Abstract
A new species of Aloe, A. uigensis (Asphodelaceae subfam. Alooideae), is described from northwestern Angola. It is a non-proliferous, single-stemmed species that bears narrowly elongated, acuminate racemes with orange to pale reddish flowers. Aloe uigensis is compared to some long-known as well as recently described species of Aloe from Angola, but does not have close relatives with which it can be confused in the country.
References
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Figueiredo, E. & Smith, G.F. (2009) The succulent flora of Angola. Haseltonia 15: 69–78. https://doi.org/10.2985/026.015.0107
Figueiredo, E. & Smith, G.F. (2012) Common names of Angolan plants. Inhlaba Books, Pretoria, 262 pp.
Figueiredo, E. & Smith, G.F. (2017) Common names of Angolan plants. 2<sup>nd</sup> edn. Protea Book House, Pretoria, 399 pp.
Figueiredo, E. & Smith, G.F. (2018) (64–65) Requests for binding decisions on the descriptive statements associated with Euphorbia candelabrum Welw. (1855) and E. candelabrum Welw. (1856) (Euphorbiaceae). Taxon 67 (2): 457–458. https://doi.org/10.12705/672.29
Figueiredo, E. & Smith, G.F. (2020) Typification of Euphorbia candelabrum (Euphorbiaceae) and associated names. Phytotaxa 447 (3): 216–220. https://doi.org/10.11646/phytotaxa.447.3.8
Figueiredo, E., Smith, G.F. & César, J. (2009) The flora of Angola: a first record of diversity and endemism. Taxon 58 (1): 233–236. https://doi.org/10.1002/tax.581022
Hiern, W.P. (1877) LXIX. Araliaceæ. 3. Cussonia, Thunb.; Benth. et Hook. f. Gen. Plant. i. 944. In: Oliver, D. (Ed.) [assisted by other botanists], Flora of Tropical Africa [Umbelliferæ to Ebenaceæ], Vol. III. L. Reeve & Co., Ashford, pp. 31–33. [https://www.biodiversitylibrary.org/item/60249#page/43/mode/1up]
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Klopper, R.R., Smith, G.F. & Matos, S. (2008) Asphodelaceae. Aloe L. In: Figueiredo, E. & Smith,G.F. (Eds.) Plants of Angola / Plantas de Angola. Strelitzia 22. South African National Biodiversity Institute, Pretoria, pp. 174–175.
Klopper, R.R., Matos, S., Figueiredo, E. & Smith, G.F. (2009) Aloe in Angola (Asphodelaceae: Alooideae). Bothalia 39: 19–35.
Klopper, R.R., Matos, S., Figueiredo, E. & Smith, G.F. (2010) A preliminary checklist for the aloes of Angola. In: van der Burgt, X., van der Maesen, J. & Onana, J.-M. (eds.) Systematics and conservation of African plants. Proceedings of the XVIII<sup>th</sup> triannual Congress of the AETFAT, Yaoundé, Cameroon. Kew Publishing, Royal Botanic Gardens, Kew, pp. 37–41.
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McCoy, T.[A.]. (2016) A new species of Aloe from the Republic of Angola [Aloe varimaculata T.A.McCoy]. Cactus and Succulent Journal (U.S.) 88 (6): 277–280. https://doi.org/10.2985/015.088.0603
Newton, L.E. (2020) Aloe. Asphodelaceae. In: U. Eggli & R. Nyffeler (eds.) Illustrated handbook of succulent plants: Monocotyledons, Vol. 1. Springer-Verlag, Berlin, pp. 485–696. https://doi.org/10.1007/978-3-662-56486-8_110
Rendle, A.B. (1917) Urticaceae. 2. Obetia, Gaud.; Benth. et Hook. f. Gen. Pl. iii. 382. In: Prain, D. (ed.) Flora of Tropical Africa [Ulmaceæ to Cycadacæ] VI (sect. 2). Lovell Reeve & Co., Limited, London, pp. 244–245. [https://www.biodiversitylibrary.org/page/378259#page/259/mode/1up]
Reynolds, G.W. (1960) Hunting aloes in Angola. African Wild Life 14: 13–25.
Reynolds, G.W. (1966) The aloes of tropical Africa and Madagascar. The Trustees, The Aloes Book Fund, Mbabane, 537 pp.
