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

[FTEA]

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

Morphology General Habit
Lianas or climbing shrubs; white or clear latex in all parts (except in A. zambesiaca and occasionally A. schumannii); branches mostly lenticellate; branchlets terete, glabrous or sometimes puberulous
Morphology Leaves
Leaves opposite, petiolate; ochreae often widened into intrapetiolar stipules
Morphology Reproductive morphology Inflorescences
Inflorescence terminal, sometimes also axillary, cymose, few- or many-flowered, lax to very dense; peduncle mostly short; flowers open during the day, mostly fragrant
Morphology Reproductive morphology Flowers Calyx
Sepals connate at the extreme base, ciliate, mostly with colleters within
Morphology Reproductive morphology Flowers Corolla
Corolla with variously shaped heads in mature bud more or less characteristic for the species, mostly pubescent below the insertion of the stamens and interrupted between the filament ridges; lobes overlapping to the right in bud, ciliate; tube shorter or longer than the lobes; lobes entire to sinuate-crenate, spreading or recurved
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens with their tips reaching mouth of corolla tube; anthers sessile, sterile at the apex and below, pubescent below, coherent with the pistil head by a clavuncle
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary of two separate carpels (united in A. multiflora), pubescent at the apex; disk absent; pistil of a basal cone or cylinder, usually with a ring at the apex and a bilobed stigmoid apex
Morphology Reproductive morphology Fruits
Fruit of two separate, thin walled, long and linear follicles (1 syncarpous in A. multiflora), dehiscent on adaxial side; seeds with a short wing at the base and a hairy coma longer than the grain attached at the apex or on a beak at the apex.

[FZ]

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

Morphology General Habit
Scandent shrubs and lianes with milky latex.
Morphology General Spines
Spines and tendrils absent.
Morphology Leaves
Leaves opposite, with a pair of triangular stipules sometimes joined into a single intrapetiolar scale, without acarodomatia or petiolar glands.
Morphology Reproductive morphology Flowers
Flowers borne in terminal umbellate cymes.
Morphology Reproductive morphology Flowers Calyx
Calyx lobes imbricate, free to base, each overlapped margin with one or a pair of delicate scales inside at the base.
Morphology Reproductive morphology Flowers Corolla
Corolla hypocrateriform; tube ± cylindrical, slightly wider at the middle, glabrous on outer surface except for faint alternipetalous lines of puberulence, ± glabrous within except for a circle of long stiff downwards-pointing hairs below the level of stamen-insertion; corolla lobes 5, contorted, overlapping to the right, indumentum variable.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 5, sessile, inserted at about the middle of the corolla tube and with their tips reaching to the mouth of the tube; anthers conniving in a cone round the gynoecium, polliniferous in upper part only, joined to the clavuncle by a retinacle; dorsal surface of anthers often pubescent.
Morphology Reproductive morphology Flowers Receptacle
Receptacular disc absent.
Morphology Reproductive morphology Flowers Gynoecium Pistil
Ovary of 2 free multiovulate carpels pubescent at apex; style glabrous, gradually dilated towards the clavuncle, contracted and then widened into the capitate stigma.
Morphology Reproductive morphology Fruits
Fruit of 2 follicular mericarps.
Morphology Reproductive morphology Seeds
Seeds linear-compressed with an apical coma; endosperm absent.

Native to:

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

Alafia Thouars appears in other Kew resources:

First published in Gen. Nov. Madagasc.: 11 (1806)

Accepted by

  • Govaerts, R. (1995). World Checklist of Seed Plants 1(1, 2): 1-483, 1-529. MIM, Deurne.
  • 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 Mém. Inst. Sci. Madag., sér. B,2: 45 (1949).
  • —F.T.A. 4, 1: 195

Flora Zambesiaca

  • Gen. Nov. Madag.: 11 (1809).
  • Pichon in Bull. Jard. Bot. Brux. 24: 131 (1954).

Flora of Tropical East Africa

  • Gen. Nov. Madag.: 11 (1806)
  • Leeuwenberg in K.B. 52 (4): 769–839 (1997)

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

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