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  1. Family: Malvaceae Juss.
    1. Ayenia L.

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


    Sterculiaceae, Martin Cheek & Laurence Dorr; Nesogordonia, Laurence Dorr, Lisa Barnett. Flora of Tropical East Africa. 2007

    Lianas, shrubs, or small trees; stems unarmed (FTEA) or armed with prickles or spines; pubescent with stellate or simple hairs, or both intermixed, sometimes also with minute glandular hairs
    Leaves simple (FTEA) or lobed, palmately nerved from the base, pinnately nerved above, foliar nectary normally one per leaf on the midvein below and near the base of the blade (FTEA), or 3–5 on one each of the basal nerves, uni- or multi-aperturate (FTEA); stipulate, the stipules generally fugaceous. Inflorescences axillary, 3–many-flowered cymes; erect or pendulous
    Flowers bisexual
    Calyx 5-parted, sepals almost free
    Petals 5, free, unguiculate, cucullate, often with conspicuous lateral wings, and a distal appendage (lamina), appendage generally fleshy, simple; staminal tube campanulate or urceolate, stamens 5, antipetalous, alternating with 5 staminodes, anthers di-thecal, sessile, subsessile, or with noticeable filaments, longitudinally dehiscent, staminodes fleshy, sessile or not
    Ovary syncarpous, sessile or subsessile, 5-locular, covered with incipient spines; 2 ovules per locule, ovules anatropous, superposed, the lower one aborting; style ± united to apex; stigmas apical, inconspicuous, 5-fid or subentire
    Capsules ± globose, echinate, dehiscing septicidally and loculicidally, or only septicidally, into 5, singleseeded mericarps
    Seed ovoid or elongate, testa smooth or tuberculate, sometimes strophiolate, exalbuminous; cotyledons foliaceous, bilobed, wrapped around the radicle; germination epigeal.
    The name of the genus has often been misspelled, e.g. as ‘ Buettneria’ or ‘ Buettnera’



    Native to:

    Andaman Is., Angola, Argentina Northeast, Argentina Northwest, Arizona, Assam, Bahamas, Bangladesh, Belize, Benin, Bolivia, Borneo, Brazil North, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, California, Cambodia, Cameroon, Central African Repu, China South-Central, China Southeast, Colombia, Costa Rica, Cuba, Dominican Republic, East Himalaya, Ecuador, El Salvador, Ethiopia, Florida, French Guiana, Gabon, Ghana, Guatemala, Guyana, Hainan, Haiti, Honduras, India, Ivory Coast, Jamaica, Jawa, Kenya, Laos, Leeward Is., Lesser Sunda Is., Liberia, Madagascar, Malaya, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Myanmar, Nepal, Netherlands Antilles, New Mexico, Nicaragua, Nicobar Is., Nigeria, Panamá, Paraguay, Peru, Puerto Rico, Sierra Leone, Sudan, Sulawesi, Suriname, Tanzania, Texas, Thailand, Trinidad-Tobago, Turks-Caicos Is., Uganda, Uruguay, Venezuela, Vietnam, Windward Is., Zaïre

    Introduced into:

