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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

Morphology General Habit
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
Morphology Leaves
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
Morphology Reproductive morphology Flowers
Flowers bisexual
Morphology Reproductive morphology Flowers Calyx
Calyx 5-parted, sepals almost free
Morphology Reproductive morphology Flowers Corolla
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
Morphology Reproductive morphology Flowers Gynoecium Ovary
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
Morphology Reproductive morphology Fruits
Capsules ± globose, echinate, dehiscing septicidally and loculicidally, or only septicidally, into 5, singleseeded mericarps
Morphology Reproductive morphology Seeds
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

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 2021. 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 2021. 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.