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  1. Family: Xyridaceae C.Agardh
    1. Xyris Gronov. ex L.

      1. This genus is accepted, and its native range is Tropical & Subtropical to N. America.


    Xyridaceae, J. M. Lock, M.A., Ph.D.. Flora of Tropical East Africa. 1999

    Annual or perennial herbs, often forming clumps; rhizomes, when present, short, horizontal or ascending
    Leaves virtually all basal; ligule present or not
    Inflorescence a condensed bracteate spike at the end of elongated peduncles which are often variously grooved or ridged; lower bracts of the spike sterile, occasionally elongated or reflexed
    Flowers borne singly in the axils of the fertile bracts, short-lived; calyx of 3 unequal segments, the adaxial hooded and enclosing the flower-bud, the laterals asymmetric and often keeled, free from one another (sometimes fused basally in American species); corolla yellow (blue in at least one West African species)
    Stamens alternating with 3 usually bifurcate staminodes divided apically into many moniliform hairs
    Ovary with parietal placentation (in East Africa)
    Fruit a loculicidal capsule.



    Native to:

    Alabama, Andaman Is., Angola, Argentina Northeast, Arkansas, Assam, Bangladesh, Belize, Benin, Bolivia, Borneo, Botswana, Brazil North, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, Burkina, Burundi, Cambodia, Cameroon, Cape Provinces, Central African Repu, Chad, China South-Central, China Southeast, Colombia, Congo, Connecticut, Costa Rica, Cuba, Delaware, District of Columbia, Dominican Republic, East Himalaya, Ecuador, Equatorial Guinea, Ethiopia, Florida, Free State, French Guiana, Gabon, Georgia, Ghana, Guatemala, Guinea, Guinea-Bissau, Gulf of Guinea Is., Guyana, Hainan, Honduras, Illinois, India, Indiana, Iowa, Ivory Coast, Jamaica, Jawa, Kentucky, Kenya, KwaZulu-Natal, Laos, Lesotho, Liberia, Louisiana, Madagascar, Maine, Maine, Malawi, Malaya, Mali, Maluku, Maryland, Masachusettes, Masachusettes, Mauritania, Mauritius, Mexico Gulf, Mexico Northeast, Mexico Southeast, Mexico Southwest, Michigan, Minnesota, Mississippi, Missouri, Mozambique, Myanmar, Namibia, Nepal, New Brunswick, New Caledonia, New Guinea, New Hampshire, New Jersey, New South Wales, New York, Newfoundland, Nicaragua, Niger, Nigeria, North Carolina, Northern Provinces, Northern Territory, Nova Scotia, Ohio, Oklahoma, Ontario, Panamá, Paraguay, Pennsylvania, Peru, Philippines, Puerto Rico, Queensland, Québec, Rhode I., Rwanda, Senegal, Sierra Leone, South Australia, South Carolina, Sri Lanka, Sudan, Sulawesi, Sumatera, Suriname, Swaziland, Taiwan, Tanzania, Tasmania, Tennessee, Texas, Thailand, Togo, Trinidad-Tobago, Uganda, Uruguay, Venezuela, Vermont, Victoria, Vietnam, Virginia, West Virginia, Western Australia, Windward Is., Wisconsin, Zambia, Zaïre, Zimbabwe

    Introduced into:


    Accepted Species


    Other Data

    Xyris Gronov. ex L. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jan 30, 2013 Stannard, B. [CFCR6168], Brazil K000837662
    Jan 30, 2013 Heringer, E.P. [17585], Brazil K000837671
    May 1, 1998 Harley, R.M. [H51227], Brazil K000837744
    Apr 22, 1998 Stannard, B. [52795], Brazil K000837740
    Harley, R.M. [54208], Brazil K000837739
    Harley, R.M. [54217], Brazil K000837742
    Harley, R.M. [54191], Brazil K000837743
    Harley, R.M. [24199], Brazil K000837761
    Harley, R.M. [16965 A], Brazil K000837762
    Harley, R.M. [54191], Brazil K000837773
    Talbot de Malahide, Australia 31831.000
    Curtis, W.M., Australia 30717.000
    Curtis, W.M., Australia 7296.000
    Souza, V.C. [CFCR 13926], Brazil K000837741
    Roque, N. [382], Brazil K000837738
    Forzza, R.C. [4623], Brazil K000837637
    Hatschbach, G.G. [52121], Brazil K000837670
    Sanaiotti, T.M. [294], Brazil K000837600


    First published in Sp. Pl.: 42 (1753)

    Accepted by

    • Phonsena, P., Chantaranothai, P. & Meesawat, A. (2013). Revision of Xyris L. (Xyridaceae) in Thailand Thai Forest Bulletin (Botany) 41: 102-139.
    • Govaerts, R. (2004). World Checklist of Monocotyledons Database in ACCESS: 1-54382. The Board of Trustees of the Royal Botanic Gardens, Kew.


    Flora of West Tropical Africa

    • F.T.A. 8: 7.
    • Sp. Pl. 42 (1753)

    Flora of Tropical East Africa

    • Malme in E.J. 48: 287–308 (1912)
    • N.E. Br. in F.T.A. 8: 6–25 (1901)
    • L., Gen. Pl., ed. 5: 25 (1754)
    • Sp. Pl.: 42 (1753)


    Flora of Tropical East Africa
    Flora of Tropical East Africa

    Flora of West Tropical Africa
    Flora of West Tropical Africa

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    Interactive Key to Seed Plants of Malesia and Indo-China
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