    Marquesas, Society Is., Tuamotu

    Accepted Species


    Other Data

    Ayenia L. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Coradin, L. [5842], Brazil K001214097
    Jan 1, 2010 Hamilton, W.D. [136], Brazil Byttneria K001213771
    Harley, R.M. [16087], Brazil Byttneria K001213570
    Harley, R.M. [16087], Brazil Byttneria K001213571
    Harley, R.M. [18197], Brazil Byttneria K001213578
    Philcox, D. [3694], Brazil Byttneria K001213558
    Philcox, D. [3694], Brazil Byttneria K001213559
    Philcox, D. [4099], Brazil Byttneria K001213560
    Hatschbach, G. [76652], Brazil Byttneria K001213565
    Hatschbach, G. [31525], Brazil Byttneria K001213582
    Hatschbach, G. [25963], Brazil Byttneria K001213583
    Hatschbach, G. [56486], Brazil Byttneria K001213596
    Lewis, G.P. [1473], Brazil Byttneria K001213590
    Boyce, P.C. [858], Vietnam Byttneria 72431.000
    Lindeman, J.C. [5482], Brazil Byttneria K001213577
    Krapovickas, A. [42813], Brazil Byttneria K001213563
    Ratter, J.A. [5567], Brazil Byttneria K001213589
    Ratter, J.A. [6162], Brazil Byttneria K001213591
    Pirani, J.R. [1714], Brazil Byttneria K001213773
    Pirani, J.R. [1771], Brazil Byttneria K001213774
    Pirani, J.R. [1771], Brazil Byttneria K001213775
    Pirani, J.R. [1714], Brazil Byttneria K001213776
    Irwin, H.S. [17442], Brazil Byttneria K001213561
    Irwin, H.S. [16883], Brazil Byttneria K001213562
    Irwin, H.S. [11434], Brazil Byttneria K001213581
    Heringer, E.P. [856], Brazil Byttneria K001213579
    Lima, A. [s.n.], Brazil Byttneria K001213782
    Anderson, W.R. [s.n.], Brazil Byttneria K001213588
    Anderson, W.R. [10975], Brazil Byttneria K001213772
    Sobral, M. [4339], Brazil Byttneria K001213783
    Pereira, B.A.S. [212], Brazil Byttneria K001213580
    Pereira, B.A.S. [212], Brazil Byttneria K001213779
    Pereira, B.A.S. [235], Brazil Byttneria K001213784
    Ribas, O.S. [2428], Brazil Byttneria K001213566
    Claussen, P. [s.n.], Brazil Byttneria K001213585
    Riedel [s.n.], Brazil Byttneria K001213575
    Hoehne, W. [s.n.], Brazil Byttneria K001213567
    Hoehne, W. [12176], Brazil Byttneria K001213568
    Pires, M.J. [1934], Brazil Byttneria K001213777
    Lima, J. [733], Brazil Byttneria K001213592
    Hopkins, M.J.G. [787], Brazil Byttneria K001213594
    Prance, G.T. [6053], Brazil Byttneria K001213781
    Glaziou, A.F.M. [10318], Brazil Byttneria K001213778
    Glaziou, A. [20730], Brazil Byttneria K001213574
    Glaziou, A. [14514], Brazil Byttneria K001213576
    Leitão Filho, H.F. [6074], Brazil Byttneria K001213780
    Silva, E.L.S. [650], Brazil Byttneria K001213595
    s.coll. [Cat. no. s.n.], Jawa Byttneria K001132303
    s.coll. [Cat. no. s.n.] Byttneria K001132304
    s.coll. [Cat. no. s.n.] Byttneria K001132305
    s.coll. [Cat. no. s.n.] Byttneria K001132306
    Burchell [8593], Brazil Byttneria K001213557
    Burchell [4262], Brazil Byttneria K001213586
    Burchell [4262], Brazil Byttneria K001213587
    Martius [1251], Brazil Byttneria K001213569
    Claussen [s.n.], Brazil Byttneria K001213572
    Claussen [s.n.], Brazil Byttneria K001213584
    Spruce, R. [1025] Byttneria K001213573
    Harley, R.M.:Hind, D.J.N. [27312], Brazil Byttneria K001213593


    First published in Kongl. Svenska Vetensk. Acad. Handl. 17: 24 (1756)

    Accepted by

    • Govaerts, R. (1995). World Checklist of Seed Plants 1(1, 2): 1-483, 529. MIM, Deurne.


    Art and Illustrations in Digifolia
    Digital Image © Board of Trustees, RBG Kew

    Flora of Tropical East Africa
    Flora of Tropical East Africa

    Herbarium Catalogue Specimens
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    Digital Image © Board of Trustees, RBG Kew

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. 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 2020. Published on the Internet at and
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families.

    Milliken, W., Klitgard, B. and Baracat, A. (2009 onwards), Neotropikey - Interactive key and information resources for flowering plants of the Neotropics.