1. Family: Plantaginaceae Juss.
    1. Callitriche L.

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

    [FTEA]

    Callitrichaceae, Inga Hedberg & Olov Hedberg. Flora of Tropical East Africa. 2003

    Note
    The leaf shape and arrangement vary considerably with the habitat of the plant Description as for the family All tropical African material was earlier classified as C. stagnalis Scop., but recent taxonomic work has shown that several species can be recognized based on morphological, pollen and chromosomal differences. The four tropical African species fall well within the range of variation Chromosome counts from European material shows the somatic numbers between 6 and 40 The most useful character for identification is that of ripe fruits The adaptation of the genus to aquatic life has resulted in the reduction of several morphological features, so that only a few reliable characters remain which can be used for identification Terrestrial plants tend to have ovate or suborbicular leaves Submerged plants often have lanceolate or linear leaves and long internodes, while in plants where the shoots reach the surface the internodes tend to be shorter and have rosettes of elliptic or spathulate leaves Other taxonomically useful characters, albeit unsuitable for use in species’ keys, are the morphology of pollen and the number of chromosomes This pattern is present in all tropical African species In pollen, the exine surface shows the Croton pattern, which is a reticulate pattern with processes (clavae) at the intersections of the walls (muri) (Erdtman, G., 1952, Pollen morphology and plant taxonomy: Angiosperms, p. 173)

    Images

    Distribution

    Native to:

    Afghanistan, Alabama, Alaska, Albania, Alberta, Aleutian Is., Algeria, Altay, Amsterdam-St.Paul Is, Amur, Antipodean Is., Argentina Northeast, Argentina Northwest, Argentina South, Arizona, Arkansas, Austria, Azores, Baleares, Baltic States, Bangladesh, Belarus, Belgium, Bolivia, Borneo, Brazil Northeast, Brazil South, Brazil Southeast, British Columbia, Bulgaria, Burundi, Buryatiya, California, Cameroon, Canary Is., Cape Provinces, Central European Rus, Chatham Is., Chile Central, Chile North, Chile South, China North-Central, China South-Central, China Southeast, Chita, Colombia, Colorado, Connecticut, Corse, Costa Rica, Crozet Is., Cuba, Cyprus, Czechoslovakia, Delaware, Denmark, District of Columbia, Dominican Republic, East Aegean Is., East European Russia, East Himalaya, Ecuador, Eritrea, Ethiopia, Falkland Is., Finland, Florida, France, Føroyar, Galápagos, Georgia, Germany, Great Britain, Greece, Greenland, Guatemala, Heard-McDonald Is., Honduras, Hungary, Iceland, Idaho, Illinois, India, Indiana, Iowa, Iran, Ireland, Irkutsk, Italy, Japan, Jawa, Kamchatka, Kansas, Kazakhstan, Kentucky, Kenya, Kerguelen, Kermadec Is., Khabarovsk, Kirgizstan, Korea, Krasnoyarsk, Kriti, Krym, Kuril Is., KwaZulu-Natal, Labrador, Lebanon-Syria, Libya, Louisiana, Macquarie Is., Madagascar, Madeira, Magadan, Maine, Manchuria, Manitoba, Marion-Prince Edward, Maryland, Masachusettes, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Michigan, Minnesota, Mississippi, Missouri, Mongolia, Montana, Morocco, Nansei-shoto, Nebraska, Nepal, Netherlands, Nevada, New Brunswick, New Guinea, New Hampshire, New Jersey, New Mexico, New South Wales, New York, New Zealand North, New Zealand South, Newfoundland, North Carolina, North Caucasus, North Dakota, North European Russi, Northwest European R, Northwest Territorie, Norway, Nova Scotia, Nunavut, Ohio, Oklahoma, Ontario, Oregon, Pakistan, Palestine, Paraguay, Pennsylvania, Peru, Poland, Portugal, Primorye, Prince Edward I., Qinghai, Queensland, Québec, Rhode I., Romania, Rwanda, Sakhalin, Sardegna, Saskatchewan, Sicilia, South Australia, South Carolina, South Dakota, South European Russi, South Georgia, Spain, Sri Lanka, Sudan, Sulawesi, Sumatera, Svalbard, Sweden, Switzerland, Tadzhikistan, Taiwan, Tanzania, Tasmania, Tennessee, Texas, Thailand, Tibet, Transcaucasus, Tristan da Cunha, Tunisia, Turkey, Tuva, Uganda, Ukraine, Uruguay, Utah, Utah, Uzbekistan, Venezuela, Vermont, Victoria, Vietnam, Virginia, Washington, West Himalaya, West Siberia, West Virginia, Wisconsin, Wyoming, Xinjiang, Yakutskiya, Yugoslavia, Yukon, Zaïre

    Introduced into:

    Juan Fernández Is., Mauritius, Northern Provinces, Réunion, Western Australia

    Callitriche L. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Verdcourt, B. [5480], United Kingdom 54862.000
    Verdcourt, B. [5479], United Kingdom 54863.000

    First published in Sp. Pl.: 969 (1753)

    Accepted by

    • Lansdown, R.V. (2009). Nomenclatural notes on Callitriche (Callitrichaceae) in North America Novon 19: 364-369.
    • Lansdown, R.V. (2008). Water-starworths (Callitriche) of Europe Botanical Society of the British Isles Handbook 11: 1-180.
    • Lansdown, R.V. (2006). Notes on the water-starworts (Callitriche) recorded in Europe Watsonia 26: 105-120.
    • Govaerts, R. (2003). World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne.

    Literature

    Flora of Tropical East Africa
    • O. Hedberg & I. Hedberg, Tropical African Callitriche, Biol. Skr. 54: 19–30 (2001)
    • in Bull. Mus. Hist. Nat. Paris, ser 4, 10: 3–17 (1988)
    • Schotsman in B.J.B.B. 55: 291–296 (1985)
    • Gen. Pl., ed. 5: 5 (1754)

    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