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This genus is accepted, and its native range is N. & W. Tropical Africa to Tanzania, Madagascar, Arabian Peninsula to Myanmar.
Leptadenia arborea

[FTEA]

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

Morphology Leaves
Leafless shrubs (but not in FTEA area) or woody twiners with well developed leaves; latex clear and watery Leaves opposite
Morphology Reproductive morphology Inflorescences
Inflorescences with many flowers in pedunculate, extra-axillary umbels
Morphology Reproductive morphology Flowers Corolla
Corolla rotate with fleshy, pubescent or lanate lobes and a short campanulate tube.
Morphology Reproductive morphology Flowers Corona
Corolline corona lobes present in the corolla lobe sinuses.
Morphology Reproductive morphology Flowers Gynostegium
Gynostegium with or without an annular staminal corona at the base.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers incumbent over the stylar head, lacking apical appendages
Morphology Reproductive morphology Flowers Pollinarium
Pollinaria subhorizontal or suberect; corpusculum minute, reddish brown; translator arms translucent, flattened and obtriangular.
Morphology Reproductive morphology Flowers Pollinia
Pollinia somewhat flattened and with a translucent apical germination zone
Morphology Reproductive morphology Fruits
Follicles developing singly, fusiform, slender or stout.
Morphology Reproductive morphology Seeds
Seed smooth, flattened, with a silky coma.

[FSOM]

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

Morphology General Habit
Leafless shrubs or woody twiners with well developed leaves; latex clear and watery
Morphology Reproductive morphology Inflorescences
Inflorescences with many flowers in subsessile or pedunculate, extra-axillary umbels
Morphology Reproductive morphology Flowers Corolla
Corolla rotate with a short campanulate tube and fleshy, pubescent or lanate lobes with slightly revolute margins
Morphology Reproductive morphology Flowers Corona
Corolline corona-lobes present in the sinuses between the corolla-lobes
Morphology Reproductive morphology Flowers Gynostegium
Gynostegium largely enclosed by the corolla-tube and corolline corona-lobes, with or without an annular corona at the base
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers incumbent over the stigmatic head, lacking apical appendages
Morphology Reproductive morphology Flowers Pollinarium
Pollinaria subhorizontal or suberect; corpusculum minute; translator arms flattened and obtriangular; pollinia somewhat flattened and with a translucent apical germination zone
Morphology Reproductive morphology Fruits
Follicles developing singly, fusiform with a long-attenuate beak, slender or stout; seeds flattened, smooth, with a tuft of silky hairs at one end.
Distribution
Five species bordering the Sahara and extending eastwards to Arabia, the Indian subcontinent and Madagascar.

Native to:

Algeria, Bangladesh, Benin, Burkina, Cambodia, Cameroon, Central African Repu, Chad, Comoros, Djibouti, Egypt, Eritrea, Ethiopia, Gambia, Ghana, Guinea, Guinea-Bissau, Gulf States, India, Iran, Ivory Coast, Kenya, Laccadive Is., Libya, Madagascar, Mali, Mauritania, Morocco, Mozambique Channel I, Myanmar, Nepal, Niger, Nigeria, Oman, Pakistan, Palestine, Saudi Arabia, Senegal, Sinai, Somalia, Sri Lanka, Sudan, Tanzania, Uganda, Yemen

Leptadenia R.Br. appears in other Kew resources:

First published in Mem. Wern. Nat. Hist. Soc. 1: 34 (1809)

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

  • Bullock in Kew Bull. 10: 287–292 (1955).
  • Flora Somalia, Vol 3, (2006) Author: by D. Goyder [updated by M. Thulin 2008]

Flora of Tropical East Africa

  • K.B. 10: 265–292 (1955)
  • On the Asclepiadeae: 34 (1810);

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