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This genus is accepted, and its native range is Africa, Arabian Peninsula.
Orbea sp.

[FSOM]

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

Morphology General Habit
Succulent herbs; stems branching articulately, sometimes soboliferous, usually 4-angled, green or grey-green, often with dark markings, the teeth conspicuous, conical; latex clear
Morphology Leaves
Leaves modified to form the acute tipof the stem teeth, sometimes with stipular denticles
Morphology Reproductive morphology Inflorescences
Inflorescences from the upper portion of the stems, usually ± sessile and few-flowered, the flowers opening in succession
Morphology Reproductive morphology Flowers Corolla
Corolla rotate, campanulate or tubular, glabrous or papillate
Morphology Reproductive morphology Flowers Corona
Corona gynostegial; outer corona annular or cup-shaped or with pouch-like or 2-fid lobes; inner lobes incumbent on the anthers, often exceeding them and connivent in centre, sometimes with a dorsal appendage
Morphology Reproductive morphology Fruits
Follicles terete, rather thin, moderately divergent
Morphology Reproductive morphology Seeds
Seeds with tuft of hairs at one end.
Distribution
Genus of about 60 species extending from South Africa, Namibia and Angola through central, east and north-east Africa to tropical Arabia and along the Sahel belt to extra-tropical Morocco.

[FTEA]

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

Morphology General Habit
Decumbent to prostrate, often clump-forming stem-succulents.
Morphology General Exudate
Latex clear or at most cloudy.
Morphology Stem
Tubercles in 4 or 4–5 rows, abscission zone with leaves not always visible Stems cylindrical, conical or club-shaped, roundly 4-angled to irregularly 4–5-angled, glabrous, occasionally rhizomatous.
Morphology Leaves
Leaf rudiments sessile, triangular-deltate to conical-subulate, acute, ± caducous; stipules, if present, pointed, ovoid or globoid, glandular
Morphology Reproductive morphology Inflorescences
Inflorescences lateral, with 1–40 flowers developing in succession on short peduncles
Morphology Reproductive morphology Flowers
Flowers mostly with scent of faeces Guide rails normally vertical, basally widened
Morphology Reproductive morphology Flowers Corolla
Corolla rotate to campanulate, fused to half of length, occasionally with a central annulus (corolline corona), adaxially usually warty or rugose, glabrous, papillate or with hairs; corolla lobes lanceolate, ovate or triangular, spreading to reflexed
Morphology Reproductive morphology Flowers Corona
Gynostegial corona in 2 series: “outer” corona of 5 staminal and 5 interstaminal parts fused just basally to nearly completely to form a rotate or cyathiform structure; free interstaminal corona lobes deltoid-trianguloid, saccate, lingulate or bilobed; “inner” staminal corona lobes subulate, lingulate, ovoid, trianguloid or clavate, occasionally with hump
Morphology Reproductive morphology Flowers Gynostegium
Gynostegium sub-sessile or atop a column
Morphology Reproductive morphology Fruits
Mericarps two, obclavate-fusiform.
Morphology Reproductive morphology Seeds
Seed ovate, brownish, broadly winged
Note
Pachycymbium and Angolluma in the sense of Gilbert in Bradleya 8: 1–32 (1990) and Plowes in Excelsa 16: 103–123 (1994), respectively, have been shown to be nested within Orbea and are therefore no longer accepted as separate genera (cf. Meve & Liede in Pl. Syst. Evol. 234: Nearly 60 species in Africa and Arabia. Pachycymbium laticoronum (= Orbea laticorona) occurs in northern Kenya; this was based on a Bally specimen, which I have not seen. 171–209, 2002; Bruyns in Syst. Bot. Monogr. 63: 1–196, 2002).

Native to:

Algeria, Angola, Botswana, Burkina, Burundi, Cape Provinces, Caprivi Strip, Djibouti, Eritrea, Ethiopia, Free State, Kenya, KwaZulu-Natal, Malawi, Mali, Mauritania, Morocco, Mozambique, Namibia, Niger, Northern Provinces, Oman, Rwanda, Saudi Arabia, Senegal, Somalia, Sudan, Swaziland, Tanzania, Uganda, Yemen, Zambia, Zaïre, Zimbabwe

Introduced into:

Queensland, South Australia

Orbea Haw. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Bayliss [12014], Kenya 74522.000

First published in Syn. Pl. Succ.: 37 (1812)

Accepted by

  • Albers, F. & Meve, U. (eds.) (2002). Illustrated handbook of succulent plants Asclepiadaceae, corr. 2nd printing: 1-318. Springer, Berlin, Heidelberg,New York.
  • Bruyns, P.V. (2005). Stapeliads of Southern Africa and Madagascar 1-2: 1-606. Umdaus press, Hatfield, South Africa.
  • Goyder, S., Harris, T., Masinde, S., Meve, U. & Venter, J. (2012). Flora of Tropical East Africa, Apocynaceae(2): 1-530.
  • Thulin, M. (ed.) (2006). Flora of Somalia 3: 1-626. The Royal Botanic Gardens, Kew.

Literature

Flora of Somalia

  • Bruyns in Syst. Bot. Monogr. 63 (2002).
  • Flora Somalia, Vol 3, (2006) Author: by J. Lavranos [updated by M. Thulin 2008]
  • Gilbert in Bradleya 8: 20–28 (1990), as Pachycymbium
  • Plowes in Excelsa 16: 103–123 (1994)

Flora of Tropical East Africa

  • Aloe 37: 72–76 (2001)
  • Excelsa Tax. Ser. 1: 1–75 (1978)
  • Syn. Pl. Succ.: 37 (1812)
  • Syst. Bot. Monogr. 63: 1–196 (2002)

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

Herbarium Catalogue Specimens

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

Plants and People Africa
Common Names from Plants and People Africa http://www.plantsandpeopleafrica.com/
© Plants and People Africa http://www.plantsandpeopleafrica.com http://creativecommons.org/licenses/by/3.0/