Bidens L.

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


Compositae, H. Beentje, C. Jeffrey & D.J.N. Hind. Flora of Tropical East Africa. 2005

Morphology General Habit
Annual or perennial herbs or shrubs
Morphology Leaves
Leaves opposite, simple or variously compound with segments linear to broadly ovate
Morphology Reproductive morphology Inflorescences Capitulum
Capitula radiate, terminal, solitary or arranged in cymes; involucre of usually green outer phyllaries and variously coloured inner phyllaries; paleae membranous, usually oblong-linear, 2–many-striate
Morphology Reproductive morphology Flowers Florets
Ray florets neuter with aristate or exaristate ovary or pistillate and fertile with well developed achenes and aristae, rays yellow or orange, rarely white (B. pilosa L.) or lemon-yellow, striate; disc florets yellow to brownish, corolla 5-lobed
Morphology Reproductive morphology Fruits
Achenes compressed or angled, striate-sulcate, ribbed, unmargined or margins narrowly winged or callose-thickened; at apex with or without aristae, aristae with or without antrorse and or retrorse barbs.


M. Thulin et al. Flora of Somalia, Vol. 1-4 [updated 2008]

Morphology General Habit
Annual (in Somalia) or perennial herbs or shrubs
Morphology Leaves
Leaves opposite, petiolate, pinnately 3–9-lobed to bipinnatisect
Morphology Reproductive morphology Inflorescences
Capitula erect at anthesis, in open corymbose or paniculate cymes; receptacle flat to conical, paleate
Morphology Reproductive morphology Inflorescences Bracts Phyllaries
Outer phyllaries herbaceous, 1–3-veined, 1-seriate Inner phyllaries grey- or orange-striated with yellow scarious margins, membranous, 1-seriate
Ray florets yellow or white, neuter or pistillate, rarely with pistillodes or staminodes
Morphology Reproductive morphology Inflorescences Bracts Palea
Paleae membranous, white to pale yellowish-brown, 2–9-striated, oblong-linear
Morphology Reproductive morphology Flowers Disc
Disk florets yellow, bisexual; corolla 5-lobed; anthers brown, caudate or sagittate at the base, with triangular-ovate appendage; style branches penicillate
Morphology Reproductive morphology Fruits
Achenes flattened or tetragonal, black, striate-sulcate, variously hairy, not winged, margins sometimes callose-thickened
Morphology Reproductive morphology Seeds Pappus
Pappus aristae 2–4, rarely absent, backwardly barbed, trigonous at base.
Genus of over 200 species, with worldwide distribution, and with centers of diversity in Africa and Mexico.

Native to:

