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

[FZ]

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

Morphology General Habit
A few-stemmed bush or sparingly branched tree 1.5–9 m high, with a smooth but horizontally grooved grey bark; branches semi-succulent, with large prominent closely-set leaf scars.
Morphology Leaves
Leaves sessile, glabrous; stipules glandular, minute, deciduous; lamina to 30 × 3 cm, linear to linear-lanceolate, acuminate at the apex, rounded at the base, entire, midrib prominent on the lower surface, pale green and slightly glaucous.
Morphology Reproductive morphology Inflorescences
Cymes in terminal 3-branched umbels produced on a leafless peduncle to 10(15) cm long, with primary rays to 5(7) cm long, each forking up to 8 times, peduncle, rays and branches minutely puberulous.
Morphology Reproductive morphology Inflorescences Bracts
Bracts sessile, c. 4 × 4 cm when mature, deltoid, apex acuminate to c. 2 cm long, base subcordate, lower surface minutely puberulous at least towards the base, bracts below the umbel larger and longer.
Morphology Reproductive morphology Inflorescences Cyathia
Cyathia on peduncles to 1 cm long, c. 1 × 3 cm, with barrel-shaped involucres, all parts except the upper surface of the glands minutely puberulous; glands 4 spreading, c. 4 × 8 mm, transversely elliptic, outer margin with 6–10 finger-like processes c. 8 mm long, branching several times at the tips and terminating in minute knobs, the glands yellowish-green, with reddish processes; lobes c. 3 × 5 mm, rounded, margin sharply toothed, often with a longer central tooth to 1.5 mm long, densely puberulous on both surfaces.
sex Male
Male flowers: bracteoles many, fan-shaped, deeply divided, feathery at the apices; stamens 14.5 mm long.
Morphology Reproductive morphology Flowers
Female flower: perianth obvious below the ovary, irregularly and acutely lobed with lobes to 1.5 mm long; ovary minutely puberulous; styles 1 cm long, joined to nearly halfway, with shortly bifid thickened rugulose apices. Male flowers: bracteoles many, fan-shaped, deeply divided, feathery at the apices; stamens 14.5 mm long.
sex Female
Female flower: perianth obvious below the ovary, irregularly and acutely lobed with lobes to 1.5 mm long; ovary minutely puberulous; styles 1 cm long, joined to nearly halfway, with shortly bifid thickened rugulose apices.
Morphology Reproductive morphology Fruits
Fruit exserted on a curved pedicel to 1.5 cm long; capsule c. 13 × 17 mm, subglobose, glabrous when mature, tinged purplish.
Morphology Reproductive morphology Seeds
Seeds c. 6 × 5 mm, subglobose, slightly compressed laterally and obscurely 3-angled, surface minutely roughened, greyish-brown.

[FTEA]

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

Morphology General Habit
A few-stemmed bush or sparingly branched tree 1.5–9 m. high, with a smooth but horizontally grooved grey bark; branches semi-succulent, with large prominent closely-set leaf-scars.
Morphology Leaves
Leaves sessile, linear to linear-lanceolate, to 30 × 3 cm., base rounded, apex acuminate, margin entire, midrib prominent on the lower surface, lamina glabrous, pale green and slightly glaucous; stipules glandular, minute, deciduous.
Morphology Reproductive morphology Inflorescences
Cymes in terminal 3-branched umbels usually on a leafless peduncle to 10(–15) cm. long, with primary rays to 5(–7) cm. long, forking up to 8 times, peduncle, rays and branches minutely puberulous; bracts sessile, deltoid, ± 4 × 4 cm. when mature, base subcordate, apex acuminate to ± 2 cm. long, lower surface minutely puberulous at least towards the base; bracts below the umbels larger and longer.
Morphology Reproductive morphology Inflorescences Cyathia
Cyathia on peduncles to 1 cm. long, ± 1 × 3 cm., with barrel-shaped involucres, all parts except the upper surface of the glands minutely puberulous sometimes densely so; glands 4, spreading, transversely elliptic, ± 4 × 8 mm., outer margin lobed, with 6–10 finger-like processes ± 8 mm. long branching several times at the tips and terminating in minute knobs, the glands yellowish green becoming brown or sometimes purple, with red to purple processes having yellow to red tips; involucral lobes rounded, ± 3 × 5 mm., margin sharply toothed often with a longer central tooth to 1.5 mm. long, densely puberulous on both surfaces.
Morphology Reproductive morphology Flowers
Male flowers:bracteoles many, fan-shaped, deeply divided and densely ciliate at the apices; stamens 14.5 mm. long. Female flower:perianth obvious below the ovary, irregularly and acutely lobed with lobes to 1.5 mm. long; ovary minutely puberulous; styles 1 cm. long, joined for 4 mm., with shortly bifid thickened rugulose apices.
sex Male
Male flowers:bracteoles many, fan-shaped, deeply divided and densely ciliate at the apices; stamens 14.5 mm. long.
sex Female
Female flower:perianth obvious below the ovary, irregularly and acutely lobed with lobes to 1.5 mm. long; ovary minutely puberulous; styles 1 cm. long, joined for 4 mm., with shortly bifid thickened rugulose apices.
Morphology Reproductive morphology Fruits
Capsule exserted on a curved pedicel to 1.5 cm. long, subglobose, ± 13 × 17 mm., glabrous when mature, tinged purplish.
Morphology Reproductive morphology Seeds
Seed subglobose, slightly compressed laterally and obscurely 3-angled, ± 6 × 5 mm., greyish brown, with minutely roughened surface.
Figures
Fig. 85/1, 2, p. 458.
Habitat
On red sandy gritty soil often among rocks on hillsides, in open woodland; 800–1600 m.
Distribution
T1 T2 T4 T5 T6 T7 U2 U3 U4

Native to:

Burundi, Rwanda, Tanzania, Uganda, Zambia, Zaïre

Euphorbia grantii Oliv. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Bally [7861], Tanzania 47395.000
Richards, H.M. [12511], Zambia 5220.000
Richards, H.M. [25312], Tanzania 7463.000
Tanner, R. [536], Tanzania 8131.000
Bullock, A.A. [3921], Tanzania 8132.000
Speke [s.n.], Tanzania K000252978 Unknown type material

First published in Trans. Linn. Soc. London 29: 144 (1875)

Accepted by

  • 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

Flora of Tropical East Africa

  • J.P.M. Brenan, Check-lists of the Forest Trees and Shrubs of the British Empire no. 5, part II, Tanganyika Territory p. 210 (1949).
  • N.E. Br. in Flora of Tropical Africa 6(1): 527 (1911), excl. Hildebrandt 2632.
  • Oliv. in Trans. Linn. Soc., Bot. 29: 144 (1875).
  • W.J. Eggeling, Indigenous Trees of the Uganda Protectorate, ed. 2: 127 (1952).

Flora Zambesiaca
Flora Zambesiaca
http://creativecommons.org/licenses/by-nc-sa/3.0

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