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

[FZ]

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

Morphology General Habit
Rhizomatous creepers, climbing shrubs or lianas with white latex.
Morphology General Spines
Spines, tendrils and stipules absent.
Morphology Leaves
Leaves petiolate; petiole with glands on the adaxial side; lamina with the midrib impressed above and prominent beneath; secondary veins curved towards the margin, anastomosing; tufts of hairs (domatia) usually present in the axils of some secondary veins.
Morphology Reproductive morphology Inflorescences
Inflorescences axillary and sometimes at the same time terminal.
Morphology Reproductive morphology Flowers Calyx
Calyx lobes imbricate, almost free, at the base often with colleters inside.
Morphology Reproductive morphology Flowers Corolla
Corolla tube obconical, with a short urceolate base; inside with tufts of hairs alternating with the stamens; corolla lobes contorted in bud and overlapping to the right, spreading to reflexed.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens inserted almost at base of the corolla tube; anthers conivent in a cone around the gynoecium, adaxially pubescent, fertile in the upper part only, sagittate at the base, acuminate at the apex, coherent with the clavuncula by a retinacle (a circular patch between the tails inside on the connective 0·1–0·2 mm. in diam).
Morphology Reproductive morphology Flowers Gynoecium Pistil
Ovary semi-inferior; carpels two, multi-ovulate, connate at the extreme base only, abruptly narrowed into the style, surrounded by a disk; disk adnate to the ovary at the base only, ring-shaped, with 5 oblong lobes alternating with the stamens; style obconical to almost cylindrical; clavuncula consisting of a slightly 5-winged upper and a cylindrical lower portion, to the latter of which the 5 retinacles adhere; stigma bilobed.
Morphology Reproductive morphology Fruits
Fruit composed of 2 pendulous, follicular, narrowly cylindrical mericarps, these sometimes united at the apices.
Morphology Reproductive morphology Seeds
Seeds narrowly ellipsoid, more or less laterally compressed, not rostrate, with an apical coma; endosperm in a thin layer completely surrounding the embryo.

[FTEA]

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

Morphology General Habit
Climbing shrubs, lianas or rhizomatous creepers (not in our area) with white latex; tendrils, axillary glands and stipules absent
Morphology Leaves
Leaves opposite, petiolate; petiole with colleters above, near base to halfway up; domatia usually in some vein axils
Morphology Reproductive morphology Inflorescences
Inflorescences axillary and terminal, few to many-flowered cymes
Morphology Reproductive morphology Flowers
Flowers 5-merous, fragrant or not; sepals imbricate, with 0–10 colleters at the base inside
Morphology Reproductive morphology Flowers Corolla
Corolla tube with dense tufts of hairs alternating with the stamens inside, usually with scales or ridges above the insertion of the stamens; lobes contorted in bud, overlapping to the right
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens inserted in lower part of corolla tube; anthers connivent into a cone over the pistil head, coherent with the pistil head by a circular patch, the retinacle
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary semi-inferior, carpels two, connate at the extreme base, disk present, adnate to the ovary base; pistil head with a nearly cylindrical basal part, adhering to the anthers, a slightly 5-winged central part and a bilobed stigmoid apex
Morphology Reproductive morphology Fruits
Fruits of 2 pendulous, follicular mericarps, connate at the extreme base and sometimes at the apex, usually slightly constricted between the seeds; seeds with a deciduous apical coma directed towards the apex of the mericarp.

Doubtfully present in:

Mozambique

Native to:

Angola, Benin, Botswana, Burkina, Burundi, Cabinda, Cameroon, Caprivi Strip, Central African Repu, Congo, Equatorial Guinea, Gabon, Gambia, Ghana, Guinea, Guinea-Bissau, Ivory Coast, Kenya, Liberia, Malawi, Mali, Namibia, Niger, Nigeria, Senegal, Sierra Leone, Tanzania, Togo, Uganda, Zambia, Zaïre

Baissea A.DC. appears in other Kew resources:

First published in A.P.de Candolle, Prodr. 8: 424 (1844)

Accepted by

  • Govaerts, R. (1996). World Checklist of Seed Plants 2(1, 2): 1-492. 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

  • —F.T.A. 4, 1: 203.

Flora Zambesiaca

  • Prodr. 8: 424 (1844).

Flora of Tropical East Africa

  • Prodr. 8: 424 (1844)
  • de Kruif in F.Z. 7 (2): 495 (1985)
  • van Dilst in B.J.B.B. 64: 89–178 (1995)

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