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

[FZ]

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

Morphology General Habit
Spiny succulent dwarf tuberous-rooted perennial, 1–several-stemmed, often rhizomatous.
Morphology Branches
Branches produced at ground level, simple or sometimes rebranched at the base, seldom above, erect to spreading, 2–4(5)-angled, to 20 cm long or more, 5–9 mm in diameter, distinctly longitudinally whitish-striped between the angles; angles with prominent tubercles 3–5 mm high and 1–3 cm apart along the margins, crowned by the spine shields.
Morphology General Spines
Spine shields obovate, decurrent to 1 cm; spines 2–9 mm long, needle-like; prickles minute or absent.
Morphology Leaves
Leaves 8–15 × 3.5 mm, lanceolate, caducous.
Morphology Reproductive morphology Inflorescences
Cymes shortly pedunculate, several times forked with cyme branches to 4 mm long, or cyathia solitary; bracts c. 1.25 × 1 mm, ovate, apiculate.
Morphology Reproductive morphology Inflorescences Cyathia
Cyathia with cup-shaped involucres, 2.5 × 3.5–5 mm; glands transversely oblong, 1.5–2.25 mm wide, touching, greenish.
sex Male
Male flowers: bracteoles c. 2.5 mm long, fimbriate; stamens c. 4 mm long.
Morphology Reproductive morphology Flowers
Female flower: styles 1.75 mm long, united to halfway, with spreading thickened, shortly bifid apices. Male flowers: bracteoles c. 2.5 mm long, fimbriate; stamens c. 4 mm long.
sex Female
Female flower: styles 1.75 mm long, united to halfway, with spreading thickened, shortly bifid apices.
Morphology Reproductive morphology Fruits
Capsule obtusely lobed, truncate, 4.5 × 6–7 mm, far exserted on a recurved pedicel c. 1 cm long.
Morphology Reproductive morphology Seeds
Seeds subglobose, c. 3 mm in diameter, smooth, brown.

Native to:

KwaZulu-Natal, Mozambique, Northern Provinces, Swaziland

Euphorbia knuthii Pax appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Schlechter [11949], Mozambique K000253120 lectotype
Schlechter [11949], Mozambique K000253121

First published in Bot. Jahrb. Syst. 34: 83 (1904)

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.

Flora Zambesiaca
Flora Zambesiaca
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