Abstract
Bisexual, geophytic herbs or spineless succulent shrubs with slender cylindrical branches. Leaves alternate, ovate to lanceolate, fleeting in succulents, not arising on raised tubercles, estipulate. Synflorescences terminal and ± sessile on branches surrounded by whorl of bracts in whose axils rays terminated by a further cyathium develop forming umbel (sometimes further rays developing around these cyathia), bracts often differently shaped from leaves. Cyathia bisexual or unisexual (then males larger than females and with more glands); glands 4–8 (10), elliptic and flat with entire margins or crescent-shaped with two lateral horns on outer margins, without petaloid appendages; male florets with glabrous or pubescent pedicels. Capsule obtusely 3-lobed, smooth, glabrous, 3–8 mm diam., exserted, dehiscing explosively. Seeds 3 per capsule, ellipsoidal to oblong, smooth to slightly rugulose, carunculate.
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References
Bergius, P. J. (1767). Descriptiones Plantarum ex Capite Bonae Spei. Stockholm: Laurentius Salvius.
Brown, N. E. (1915). Euphorbia. In W. T. Thiselton-Dyer (Ed.), Flora Capensis 5 (2): 222–375. London: L. Reeve & Co.
Bruyns, P. V. (2012). Nomenclature and typification of southern African species of Euphorbia. Bothalia, 42, 217–245.
Burman, J. (1738–9). Rariorum Africanarum Plantarum. Amsterdam: Boussière.
Compton, R. H. (1929). The vegetation of the Karoo. Journal of the Botanical Society of South Africa, 15, 13–21.
Compton, R. H. (1931). The Flora of the Whitehill district. Transactions of the Royal Society of South Africa, 19, 269–329.
Compton, R. H. (1976). The Flora of Swaziland (Journal of South African Botany, Supplementary Volume 11). Kirstenbosch: Trustees of National Botanc Gardens.
Croizat, L. (1945). “Euphorbia Esula” in North America. American Midland Naturalist, 33, 231–243.
Dillenius, J. J. (1732). Hortus elthamensis 2. London.
Gunn, M., & Codd, L. E. (1981). Botanical exploration of Southern Africa. Cape Town: A.A. Balkema.
Hargreaves, B. J. (1992c). The other spurges of Lesotho (at least allegedly). Euphorbia Journal, 8, 126–132.
Kunkel, G. (1978). Flora de Gran Canaria 3. Las plantas suculentas. Barcelona: Seix y Barral Hnos.
Lamarck, J.-B. (1786). Encyclopédie Méthodique. Botanique 2. Paris/Liege: Panckoucke/Plomteux.
Leach, L. C. (1975a). Notes on Euphorbia mauritanica, E. gossypina and some related species with an amplified description of E. berotica. Bothalia, 11, 505–510.
Macnae, M. M., & Davidson, L. E. (1969). The volume “Icones Plantarum et Animalium” in the Africana Museum, Johannesburg, and its relationship to the Codex Witsenii quoted by Jan Burman in his “Decades Rariorum Africanarum Plantarum”. Journal of South African Botany, 35, 65–81.
Petiver, J. (1709–11). Catalogus Classicus & Topicus Omnium Rerum Figuratum in V. Decadibus, Seu primo [-secundo] volumine Gazophylacii Naturae & Artis. London: C. Bateman.
Poiret, J. L. M. (1812). Encyclopédie Méthodique, Botanique (Lamarck), Supplément, 2 (2). Paris: H. Agasse.
Riina, R., Peirson, J. A., Geltman, D. V., Molero, J., Frajman, B., Pahlevani, A., Barres, L., Morawetz, J. J., Salmaki, Y., Zarre, S., Kryukov, A., Bruyns, P. V., & Berry, P. E. (2013). A worldwide molecular phylogeny and classification of the leafy spurges, Euphorbia subgenus Esula (Euphorbiaceae). Taxon, 62, 316–342.
Thunberg, C. P. (1800). Prodomus Plantarum Capensium 2. Uppsala: J.F. Edman.
White, A. C., Dyer, R. A., & Sloane, B. L. (1941). The Succulent Euphorbieae (Southern Africa). Pasadena: Abbey Garden Press.
Wijnands, D. O. (1983). The botany of the Commelins. Rotterdam: A.A.Balkema.
Wilson, M. L., Toussant van Hove-Exalto, T., & van Rijssen, W. J. J. (Eds.). (2002). Codex Witsenii. Cape Town/Amsterdam: Iziko Museums of Cape Town/Davidii Media.
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Bruyns, P.V. (2022). Euphorbia subg. Esula. In: Euphorbia in Southern Africa. Springer, Cham. https://doi.org/10.1007/978-3-030-49399-8_2
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