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This genus is accepted, and its native range is Tropical & Subtropical Old World.
Oxystelma esculentum

[FTEA]

Apocynaceae (part 2), David Goyder, Timothy Harris, Siro Masinde, Ulrich Meve, Johan Venter. Flora of Tropical East Africa, 2012

Morphology General Habit
Scrambling perennial herbs with white latex
Morphology Leaves
Leaves opposite
Morphology Reproductive morphology Inflorescences
Inflorescences racemose or subumbelliform
Morphology Reproductive morphology Flowers Calyx
Calyx divided to the base
Morphology Reproductive morphology Flowers Corolla
Corolla united to about halfway, shallowly campanulate; lobes triangular, acute, fringed with white hairs
Morphology Reproductive morphology Flowers Corona
Gynostegial corona of five staminal lobes, the basal parts gibbous, somewhat crumpled, adnate to the gynostegium; the apical parts free, erect, lanceolate-attenuate Corolline corona annular, pubescent
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens with anthers erect; appendages short, membranous, inflexed
Morphology Reproductive morphology Flowers Pollinia
Pollinia pendulous, cylindrical or elongate-clavate, attached in pairs by the attenuate ends to the short ovoid corpusculum
Morphology Reproductive morphology Flowers Gynoecium Style
Apex of stylar head pentagonal, truncate, not exceeding the anthers
Morphology Reproductive morphology Fruits
Follicles solitary or paired, lanceolate or inflated and subglobose
Morphology Reproductive morphology Seeds
Seeds compressed, ovate, surrounded with a narrow wing and terminating in a coma of white hairs.
Note
A genus of two species, one endemic to tropical Africa, the other principally distributed in Asia, but also occuring in E and NE tropical Africa.

[FSOM]

M. Thulin et al. Flora of Somalia, Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Morphology General Habit
Climbers with narrow leaves; latex white
Morphology Reproductive morphology Inflorescences
Inflorescences bostrychoid, few-­flowered, lax
Morphology Reproductive morphology Flowers Corolla
Corolla large, broadly campanulate; lobes fused for c. 1/2 of total length, white with dark red markings
Morphology Reproductive morphology Flowers Corona
Gynostegial corona of staminal lobes with subulate apices Outer corona ring corolline, pubescent
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anther connectives with apical appendages
Morphology Reproductive morphology Flowers Pollinarium
Pollinaria with a pair of pendent, club-shaped pollinia linked to the corpusculum by very short caudicles
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigmatic head flat
Morphology Reproductive morphology Fruits
Follicles single or paired, inflated or not; seeds ovate, with a tuft of hairs at one end.
Distribution
Two species in Africa and Asia.

Native to:

Assam, Bangladesh, Benin, Burkina, Cambodia, Cameroon, Chad, China South-Central, China Southeast, East Himalaya, Egypt, Ethiopia, Gambia, Ghana, Guinea, Guinea-Bissau, India, Ivory Coast, Jawa, Kenya, Laos, Lesser Sunda Is., Liberia, Mali, Myanmar, Nepal, Niger, Nigeria, Northern Territory, Oman, Pakistan, Palestine, Senegal, Sierra Leone, Sinai, Somalia, Sri Lanka, Sudan, Tanzania, Thailand, Vietnam, West Himalaya, Western Australia, Yemen

Introduced into:

Iraq

Oxystelma R.Br. appears in other Kew resources:

First published in Prodr. Fl. Nov. Holland.: 462 (1810)

Accepted by

  • Govaerts, R., Nic Lughadha, E., Black, N., Turner, R. & Paton, A. (2021). The World Checklist of Vascular Plants, a continuously updated resource for exploring global plant diversity. https://doi.org/10.1038/s41597-021-00997-6 Scientific Data 8: 215.

Literature

Flora of Somalia

  • Flora Somalia, Vol 3, (2006) Author: by D. Goyder [updated by M. Thulin 2008]
  • Rahman in Blumea 34: 519–520 (1990).

Flora of Tropical East Africa

  • F.T.A. 4(1): 382 (1902)
  • Mem. Wern. Soc. 1: 40 (1809)

Flora of Somalia
Flora of Somalia
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