Afghanistan, Alabama, Alaska, Albania, Alberta, Algeria, Altay, Amur, Angola, Argentina Northeast, Argentina Northwest, Arizona, Arkansas, Aruba, Assam, Austria, Bahamas, Baltic States, Belarus, Belgium, Belize, Benin, Bolivia, Botswana, Brazil North, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, British Columbia, Bulgaria, Burkina, Burundi, Buryatiya, California, Cambodia, Cameroon, Cape Provinces, Cayman Is., Central African Repu, Central European Rus, Chad, Chile Central, Chile North, China North-Central, China South-Central, China Southeast, Chita, Colombia, Colorado, Congo, Connecticut, Corse, Costa Rica, Cuba, Czechoslovakia, Delaware, Denmark, District of Columbia, Djibouti, Dominican Republic, East Aegean Is., East European Russia, East Himalaya, Ecuador, El Salvador, Eritrea, Ethiopia, Finland, Florida, France, Free State, French Guiana, Galápagos, Gambia, Georgia, Germany, Ghana, Great Britain, Greece, Guatemala, Guinea, Guinea-Bissau, Guyana, Hainan, Haiti, Hawaii, Honduras, Hungary, Idaho, Illinois, India, Indiana, Inner Mongolia, Iowa, Iran, Iraq, Ireland, Irkutsk, Italy, Ivory Coast, Jamaica, Japan, Jawa, Juan Fernández Is., Kamchatka, Kansas, Kazakhstan, Kentucky, Kenya, Khabarovsk, Kirgizstan, Korea, Krasnoyarsk, Krym, Kuril Is., KwaZulu-Natal, Laccadive Is., Lebanon-Syria, Leeward Is., Lesotho, Louisiana, Maine, Malawi, Mali, Manchuria, Manitoba, Marquesas, Maryland, Massachusetts, Mexican Pacific Is., Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Michigan, Minnesota, Mississippi, Missouri, Mongolia, Montana, Mozambique, Myanmar, Namibia, Nansei-shoto, Nebraska, Nepal, Netherlands, Netherlands Antilles, Nevada, New Brunswick, New Guinea, New Hampshire, New Jersey, New Mexico, New York, Newfoundland, Nicaragua, Nigeria, North Carolina, North Caucasus, North Dakota, North European Russi, Northern Provinces, Northern Territory, Northwest European R, Northwest Territorie, Norway, Nova Scotia, Nunavut, Ohio, Oklahoma, Oman, Ontario, Oregon, Pakistan, Palestine, Panamá, Paraguay, Pennsylvania, Peru, Philippines, Pitcairn Is., Poland, Portugal, Primorye, Prince Edward I., Puerto Rico, Qinghai, Queensland, Québec, Rhode I., Romania, Rwanda, Sakhalin, Sardegna, Saskatchewan, Saudi Arabia, Senegal, Sicilia, Sierra Leone, Society Is., Socotra, Somalia, South Carolina, South Dakota, South European Russi, Spain, Sri Lanka, Sudan, Suriname, Sweden, Switzerland, Tadzhikistan, Taiwan, Tanzania, Tennessee, Texas, Thailand, Tibet, Togo, Tonga, Transcaucasus, Trinidad-Tobago, Tubuai Is., Turkey, Turkey-in-Europe, Turkmenistan, Tuva, Uganda, Ukraine, Uruguay, Utah, Uzbekistan, Venezuela, Venezuelan Antilles, Vermont, Vietnam, Virginia, Washington, West Himalaya, West Siberia, West Virginia, Western Australia, Windward Is., Wisconsin, Wyoming, Xinjiang, Yakutskiya, Yemen, Yugoslavia, Yukon, Zambia, Zaïre, Zimbabwe

Introduced into:

Azores, Baleares, Bangladesh, Canary Is., Cape Verde, Caroline Is., Chagos Archipelago, Comoros, Cook Is., Cyprus, Egypt, Fiji, Gabon, Gilbert Is., Gulf of Guinea Is., Kazan-retto, Kermadec Is., Laos, Libya, Line Is., Madagascar, Madeira, Malaya, Maldives, Marianas, Marshall Is., Mauritania, Mauritius, Morocco, New Caledonia, New South Wales, New Zealand North, Nicobar Is., Niue, Norfolk Is., Ogasawara-shoto, Rodrigues, Réunion, Samoa, Selvagens, Seychelles, Sinai, South Australia, South China Sea, Swaziland, Tuamotu, Victoria

Bidens L. appears in other Kew resources:

Date Reference Identified As Barcode Type Status Has image?
Ash [53], Ethiopia 40082.000 No
França, F. [3835], Brazil K001031893 Yes
Harley, R.M. [54427], Brazil K001133343 Yes
Miranda, E.B. [169], Brazil K001031892 Yes

First published in Sp. Pl.: 831 (1753)

Accepted by

  • Govaerts, R., Nic Lughadha, E., Black, N., Turner, R. & Paton, A. (2021). The World Checklist of Vascular Plants, a continuously updated resource for exploring global plant diversity. Scientific Data 8: 215.


Flora of West Tropical Africa

  • Sherff in Publ. Field Mus. 16 (1937).
  • —F.T.A. 3: 392

Flora of Somalia

  • Flora Somalia, (2000) Author: by Mesfin Tadesse [updated by M. Thulin 2008]
  • Mesfin Tadesse in Kew Bull. 48: 437–516 (1993).
  • Mesfin Tadesse in Symb. Bot. Upsal. 24: 1–138 (1984)

Flora of Tropical East Africa

  • L., Gen. Pl.: 362 (1754)
  • Mesfin in K.B. 48: 437–516 (1993)
  • Sp. Pl.: 831 (1753)

  • Flora of Somalia

    Flora of Somalia

  • Flora of Tropical East Africa

    Flora of Tropical East Africa

  • Herbarium Catalogue Specimens

    Digital Image © Board of Trustees, RBG Kew

  • Kew Backbone Distributions

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. Published on the Internet at and
    © Copyright 2017 World Checklist of Selected Plant Families.

  • Kew Names and Taxonomic Backbone

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. Published on the Internet at and
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families.

  • Plants and People Africa

    Common Names from Plants and People Africa
    © Plants and People Africa