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This genus is accepted, and its native range is E. & S. Tropical Africa.
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
Shrub or small tree, repeatedly dichotomously branched and with 2 inflorescences in the forks when flowering, with white latex.
Morphology Stem
Branchlets terete.
Morphology Leaves
Leaves opposite, those of a pair equal or unequal, shortly petiolate or sometimes sessile; petioles or leaf–bases of a pair united at the base and forming a very short ocrea, with a single row of colleters in the axils; lamina elliptic, narrowly elliptic, or narrowly obovate, cuneate, rounded or subcordate at the base.
Morphology Reproductive morphology Inflorescences
Inflorescence pedunculate, corymbose, lax.
Morphology Reproductive morphology Inflorescences Bracts
Bracts caducous before the flowers open.
Morphology Reproductive morphology Flowers
Flowers actinomorphic except for the slightly curved corolla tube.
Morphology Reproductive morphology Flowers Calyx
Calyx pale green, persistent, even under the fruit.
Morphology Reproductive morphology Flowers Corolla
Corolla white, creamy, or pale yellow, with many red longitudinal lines at the base of the lobes and at the apex of the tube; tube longer than the calyx; lobes spreading(?) or suberect in bud overlapping to the left.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens included; anthers sessile, narrowly triangular, acuminate at the sterile apex, sagittate at the base, hirto-pubescent outside on the connective and inside between the tails, introrse.
Morphology Reproductive morphology Flowers Gynoecium Pistil
Pistil glabrous; ovary broadly ovoid, composed of 2 free carpels, surrounded by an entire disk, which is united with the distal sides of the ovary; style only slightly widened at the apex; clavuncula composed of an entire, thin, slightly recurved ring and a subglobose head, topped by 2 parallel linear erect stigma-lobes.
Morphology Reproductive morphology Flowers Gynoecium Style
Style and stigma remaining on the ovary when the corolla is shed.
Morphology Reproductive morphology Fruits
Fruit composed of 2 free carpels which usually both develop and which dehisce adaxially; wall soft, orange inside.
Morphology Reproductive morphology Seeds
Seeds surrounded by a darker orange pulpy aril, few, rather large, obliquely ellipsoid or ovoid; at the hilar side with one deep groove to half their width, less deeply grooved at the other sides, minutely pustulate; endosperm copious, starchy, creamy, ruminate, surrounding the spathulate embryo.

[FTEA]

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

Morphology General Habit
Shrub repeatedly dichotomously branched; white latex present in most parts
Morphology Leaves
Leaves opposite; petiole or leaf bases of a pair united at the base, forming a very short ochrea, with a single row of colleters in the axils
Morphology Reproductive morphology Inflorescences
Inflorescence in pairs in the forks, pedunculate, corymbose, lax
Morphology Reproductive morphology Flowers Corolla
Corolla white, creamy or pale yellow, with many red longitudinal lines at the base of the lobes and at the apex of the tube; lobes in bud overlapping to the left.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens included; anthers introrse, sessile, narrowly triangular, acuminate, apex sterile, sagittate at the base.
Morphology Reproductive morphology Flowers Gynoecium Pistil
Pistil glabrous; ovary broadly ovoid, of 2 free carpels, surrounded at the base by an entire disk; pistil head composed of a stigmatic subglobose basal part surrounded by an entire, thin, slightly recurved ring and a bifid stigmoid apex
Morphology Reproductive morphology Fruits
Fruit of 2, free pod-like follicles, dehiscent adaxially; pericarp soft, orange inside; seeds surrounded by a darker orange pulpy aril, obliquely ellipsoid or ovoid; endosperm copious, starchy, creamy, ruminate, surrounding the spatulate embryo.

Native to:

Kenya, Malawi, Mozambique, Tanzania, Zambia

Carvalhoa K.Schum. appears in other Kew resources:

First published in H.G.A.Engler & K.A.E.Prantl, Nat. Pflanzenfam. 4(2): 189 (1895)

Accepted by

  • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. 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 Zambesiaca

  • in Engler & Prantl, Nat. Pflanzenfam. 4, 2: 189 (1895).

Flora of Tropical East Africa

  • Leeuwenberg in F.Z. 7, 2: 444 (1985)
  • in Agric. Univ. Wageningen Papers 85 (2): 49–55 (1985)
  • in E. & P. Pf. 4, 2: 189 (1895)

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