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This species is accepted, and its native range is Tanzania to Mozambique.
A specimen from Kew's Herbarium

[FTEA]

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

Morphology General Habit
Very sparsely branched erect to subscandent succulent perennial to 3.5 m. high, or sometimes with the stem apex damaged producing a more densely branched habit to ± 1 m. high; stem and branches 4-angled, stem to 5 cm. thick near the base, branches 1–2 cm. thick, pale greyish green mottled with darker bluish green especially along the angles; angles straight to shallowly toothed, with teeth 1–3 cm. apart.
Morphology General Spines
Spinescence greyish buff; spine-shields elongated, ± 3 × 2 mm. above the spines, decurrent to just above the flowering eye below, eventually forming a continuous horny margin; spines 5–8(–10) mm. long; prickles 1–2 mm. long.
Morphology Leaves
Leaves ovate, ± 7 × 2.5 mm.
Morphology Reproductive morphology Inflorescences
Cymes solitary, 1-forked, subsessile, but cyme-branches to 4 mm. long; bracts broadly deltoid, ± 2.5 × 2 mm.
Morphology Reproductive morphology Inflorescences Cyathia
Cyathia ± 3 × 9 mm., with broadly funnel-shaped involucres; glands transversely rectangular, ± 2 × 4.5 mm., contiguous, yellow-green and granular, with a distinct smooth red margin 1 mm. wide; lobes transversely elliptic, ± 1.7 × 3 mm.
Morphology Reproductive morphology Flowers
Male flowers:bracteoles spathulate, dentate; stamens 4.5 mm. long. Female flower:styles 3 mm. long, joined for 0.7 mm., apices thickened.
sex Male
Male flowers:bracteoles spathulate, dentate; stamens 4.5 mm. long.
sex Female
Female flower:styles 3 mm. long, joined for 0.7 mm., apices thickened.
Morphology Reproductive morphology Fruits
Capsule subsessile, obtusely 3-lobed, ± 5 × 7 mm.
Morphology Reproductive morphology Seeds
Seeds subglobose, 2.2 mm. in diameter, greyish brown, shallowly tuberculate.
Figures
Fig.95/1–3.
Habitat
In sandy rocky soils with dry grass and deciduous woodland; 500–1720 m.
Distribution
T1 T4 T5 T6 T7 not known elsewhere

Native to:

Mozambique, Tanzania

Euphorbia quadrangularis Pax appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Aug 11, 1981 Ruffo, C.K. [1435], Tanzania K000452902
Jan 1, 1961 Verdcourt, B. [2899S], Tanzania K000452900
Nov 1, 1959 Bally, P.R.O. [11606], Tanzania K000452901
Hornby, R.M. [2991a], Tanzania 15809.000
Bally, P.R.O. [11606], Tanzania 17434.000
Silcock, R. [E.240], Tanzania 2094.000
Greenway, P.J. [6607], Tanzania 2095.000
Harris, V. [Bally E.239], Tanzania 2623.000
Leach, L.C. [10135], Tanzania 26332.035
Leach, L.C. [10135A], Tanzania 35427.000
Fortie, M. [Bally E. 132], Tanzania 5243.000
Carter [2366], Tanzania 55466.000
Richards, H.M. [13507], Tanzania K000452904
Koritschoner, H. [1729], Tanzania K000452899
Bidgood, S.C. [4378], Tanzania K000452903
Greenway, P.J. [2484], Tanzania K000452906
Balslev, H. [374], Tanzania K000452910
Leach, L.C. [10135], Tanzania K000453297
Burtt, B.D. [3510], Tanzania K000452905
Greenway, P.J. [6607], Tanzania K000452909
Hornby [914], Tanzania K000452908
Bally, P.R.O. [E240], Tanzania K000452907

First published in Bot. Jahrb. Syst. 19: 119 (1894)

Accepted by

  • Calane da Silva, M., Izdine, S. & Amuse, A.B. (2004). A Preliminary Checklist of the Vascular Plants of Mozambique: 1-184. SABONET, Pretoria.
  • 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

Kew Backbone Distributions

  • Calane da Silva, M., Izdine, S. & Amuse, A.B. (2004). A Preliminary Checklist of the Vascular Plants of Mozambique: 1-184. SABONET, Pretoria.
  • Carter, S. (2008). Euphorbia in Tanzania Euphorbia World 4(2): 5-9.

Flora of Tropical East Africa

  • Cribb & Leedal, Mount. Fl. S. Tanz.: 77 (1982).
  • 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): 574 (1911).
  • Pax in A. Engler, Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie: 119 (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