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This species is accepted, and its native range is Ethiopia to Kenya, S. Arabian Peninsula.
A specimen from Kew's Herbarium

[FSOM]

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

Morphology General Habit
Glabrous perennial to 30 cm high, with a thick tap-root merging into a swollen succulent tuberculate stem to 8 cm high and 4 cm thick, the tubercles usually coloured purple
Morphology Branches
Branches radiating from the apex, succulent, tuberculate or smooth, to 1 cm thick
Morphology Leaves
Leaves linear-lanceolate, 2–5 x 0.3–1 cm; petiole 5–10 mm long; stipules filamentous, deciduous
Morphology Reproductive morphology Inflorescences
Cymes clustered 2–6 at the branch apices on peduncles 3–6 cm long, forking several times, often trichotomously, with rays 1–4 cm long; bracts similar to the leaves but smaller, the upper ones ovate
Morphology Reproductive morphology Inflorescences Bracts Involucre
Cyathia 2.5 mm in diam.; glands 2, the outer margin crenulate, the lateral margins curled inwards and joined at the base to form an erect tube 2.5 mm long and slightly longer than the deeply toothed lobes
Morphology Reproductive morphology Flowers Gynoecium Style
Styles 2.7 mm long, joined almost to the minutely bifid apices
Morphology Reproductive morphology Fruits
Capsule exserted on a pedicel 5–9 mm long, deeply 3-lobed, 4.5 x 6 mm
Morphology Reproductive morphology Seeds
Seeds conical with acute apex, obtusely 4-angled with 2 shallow horizontal constrictions, 3 x 2.5 mm, surface roughened, brown.
Distribution
N1–3; C2; S1; S Yemen, Ethiopia, NE Kenya
Ecology
Altitude range 150–1140 m.
Vernacular
Agadin, bacaroor (Somali)

[FTEA]

Euphorbiaceae, A. R.-Smith. Flora of Tropical East Africa. 1987

Morphology General Habit
Glabrous perennial herb to 30 cm. high, with a thick tap-root merging into a swollen ± succulent tuberculate or occasionally smooth stem to 8 cm. high and 4 cm. thick; branches radiating from the stem apex to 8 cm. long, tuberculate or smooth and ± succulent, sometimes with further thinner branches at the apices in groups of 3–6.
Morphology Leaves
Leaves subpetiolate to petiolate from the apices of the tubercles, linear-lanceolate to 50 × 8 mm., base cuneate, apex acute and minutely apiculate, margin entire; petiole to 1 cm. long; glandular stipules minutely filamentous and apparent only on young growth.
Morphology Reproductive morphology Inflorescences
Cymes clustered 2–6 at the apices of the branches, with primary rays to 6 cm. long, forking up to 5 times often trichotomously, semi-persistent; bracts sessile, the uppermost ovate ± 10 × 5 mm., base rounded, apex acute, the lower ones progressively larger and more similar to the leaves.
Morphology Reproductive morphology Inflorescences Cyathia
Cyathia on peduncles 1–1.5 mm. long, ± 3 × 2.5 mm., with funnel-shaped involucres; glands 2, subquadrate, ± 2.5 × 2.5 mm., the outer margin shallowly crenulate, the lateral margins curled inwards and joined at the base to form an erect tube; lobes ± 1.8 × 1 mm., the upper margin deeply and finely toothed to almost halfway.
Morphology Reproductive morphology Flowers
Male flowers few:bracteoles ligulate, deeply divided; stamens to 6 mm. long. Female flower:styles ± 2.7 mm. long, joined almost to the minutely bifid tips.
sex Male
Male flowers few:bracteoles ligulate, deeply divided; stamens to 6 mm. long.
sex Female
Female flower:styles ± 2.7 mm. long, joined almost to the minutely bifid tips.
Morphology Reproductive morphology Fruits
Capsule exserted on a pedicel to 9 mm. long, deeply 3-lobed with truncate base, ± 4.5 × 6 mm.
Morphology Reproductive morphology Seeds
Seeds obtusely trigonous-conical with truncate base, acute apex and 2 shallow horizontal constrictions, ± 3 × 2.5 mm., black to greyish brown with a speckled roughened surface.
Habitat
In bare sandy rocky soils usually near watercourses; 300 m.
Distribution
K1

Native to:

Djibouti, Ethiopia, Kenya, Oman, Somalia, Yemen

Euphorbia longetuberculosa Hochst. ex Boiss. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Bally [9342], Somalia 47388.000
Somalia 51980.000
Schimper, W. [2307], Ethiopia K000252855

First published in A.P.de Candolle, Prodr. 15(2): 85 (1862)

Accepted by

  • Govaerts, R., Frodin, D.G. & Radcliffe-Smith, A. (2000). World Checklist and Bibliography of Euphorbiaceae (and Pandaceae) 1-4: 1-1622. The Board of Trustees of the Royal Botanic Gardens, Kew.

Literature

Kew Backbone Distributions

  • Audru, J., Cesar, J. & Lebrun, J.-P. (1994). Les Plantes Vasculaires de la République de Djibouti. Flore Illustrée 1: 1-336. CIRAD, Départerment d'Elevage et de Médecine vétérinaire, Djibouti.

Flora of Somalia

  • Carter in Kew Bull. 40: 810 (1985).
  • Flora Somalia, Vol 1, (1993) Author: by S. Carter [updated by M. Thulin 2008]

Flora of Tropical East Africa

  • Boiss. in DC., Prodr. 15(2): 85 (1862).
  • Cufod., Enumeratio Plantarum Aethiopiae Spermatophyta (Supplement in Bull. Jard. Bot. Brux.) p. 451 (1958).
  • N.E. Br. in Flora of Tropical Africa 6(1): 558 (1911).
  • S. Carter in Kew Bulletin 40: 810 (1985).

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
Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/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