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This species is accepted, and its native range is Kenya to Tanzania.

[FTEA]

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

Morphology General Habit
Tree to 10(–15) m. high, with a trunk to ± 30 cm. thick and grey fissured bark marked with usually 6 vertical rows of persistent spines and pit-scars resulting from fallen branches; seedlings 3–4-angled; branches spreading to 3(–5) m., rebranching several times to form a rounded crown; terminal branchlets fleshy, 3–4-angled, to 15 cm. wide, deeply winged and deeply constricted into ovate to subcircular segments to 15 cm. long or more, elongated with undulate margins on young plants; angles sinuately toothed with teeth 1–3 cm. apart.
Morphology General Spines
Spine-shields forming a continuous horny margin 1.5–8 mm. wide; spines robust, 0.5–2 cm. long or to 3.5 cm. on young plants; prickles to 1 mm. long; flowering eye usually flanked by a pair of secondary spines to 2 mm. long.
Morphology Leaves
Leaves ovate, ± 2 × 2 mm.
Morphology Reproductive morphology Inflorescences
Cymes 3–8 crowded together, 1-forked, with stout peduncles and cyme-branches 3–8 mm. long; bracts rounded, ± 3.5 × 6 mm.
Morphology Reproductive morphology Inflorescences Cyathia
Cyathia 4–4.5 × 8–10 mm., with cup-shaped involucres; glands transversely oblong, ± 2 × 4.5 mm., just touching, golden yellow; lobes subquadrate, ± 1.5 × 1.5–2 mm.
Morphology Reproductive morphology Flowers
Male flowers:bracteoles spathulate, laciniate; stamens 5.5 mm. long. Female flower:perianth 3-lobed, with lobes 2–3 mm. long; styles 3.5 mm. long, joined for 1/3 at the base, apices thickened, rugose, ± bifid.
sex Male
Male flowers:bracteoles spathulate, laciniate; stamens 5.5 mm. long.
sex Female
Female flower:perianth 3-lobed, with lobes 2–3 mm. long; styles 3.5 mm. long, joined for 1/3 at the base, apices thickened, rugose, ± bifid.
Morphology Reproductive morphology Fruits
Capsule exserted on a pedicel to 6 mm. long, deeply 3-lobed, ± 9 × 19 mm., base and apex truncate.
Morphology Reproductive morphology Seeds
Seeds subglobose 3.5–4.2 mm. in diameter, buff with dark brown speckles, smooth.

Native to:

Kenya, Tanzania

Euphorbia bussei Pax appears in other Kew resources:

First published in Bot. Jahrb. Syst. 33: 286 (1903)

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

Flora of Tropical East Africa

  • Pax in A. Engler, Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 33: 286 (1903).
  • S. Carter in Kew Bulletin 42: 677 (1987).

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