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This species is accepted, and its native range is Tanzania to S. Africa.
Euphorbia cooperi

[FTEA]

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

Morphology General Habit
Tree to 9(–12) m. high, or occasionally a shrub to ± 2 m. high; trunk simple, to 35 cm. thick, bark greyish brown, rough and fissured, with whorls of 4–9 pit-scars resulting from fallen branches; branches curving upwards, to 2.5 m. long, occasionally rebranching to form a rounded, flat-topped crown, fleshy, (3–)4–6(–8)-angled, 5–20 cm. wide, distinctly winged, deeply constricted at ± regular intervals into pear-shaped to subcircular segments 10–50 cm. long; angles shallowly sinuately toothed, with teeth ± regularly spaced 5–25 mm. apart.
Morphology General Spines
Spine-shields contiguous to form a horny margin 3–10 mm. wide, becoming corky on older branches; spines 3–10 mm. long, or occasionally to 30 mm. on the lower branches; prickles vestigial or absent.
Morphology Leaves
Leaves deltoid, ± 1.5 × 1.5 mm.
Morphology Reproductive morphology Inflorescences
Cymes 1–3 in a horizontal row, 1-forked, subsessile; bracts rounded, ± 4.5 × 6.5 mm.
Morphology Reproductive morphology Inflorescences Cyathia
Cyathia ± 4.5 × 8 mm., with cup-shaped involucres; glands transversely oblong, ± 1.5 × 4 mm., just touching, golden yellow; lobes subquadrate, ± 1.5 × 2 mm.
sex Male
Male flowers:bracteoles very deeply laciniate, plumose; stamens 6.8 mm. long.
Morphology Reproductive morphology Flowers
Female flower:perianth obvious, shallowly lobed; styles 2–5.5 mm. long, joined for 1/2–2/3, apices thickened, rugulose, ± bifid. Male flowers:bracteoles very deeply laciniate, plumose; stamens 6.8 mm. long.
sex Female
Female flower:perianth obvious, shallowly lobed; styles 2–5.5 mm. long, joined for 1/2–2/3, apices thickened, rugulose, ± bifid.
Morphology Reproductive morphology Fruits
Capsule exserted on a stout pedicel 4–10 mm. long, distinctly 3-lobed, with truncate base, 6–7.5 × 10–13.5 mm.
Morphology Reproductive morphology Seeds
Seeds subglobose, 2.8–3.5 mm. in diameter, pale greyish brown, speckled, smooth.

[FZ]

Euphorbiaceae, S. Carter & L.C. Leach. Flora Zambesiaca 9:5. 2001

Morphology General Habit
Flat-topped candelabriform succulent tree, 2–6(9) m high, shrub-like to c. 2 m high in younger plants; trunk stout cylindric, scarred from fallen branches; branches arcuate-ascending, shortly exceeding the trunk apex, usually simple or occasionally branched near the apices, deeply and variably segmented; segments 10–50 × 5–20 cm, (2)3–7(8)-winged; the angles shallowly sinuate-undulate, with tubercles 8–25 mm apart along the margins.
Morphology General Spines
Spine shields joined to form a continuous horny margin to the wings; spines to 10 mm long; prickles vestigial.
Morphology Leaves
Leaves c. 1.5 × 1.5 mm, deltate.
Morphology Reproductive morphology Inflorescences
Cymes 1–3, horizontally arranged, with cyathia vertically arranged, subsessile.
Morphology Reproductive morphology Inflorescences Cyathia
Cyathia c. 4.5 × 8 mm, with cup-shaped involucres; glands c. 1.5 × 4 mm, transversely oblong, touching, golden-yellow; lobes c. 1.5 × 2 mm, subquadrate.
sex Male
Male flowers: bracteoles deeply laciniate, plumose.
Morphology Reproductive morphology Flowers
Female flower: perianth shallowly lobed; styles variable, from c. 2 mm and free almost to the base, to 5.5 mm and united for two-thirds, apices bifid. Male flowers: bracteoles deeply laciniate, plumose.
sex Female
Female flower: perianth shallowly lobed; styles variable, from c. 2 mm and free almost to the base, to 5.5 mm and united for two-thirds, apices bifid.
Morphology Reproductive morphology Fruits
Capsule variable in size and degree of lobing, 6–10 × 10–13.5 mm; pedicel stout, 4–10 mm long.
Morphology Reproductive morphology Seeds
Seeds 2.8–3.5 mm in diameter, subglobose, pale greyish-brown, speckled, smooth.

Native to:

Botswana, KwaZulu-Natal, Malawi, Mozambique, Northern Provinces, Swaziland, Tanzania, Zambia, Zimbabwe

Euphorbia cooperi N.E.Br. ex A.Berger appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Mitchell, B.L., Zambia 22768.000
Eyles, F. [7950], Zimbabwe 2601.000
Wild, H. [28202], Zimbabwe 4085.000
Cooper, T. [s.n.], South Africa K000253382 Unknown type material
Cooper, T. [s.n.], South Africa K000253381 Unknown type material

First published in Sukkul. Euphorb.: 83 (1907 publ. 1906)

Accepted by

  • Bruyns, P.V. (2012). Nomenclature and typification of southern African species of Euphorbia Bothalia 42: 217-245.
  • Calane da Silva, M., Izdine, S. & Amuse, A.B. (2004). A Preliminary Checklist of the Vascular Plants of Mozambique: 1-184. SABONET, Pretoria.
  • 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 Tropical East Africa

  • Berger, Sukk. Euph.: 83 (1907).
  • N.E. Br. in Fl. Cap. 5(2): 368 (1915).

Flora Zambesiaca
Flora Zambesiaca
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Flora of Tropical East Africa
Flora of Tropical East Africa
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Herbarium Catalogue Specimens
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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

Kew Science Photographs
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