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This genus is accepted, and its native range is Tropical & S. Africa, Madagascar, Malesia to Queensland.
A specimen from Kew's Herbarium

[FTEA]

Apocynaceae, E.A. Omino. Flora of Tropical East Africa. 2002

Morphology General Habit
Shrubs or trees, repeatedly dichotomously branched; bark and branchlets with some white latex
Morphology Leaves
Leaves opposite; petiole or leaf bases of a pair connate into a short ochrea, with a single row of colleters in the axils
Morphology Reproductive morphology Inflorescences
Inflorescences cymose, in pairs at the forks of branches; bracts deciduous, rarely persistent, leaving conspicuous scars
Morphology Reproductive morphology Flowers
Flowers often fragrant
Morphology Reproductive morphology Flowers Calyx
Calyx green, usually shed with the corolla, united for over 2/3, inside with colleters
Morphology Reproductive morphology Flowers Corolla
Corolla creamy or yellow; tube shorter or only slightly longer than than the calyx, twisted; lobes in bud overlapping to the left
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens exserted or included; anthers introrse, sessile, narrowly triangular, acuminate at the sterile apex, sagittate at the base, glabrous
Morphology Reproductive morphology Flowers Gynoecium Pistil
Ovary broadly ovoid, of two carpels, free or connate at the base, rarely entirely fused; disk present; pistil head with a ring at the base, obovoid, coherent with the connectives of the anthers; stigmoid apex short; style and stigma shed with the corolla
Morphology Reproductive morphology Fruits
Fruits of two fleshy carpels, free, less often partly of wholly united
Morphology Reproductive morphology Seeds
Seeds surrounded by a yellow or orange pulpy aril, numerous; endosperm copious, starchy, creamy to white, ruminate, surrounding the spatulate creamy white embryo
Distribution
An Old World genus of 12 species, 7 in Africa and 5 in SE Asia.

[FZ]

Apocynaceae, A. J. M. Leeuwenberg & F. K. Kupicha et al. Flora Zambesiaca 7:2. 1985

Morphology General Habit
Shrubs or trees, repeatedly dichotomously branched and with bark usually with some white latex; 2 inflorescences in the forks when flowering.
Morphology Stem
Branchlets terete, mostly deeply sulcate when dry, with white latex.
Morphology Leaves
Leaves opposite, those of a pair equal or unequal, usually petiolate; petioles or leaf bases of a pair connate into a short ocrea, with a single row of colleters in the axils; lamina elliptic or obovate or narrowly so, cuneate at the base or decurrent into the petiole.
Morphology Reproductive morphology Inflorescences
Inflorescence in the forks of branches usually long-pedunculate, corymbose, usually rather lax.
Morphology Reproductive morphology Inflorescences Bracts
Bracts deciduous or less often (not in the F.Z. area) more or less persistent.
Morphology Reproductive morphology Flowers
Flowers actinomorphic, often fragrant.
Morphology Reproductive morphology Flowers Calyx
Calyx green, campanulate to cylindrical, usually shed with the corolla, with colleters inside.
Morphology Reproductive morphology Flowers Corolla
Corolla mostly creamy or yellow; tube shorter or (in the species of the F.Z. area) only slightly longer than the calyx, twisted, variously shaped; lobes in bud overlapping to the left, spreading or recurved.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens exserted or included; anthers sessile, narrowly triangular, acuminate at the sterile apex, sagittate at the base, glabrous, introrse.
Morphology Reproductive morphology Flowers Gynoecium Pistil
Pistil glabrous; ovary mostly broadly ovoid; carpels free or connate at the base, surrounded by a ring-shaped entire or lobed disk; disk adnate to the abaxial sides of the carpels; style thickened at the apex; clavuncula with a thin, recurved, undulate, entire, or lobed ring at the base, obovoid with 5 short lateral lobes, coherent with the connectives of the anthers. Style and stigma shed together with the corolla; stigma short.
Morphology Reproductive morphology Fruits
Fruit two free or less often partly or completely united carpels (the latter not in the F.Z. area); wall soft, carnose, often thickish, creamy or yellow.
Morphology Reproductive morphology Seeds
Seeds surrounded by a yellow or orange pulpy aril, usually numerous, large, obliquely ellipsoid or less often reniform, at the hilar side with one deep groove to half their width, less deeply grooved at the other sides, with a minutely tuberculate or honeycomb-like structure; endosperm copious, starchy, creamy to white, ruminate, surrounding the spathulate embryo.

Native to:

Angola, Benin, Borneo, Burkina, Burundi, Cabinda, Cameroon, Cape Provinces, Central African Repu, Congo, Equatorial Guinea, Gabon, Gambia, Ghana, Guinea, Guinea-Bissau, Gulf of Guinea Is., Ivory Coast, Jawa, Kenya, KwaZulu-Natal, Lesser Sunda Is., Liberia, Madagascar, Malawi, Mali, Maluku, Mozambique, New Guinea, Nigeria, Philippines, Queensland, Senegal, Sierra Leone, Sudan, Sulawesi, Sumatera, Tanzania, Togo, Uganda, Zambia, Zaïre, Zimbabwe

Introduced into:

China South-Central, China Southeast, India

Voacanga Thouars appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Keay, R.W.J. [37144], Nigeria 7032.000
Watts, J. [913], Cameroon K000540752

First published in Gen. Nov. Madagasc.: 10 (1806)

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

  • Pichon in Bull. Mus. Hist. Nat. sér. 2, 19: 409 (1947).
  • —F.T.A. 4, 1: 151

Flora Zambesiaca

  • Gen. Nov. Madag.: 10 (1806).

Flora of Tropical East Africa

  • Gen. Nov. Madag.10 (1806)
  • Leeuwenberg in Wageningen Agric. Univ. Pap. 85, 3: 9–122 (1985)

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 2021. 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 2021. 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