Norway, Nova Scotia, Ohio, Oklahoma, Oregon, Palestine, Panamá, Paraguay, Pennsylvania, Peru, Philippines, Poland, Portugal, Primorye, Prince Edward I., Puerto Rico, Qinghai, Queensland, Québec, Rhode I., Romania, Rwanda, Sakhalin, Sardegna, Saskatchewan, Senegal, Sicilia, South Australia, South Carolina, South Dakota, South European Russi, Spain, Sudan, Sulawesi, Sumatera, Suriname, Switzerland, Taiwan, Tanzania, Tasmania, Tennessee, Thailand, Tibet, Togo, Transcaucasus, Trinidad-Tobago, Turkey, Turkey-in-Europe, Tuva, Uganda, Ukraine, Uruguay, Utah, Vanuatu, Venezuela, Vermont, Victoria, Vietnam, Virginia, Washington, West Siberia, West Virginia, Western Australia, Windward Is., Wisconsin, Wyoming, Yakutskiya, Yugoslavia, Zambia, Zaïre, Zimbabwe

    Introduced into:

    Canary Is., Guyana, Texas

    Spirodela Schleid. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Melville, R. [2934], Australia 36878.000

    First published in Linnaea 13: 391 (1839)

    Accepted by

    • Govaerts, R. & Frodin, D.G. (2002). World Checklist and Bibliography of Araceae (and Acoraceae): 1-560. The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Flora of West Tropical Africa
    • in Linnaea 13: 391 (1839).
    CATE Araceae
    • Landolt, E.
    Flora of Tropical East Africa
    • Daubs, Monogr. Lemnac.: 8 (1965)
    • Hegelm., Lemnac. Monogr.: 147 (1868)
    • in Linnaea 13: 391 (1839)

    Sources

    CATE Araceae
    Haigh, A., Clark, B., Reynolds, L., Mayo, S.J., Croat, T.B., Lay, L., Boyce, P.C., Mora, M., Bogner, J., Sellaro, M., Wong, S.Y., Kostelac, C., Grayum, M.H., Keating, R.C., Ruckert, G., Naylor, M.F. and Hay, A., CATE Araceae, 17 Dec 2011.
    http://creativecommons.org/licenses/by-nc-sa/3.0

    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 2018. 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 2018. 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