Skip to main content
This species is accepted, and its native range is Kenya to Malawi.
A specimen from Kew's Herbarium

[FTEA]

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

Morphology General Habit
Glabrous shrub to 4.5 m. high, with long thin often subpendent branches, rebranching mostly dichotomously.
Morphology Leaves
Leaves subsessile or shortly petiolate, oblanceolate or obovate, to 12 × 3 cm., base cuneate tapering gradually to the base of the petiole, apex acute and markedly apiculate, margin entire, dark green and slightly fleshy.
Morphology Reproductive morphology Inflorescences
Cymes in terminal 3–5-branched umbels, with (primary) rays to 3 cm. long, sometimes forking once only; bracts subcircular, 6–10 mm. long, apex obtuse to rounded, markedly apiculate.
Morphology Reproductive morphology Inflorescences Cyathia
Central cyathium of the umbel on a peduncle to 2 mm. long, the rest sessile to subsessile, 3 × 8 mm., with cup-shaped involucres; glands 4, or 5 on cyathia developing only ♂ flowers (usually the central one), subcircular to transversely elliptic, 1.5–2.5 mm. broad, outer margin rounded and entire to truncate and shallowly crenulate; involucral lobes subquadrate, 1.2 mm. long, apex deeply 2-lobed, lower margins shortly ciliate.
Morphology Reproductive morphology Flowers
Male flowers:bracteoles fan-shaped, deeply divided, feathery; stamens 4 mm. long. Female:styles 2.5 mm. long, joined at the base, with spreading very distinctly bifid slightly thickened apices.
sex Male
Male flowers:bracteoles fan-shaped, deeply divided, feathery; stamens 4 mm. long.
sex Female
Female:styles 2.5 mm. long, joined at the base, with spreading very distinctly bifid slightly thickened apices.
Morphology Reproductive morphology Fruits
Capsule exserted on a pedicel 6(–10) mm. long, deeply 3-lobed, 6 × 8 mm.
Morphology Reproductive morphology Seeds
Seeds ovoid, 3.4 × 3 mm., grey, surface lightly ridged and wrinkled; caruncle 0.7 mm. across, cream.

Native to:

Kenya, Malawi, Tanzania

Euphorbia usambarica Pax appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Drummond, R.B. [2908], Tanzania K000453302
Iversen, S.T. [87438], Tanzania K000453306
Gereau, R.E. [3021], Tanzania K000453307
Greenway, P.J. [7930], Tanzania K000453303
Procter, J.E.A. [213], Tanzania K000453304
Rounce, N.V. [573], Tanzania K000453308

First published in Bot. Jahrb. Syst. 19: 122 (1894)

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

  • Dale & Greenway, Kenya Trees and Shrubs p. 202 (1961).
  • J.P.M. Brenan, Check-lists of the Forest Trees and Shrubs of the British Empire no. 5, part II, Tanganyika Territory p. 212 (1949).
  • N.E. Br. in Flora of Tropical Africa 6(1): 538 (1911).
  • Pax in A. Engler, Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 19: 122 (1894).

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