Uapaca Baill.

This genus is accepted, and its native range is Tropical Africa, Madagascar.

[FZ]

Euphorbiaceae, A. Radcliffe-Smith. Flora Zambesiaca 9:4. 1996

Morphology General Habit
Dioecious trees or shrubs.
Morphology General Indumentum
Indumentum simple and/or minutely pseudolepidote.
Morphology Stem
Trunks occasionally stilt-rooted. Twigs stout, often with pronounced leaf scars, producing an exudate when cut, which hardens and darkens on drying.
Morphology Leaves
Leaves alternate, usually crowded towards the end of the twigs, petiolate or subsessile, stipulate or not; blades simple, often obovate, entire, penninerved.
Morphology Reproductive morphology Inflorescences
Inflorescences axillary, or borne on older wood, solitary or fasciculate, pedunculate, with a whorl of 5–12 involucrate imbricate tepaloid bracts surrounding the flowers; male inflorescences many-flowered, the flowers in dense globose capitula; female inflorescences 1-flowered.
Morphology Reproductive morphology Flowers
Male flowers sessile; calyx campanulate or turbinate, truncate, dentate or irregularly or regularly lobed, the lobes imbricate; petals absent; disk absent; stamens (4)5(6), free, episepalous, anthers erect, subbasifixed, introrse, thecae parallel, longitudinally dehiscent; pistillode cylindric-obconic, infundibuliform, hypocrateriform, pileiform or sometimes lobed. Female flowers sessile; calyx minute, truncate, sinuate or lobed, disciform; petals absent; disk absent; ovary (2)3(5)-locular, with 2 ovules per loculus; styles (2)3(5), free, thick, recurved, covering the ovary, multipartite to laciniate.
Morphology Reproductive morphology Fruits
Fruit drupaceous, indehiscent; mesocarp spongy; pyrenes (2)3(4), dorsally carinate and bisulcate, indurate, tardily bivalved.
Morphology Reproductive morphology Seeds
Seeds mostly 1 per pyrene, compressed, ecarunculate; endosperm fleshy; embryo straight; cotyledons broad, flat, green.

[FTEA]

Euphorbiaceae, A. R.-Smith. Flora of Tropical East Africa. 1987

Morphology General Habit
Dioecious pachycaul vernicifluous trees or shrubs with a simple and/or lepidote indumentum; trunks often with buttress-roots; twigs often strongly marked with leaf-scars
Morphology Leaves
Leaves alternate, usually crowded towards the ends of the branches, petiolate or subsessile, stipulate or not, simple, entire, penninerved
Morphology Reproductive morphology Inflorescences
Inflorescences axillary, solitary or fasciculate, pedunculate, with a whorl of 5–10 imbricate involucrate tepaloid bracts surrounding the flowers; ♂ inflorescences many-flowered, the flowers in dense globose capitula; ♀ inflorescences 1-flowered
Morphology Reproductive morphology Flowers
Male flowers sessile; calyx campanulate or turbinate, truncate, dentate, irregularly split or regularly 5–more-lobed, the lobes imbricate; petals 0; disc 0; stamens (4–)5(–6), free, episepalous, anthers erect, basifixed, introrse, thecae parallel, longitudinally dehiscent; pistillode cylindric-obconic, and often infundibuliform, hypocrateriform, or pileiform and sometimes lobate Female flowers sessile; calyx minute, truncate or sinuate, disc-like; petals 0; disc 0; ovary (2–)3(–5)-locular, with 2 ovules per locule; styles (2–)3(–5), free, thick, recurved, enveloping the ovary, multipartite or laciniate
sex Male
Male flowers sessile; calyx campanulate or turbinate, truncate, dentate, irregularly split or regularly 5–more-lobed, the lobes imbricate; petals 0; disc 0; stamens (4–)5(–6), free, episepalous, anthers erect, basifixed, introrse, thecae parallel, longitudinally dehiscent; pistillode cylindric-obconic, and often infundibuliform, hypocrateriform, or pileiform and sometimes lobate
sex Female
Female flowers sessile; calyx minute, truncate or sinuate, disc-like; petals 0; disc 0; ovary (2–)3(–5)-locular, with 2 ovules per locule; styles (2–)3(–5), free, thick, recurved, enveloping the ovary, multipartite or laciniate
Morphology Reproductive morphology Fruits
Fruit drupaceous, indehiscent; mesocarp spongy; pyrenes (2–) 3(–4), dorsally bisulcate, indurate
Morphology Reproductive morphology Seeds
Seeds mostly 1 per pyrene, compressed, ecarunculate; endosperm fleshy; cotyledons broad, flat.

Native to:

Angola, Benin, Burkina, Burundi, Cabinda, Cameroon, Central African Repu, Chad, Congo, Equatorial Guinea, Gabon, Ghana, Guinea, Guinea-Bissau, Gulf of Guinea Is., Ivory Coast, Kenya, Liberia, Madagascar, Malawi, Mali, Mozambique, Nigeria, Senegal, Sierra Leone, Sudan, Tanzania, Togo, Uganda, Zambia, Zaïre, Zimbabwe

Uapaca Baill. appears in other Kew resources:

Date Reference Identified As Barcode Type Status Has image?
Jun 1, 2010 Cheek, M. [11998], Cameroon K000678386 No
Troupin, G. [3432], Congo 15847.000 No
Etuge, M. [73], Cameroon K000180781 No

First published in Étude Euphorb.: 595 (1858)

Accepted by

  • Breteler, F.J. (2012). Flore du Gabon 43: 1-107. Muséum National D'Histoire Naturelle, Paris.
  • Breteler, F.J. (2013). Uapaca (Phyllanthaceae) in the Guineo-Congolian forest region: a synoptic revision Plant ecology and evolution 146: 75-94.
  • Govaerts, R., Frodin, D.G. & Radcliffe-Smith, A. (2000). World Checklist and Bibliography of Euphorbiaceae (and Pandaceae) 1-4: 1-1622. The Board of Trustees of the Royal Botanic Gardens, Kew.
  • McPherson, G. (2011). A review of Madagascan Uapaca (Euphorbiaceae s.l.) Adansonia, III, 33: 221-231.

Literature

Flora of West Tropical Africa

  • Pax & K. Hoffm. in Engl. Pflanzenr. Euph. 15: 298–311 (1922).
  • —F.T.A. 6, 1: 634

Flora Zambesiaca

  • De Wildeman, Contrib. Ét. Esp. Gen. Uapaca (1936).
  • Müller Argoviensis in De Candolle, Prodr. 15, 2: 489 (1866).
  • Étud. Gén. Euphorb.: 595 (1858).

Flora of Tropical East Africa

  • De Wild, Contrib. Étud. Esp. Uapaca (1936)
  • G.P. 3 (1): 282 (1880)
  • Hutch. in F.T.A. 6(1): 634 (1912)
  • Muell. Arg. in DC., Prodr. 15(2): 489 (1866)
  • Pax & K. Hoffm. in E.P. IV. 147 (15): 298 (1922)
  • Étud. Gén. Euph.: 595 (1858)

  • 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

  • Kew Backbone Distributions

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. 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 2022. 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