1. Family: Rubiaceae Juss.
    1. Mitragyna Korth.

      1. This genus is accepted, and its native range is Tropical Africa, S. China to Tropical Asia.

    [FZ]

    Rubiaceae, D.M.Bridson & B.Verdcourt. Flora Zambesiaca 5:3. 2003

    Habit
    Tall trees.
    Leaves
    Leaves large, petiolate, with small domatia present in the nerve axils; stipule limbs large, leaf-like or membranous, glabrous or pubescent, free or joined near the base.
    Inflorescences
    Inflorescences terminal and/or axillary of 3–many spherical heads with pubescent receptacles, the flowering branches developing monopodially; bracteoles linear-spathulate, surrounding the sessile flowers which are free from each other.
    Flowers
    Flower buds pubescent at apex.
    Calyx
    Calyx tubes free from each other; limbs truncate or distinctly lobed, glabrous or ciliate, an epicalyx sometimes present.
    Corolla
    Corolla tube funnel-shaped, glabrous within and outside; lobes erect not opening very much, pubescent outside and terminated by short subulate deciduous glabrous appendages.
    Anthers
    Anthers included.
    Pistil
    Ovaries free, 2-locular; ovules numerous, ascending and imbricate on subpeltate placentas; style distinctly exserted, the pollen presenter ovoid or mitriform, receptive over all the surface.
    Fruits
    Fruits dry, dehiscing septicidally, the endocarp splitting into two valves each with rounded lobes, calyx lobes persistent; seeds small with winged margins.
    Note
    A genus of 3 species in tropical Africa, originally placed in Mitragyna, but recognized as a distinct section by Haviland in 1897. Ridsdale, in Blumea 24: 56 (1978), retained them in Mitragyna but with some doubts. The separation of Hallea from Mitragyna on rather small but constant floral characters is supported by palynology, wood and leaf anatomy and inflorescence development, also supported by Razafimandimbison & B. Bremer (2002).
    [FTEA]

    Rubiaceae, B. Verdcourt. Flora of Tropical East Africa. 1976

    Habit
    Tall trees with large petiolate leaves; small domatia present; stipules large, leafy or membranous, glabrous or pubescent, free or joined near the base
    Inflorescences
    Inflorescences terminal and/or axillary of 3–many spherical heads with pubescent receptacles, the flowering branches developing monopodially; bracteoles linear-spathulate, surrounding the sessile flowers which are free from each other
    Buds
    Buds pubescent at apex
    Calyx
    Calyx tubular, the limb truncate or distinctly lobed, glabrous or ciliate, an epicalyx sometimes present
    Corolla
    Corolla-tube funnel-shaped, glabrous within and outside; lobes erect, not opening very much, pubescent outside and terminated by short subulate deciduous glabrous appendages
    Anthers
    Anthers included
    Pistil
    Ovaries free, 2-locular; ovules numerous, ascending and imbricate on subpeltate placentas; style distinctly exserted, the stigmatic club ovoid or mitriform
    Fruits
    Fruits dry, dehiscing septicidally, the endocarp splitting into 2 valves each with rounded lobes
    Seeds
    Seeds small with winged margins.

    Images

    Distribution

    Native to:

    Andaman Is., Angola, Assam, Bangladesh, Benin, Borneo, Burkina, Burundi, Cabinda, Cambodia, Cameroon, Central African Repu, Chad, China South-Central, Congo, East Himalaya, Equatorial Guinea, Ethiopia, Gabon, Gambia, Ghana, Guinea, Guinea-Bissau, Gulf of Guinea Is., India, Ivory Coast, Jawa, Kenya, Laos, Liberia, Malawi, Malaya, Mali, Mauritania, Mozambique, Myanmar, Nepal, New Guinea, Nicobar Is., Niger, Nigeria, Philippines, Rwanda, Senegal, Sierra Leone, Sri Lanka, Sudan, Sumatera, Tanzania, Thailand, Togo, Uganda, Vietnam, West Himalaya, Zambia, Zaïre

    Mitragyna Korth. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Troupin, G. [4342], Congo, DRC 888.000

    First published in Observ. Naucl. Indic.: 19 (1839)

    Accepted by

    • Govaerts, R. (2003). World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Flora of West Tropical Africa
    • —F.T.A. 3: 40 (as Mitragyne). Nom. cons.

    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

    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