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This species is accepted, and its native range is NE. & E. Tropical Africa.

[FSOM]

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

Morphology General Habit
Seedlings to 1 m high, with unbranched fleshy stem 4–5-angled, pale green, heavily mottled with darker green; spine-shields forming a continuous horny margin along the angles, with paired spines 3–7 mm long Young plants to 3 m high, with branches at first ascending, then drooping, obtusely 3–4-angled, uniformly greyish green; angles shallowly toothed, with robust widely separated spine-shields to 1 cm long but progressively shorter as more branches are produced, bearing spines to 12 mm long Mature tree 3–6 m high with branches spreading horizontally; secondary branches crowded at the apices, densely rebranching; terminal branchlets cylindrical, spineless but marked with callose leaf-scars 1–3 cm apart immediately below the flowering eyes
Morphology Reproductive morphology Inflorescences
Cymes solitary, 1-forked, with peduncles and cyme-branches 5–7 mm long
Morphology Reproductive morphology Inflorescences Bracts Involucre
Cyathia 9 mm in diam.; glands 4 mm broad, just touching, yellow
Morphology Reproductive morphology Flowers Perianth
Perianth of the female flower with 3 distinct lobes 1.5 mm long; styles 3 mm long, with bifid scarcely thickened apices
Morphology Reproductive morphology Fruits
Capsule exserted on an erect pedicel 1 cm long, deeply and acutely 3-lobed with truncate base and apex, 8 x 20 mm, dark purplish grey
Morphology Reproductive morphology Seeds
Seeds subglobose, c. 4 mm in diam., smooth, pale greyish buff.
Distribution
N1–3; C2; S1–3; E Ethiopia, Kenya, NE Tanzania
Ecology
Altitude range 50–825 m.
Vernacular
Dharkayn, dharkeen (Somali)

[FTEA]

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

Note
Seedlings to ± 1 m. high, with unbranched fleshy stem 4(–5)-angled, 3–4 cm. thick, pale green heavily mottled with darker green; angles ± straight, with spine-shields forming a continuous horny margin ± 2 mm. wide; spines 3–7 mm. long, 1.5–2.5 cm. apart. Young plants to ± 3 m., branching and rebranching irregularly; branches at first ascending then drooping, obtusely 3–4-angled, 1–1.5 cm. thick, uniformly greyish green, ± distinctly toothed, with teeth 3–5 cm. apart; spine-shields stout, 2–4 mm. wide, tapering abruptly above and below the spines up to ± 1 cm., becoming progressively shorter as further branches are produced; spines to 12 mm. long; prickles obsolete.
Morphology General Habit
Mature tree 3–10(–13) m. high; trunk simple, to 40 cm. in diameter; bark grey, rough and fissured, with a few pit-scars resulting from fallen branches visible at higher levels; branches to 5 m. long, at first ascending, finally the lower ones spreading horizontally to form a rounded flat-based crown; secondary branches crowded at the apices, densely and irregularly rebranching; terminal branchlets obscurely 3-angled to cylindrical, marked with calloused obtusely triangular leaf-scars ± 2.5 × 2.5 mm. and 1–3 cm. apart immediately below the flowering eyes, rarely with a pair of minute spines on lower branches.
Morphology Leaves
Leaves deltoid, ± 5 × 3 mm.
Morphology Reproductive morphology Inflorescences
Cymes solitary, 1-forked with peduncles to 5 mm. long and cyme-branches to 7 mm. long; bracts rounded, ± 4 × 5 mm.
Morphology Reproductive morphology Inflorescences Cyathia
Cyathia ± 4 × 9 mm., with funnel-shaped involucres, reddish brown; glands transversely oblong, ± 2 × 4 mm., yellow, just touching; lobes transversely elliptic, ± 1.5 × 2 mm., red.
Morphology Reproductive morphology Flowers
Male flowers:bracteoles spathulate, plumose; stamens 5 mm. long. Female flower:perianth with 3 distinct lobes, 1.5 mm. long; styles 3 mm. long, free to the base, apices slightly thickened, bifid.
sex Male
Male flowers:bracteoles spathulate, plumose; stamens 5 mm. long.
sex Female
Female flower:perianth with 3 distinct lobes, 1.5 mm. long; styles 3 mm. long, free to the base, apices slightly thickened, bifid.
Morphology Reproductive morphology Fruits
Capsule exserted on an erect pedicel to 1 cm. long, deeply and acutely 3-lobed with truncate base, ± 8 × 20 mm., dark purplish grey.
Morphology Reproductive morphology Seeds
Seeds subglobose, 3.5–4 mm. in diameter, pale greyish buff, smooth.
Figures
Fig. 93/1–3.
Habitat
On red sandy soils with fairly open Acacia-Commiphora bushland; 30–1200 m.
Distribution
K1 K2 K4 K6 K7 T3

Doubtfully present in:

Djibouti

Native to:

Ethiopia, Kenya, Somalia, Tanzania

Euphorbia robecchii Pax appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Greenway, P.J. [6596], Tanzania 2118.000
Kenya 21969.015
Bally, P.R.O. [E.15], Kenya 22725.000
Carter, S. [805], Somalia 42948.000
Kenya 49739.000

First published in Annuario Reale Ist. Bot. Roma 6: 186 (1897)

Accepted by

  • Carter, S. (2008). Euphorbia in Tanzania Euphorbia World 4(2): 5-9.
  • 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

Flora of Somalia

  • Flora Somalia, Vol 1, (1993) Author: by S. Carter [updated by M. Thulin 2008]

Flora of Tropical East Africa

  • Bally in Cact. & Succ. Journ. Am. 38: 6 (1966).
  • Cufod., Enumeratio Plantarum Aethiopiae Spermatophyta (Supplement in Bull. Jard. Bot. Brux.) p. 456 (1958).
  • Dale & Greenway, Kenya Trees and Shrubs p. 201 (1961).
  • N.E. Br. in Flora of Tropical Africa 6(1): 583 (1912).
  • Pax in Ann. Ist. Bot. Roma 6: 186 (1897).

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