1. Family: Apiaceae Lindl.
    1. Sium L.

      1. This genus is accepted, and its native range is Temp. Northern Hemisphere.

    [FZ]

    Umbelliferae, J. F. M. Cannon. Flora Zambesiaca 4. 1978

    Habit
    Robust glabrous herbs with pinnate leaves.
    Flowers
    Flowers all hermaphrodite, in terminal and lateral compound umbels; bracts and bracteoles numerous and conspicuous.
    Calyx
    Sepals well developed to minute.
    Corolla
    Petals white to yellowish, more or less equal, relatively broad with an incurved apex, rarely the outer becoming subradiate.
    Fruits
    Fruit ovoid-cylindrical to globose, slightly compressed laterally and constricted at the commissure.
    Stylopodium
    Stylopodium conical or sometimes depressed; styles short and stiff, divergent.
    Seeds
    Ribs filiform, fairly prominent, lateral ribs marginal; mericarps sub-pentagonal in section, endosperm similar.
    Carpophore
    Carpophore entire or 2-partite at the apex.
    Vittae
    Vittae superficial, 1–6 in each interval and 2–6 in the commissural face.
    [FTEA]

    Umbelliferae, C.C. Townsend. Flora of Tropical East Africa. 1989

    Fruits
    Fruit glabrous, slightly laterally compressed, broadly ovoid to oblong, not or slightly narrowed to the commissure; primary ribs pale and prominent, narrow; vittae large to rather small, 1–3 in the valleculae, 2–6 on the commissure, visible in surface view or not, pericarp not very spongy; stylopodia shortly conical to rounded, styles short; carpophore undivided to shortly bipartite, adnate to the mericarps or not
    Seeds
    Endosperm bluntly pentagonal to almost round in section.
    Habit
    Coarse glabrous aquatic or marshland perennials
    Leaves
    Leaves simply pinnate with toothed, mucronate leaflets
    Inflorescences
    Umbels numerous, compound, pedunculate, leaf-opposed; involucre and involucel conspicuous, of several linear to toothed or dissected bracts and bracteoles
    Flowers
    Flowers hermaphrodite or polygamous
    Calyx
    Calyx-teeth conspicuous to ± obsolete
    Corolla
    Petals white to yellowish, emarginate above with an incurved apical lobule

    Images

    Distribution

    Native to:

    Afghanistan, Alabama, Albania, Altay, Amur, Austria, Baltic States, Belarus, Belgium, Bulgaria, Buryatiya, Central European Rus, China South-Central, Chita, Colorado, Connecticut, Czechoslovakia, Denmark, Finland, France, Germany, Great Britain, Greece, Hungary, Illinois, Ireland, Irkutsk, Italy, Japan, Kamchatka, Kazakhstan, Kentucky, Khabarovsk, Kirgizstan, Korea, Krasnoyarsk, Krym, Maine, Masachusettes, Minnesota, Mongolia, Netherlands, New Hampshire, New Mexico, New York, North European Russi, Northwest European R, Nunavut, Pakistan, Pennsylvania, Poland, Primorye, Qinghai, Rhode I., Romania, Sakhalin, South European Russi, Spain, Sweden, Switzerland, Tadzhikistan, Tennessee, Tibet, Transcaucasus, Turkmenistan, Tuva, Ukraine, Uzbekistan, Vermont, West Himalaya, West Siberia, Yakutskiya, Yugoslavia

    Introduced into:

    Chile Central, Chile North, Norway

    Sium L. appears in other Kew resources:

    First published in Sp. Pl.: 251 (1753)

    Literature

    Flora of West Tropical Africa
    • —F.T A. 3: 13.
    Flora Zambesiaca
    • Gen. Pl. ed. 5: 120 (1754).
    • Sp. Pl. 1: 251 (1753)
    Flora of Tropical East Africa
    • L., Gen. Pl., ed. 5: 120 (1754)
    • Sp. Pl.: 257 (1753)

    Sources

    Flora Zambesiaca
    Flora Zambesiaca
    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

    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