Seemann, B. (1865 [1 February]) Welwitschii iter angolense. (Continued from Vol. II. p. 339.) II. Hederaceæ novæ a cl. Dr. Welwitsch in Africa æquinoctiali occidentali lectæ, auctore Dr. B. Seemann. The Journal of Botany, British and Foreign III: 33–34, + Tab. 26 opposite p. 33. [https://www.biodiversitylibrary.org/item/54457#page/39/mode/1up]
Smith, G.F. & Figueiredo, E. (2011a) Provenance of the material on which the name Aloe mendesii Reynolds (Asphodelaceae), a cliff-dwelling species from Angola, is based. Bradleya 29: 61–66. https://doi.org/10.25223/brad.n29.2011.a7
Smith, G.F. & Figueiredo, E. (2011b) Aloe palmiformis, an endemic krantz aloe from Angola. Cactus & Succulent Journal (U.S.) 83: 22–27. https://doi.org/10.2985/0007-9367-83.1.22
Smith, G.F. & Figueiredo, E. (2020) Part VI. The family Asphodelaceae. In: Eggli, U. & Nyffeler, R. (eds.) Illustrated handbook of succulent plants. Monocotyledons. Vol. 1. Families Agavaceae to Asphodelaceae. 2<sup>nd</sup> edn. Springer-Verlag GmbH, part of Springer Nature, Berlin, pp. 475–481. https://doi.org/10.1007/978-3-662-56486-8
Thiers, B. (2021 [continuously updated]) Index herbariorum: a global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium. Available from: http://sweetgum.nybg.org/ih/ (accessed April 2021)
Turland, N.J., Wiersema, J.H., Barrie, F.R., Greuter, W., Hawksworth, D.L., Herendeen, P.S., Knapp, S., Kusber, W.-H., Li, D.-Z., Marhold, K., May, T.W., McNeill, J., Monro, A.M., Prado, J., Price, M.J. & Smith, G.F. (2018) International Code of Nomenclature for algae, fungi, and plants (Shenzhen Code) adopted by the Nineteenth International Botanical Congress Shenzhen, China, July 2017. [Regnum Vegetabile 159: 1–254.] https://doi.org/10.12705/Code.2018
Van Jaarsveld, E.J. (2012) Aloe mocamedensis, a new species from the Namib Desert, southwestern Angola. Bradleya 30: 173–178. https://doi.org/10.25223/brad.n30.2012.a21
Van Wyk, B.-E. & Smith, G.F. (2014) Guide to the aloes of South Africa. 3<sup>rd</sup> edn. Briza Publications, Pretoria, 376 pp.
White, F. (1983) The vegetation of Africa: a descriptive memoir to accompany the UNESCO/AETFAT/UNSO vegetation map of Africa. Natural Resources Research 20. UNESCO, Paris, 356 pp.
Barbosa, L.A.G. (1970) Carta fitogeográfica de Angola. Instituto de Investigação Científica de Angola, Luanda, 323 pp.
Brown, N.E. (1912 [October 1911–March 1912]) 4. Euphorbia, Linn. In: W.T. Thiselton-Dyer (ed.) Flora of Tropical Africa. Nyctagineae to Euphorbiaceae, Vol. 6 (1). Lovell Reeve & Co., Limited, London, pp. 470–603. [https://www.biodiversitylibrary.org/item/129#page/486/mode/1up]
Figueiredo, E. & Smith, G.F. (2008) Plants of Angola / Plantas de Angola. Strelitzia 22. South African National Biodiversity Institute, Pretoria, 282 pp. [https://www.sanbi.org/documents/plants-of-angola-strelitzia-22/]
Figueiredo, E. & Smith, G.F. (2009) The succulent flora of Angola. Haseltonia 15: 69–78. https://doi.org/10.2985/026.015.0107
Figueiredo, E. & Smith, G.F. (2012) Common names of Angolan plants. Inhlaba Books, Pretoria, 262 pp.
Figueiredo, E. & Smith, G.F. (2017) Common names of Angolan plants. 2<sup>nd</sup> edn. Protea Book House, Pretoria, 399 pp.
Figueiredo, E. & Smith, G.F. (2018) (64–65) Requests for binding decisions on the descriptive statements associated with Euphorbia candelabrum Welw. (1855) and E. candelabrum Welw. (1856) (Euphorbiaceae). Taxon 67 (2): 457–458. https://doi.org/10.12705/672.29
Figueiredo, E. & Smith, G.F. (2020) Typification of Euphorbia candelabrum (Euphorbiaceae) and associated names. Phytotaxa 447 (3): 216–220. https://doi.org/10.11646/phytotaxa.447.3.8
Figueiredo, E., Smith, G.F. & César, J. (2009) The flora of Angola: a first record of diversity and endemism. Taxon 58 (1): 233–236. https://doi.org/10.1002/tax.581022
Hiern, W.P. (1877) LXIX. Araliaceæ. 3. Cussonia, Thunb.; Benth. et Hook. f. Gen. Plant. i. 944. In: Oliver, D. (Ed.) [assisted by other botanists], Flora of Tropical Africa [Umbelliferæ to Ebenaceæ], Vol. III. L. Reeve & Co., Ashford, pp. 31–33. [https://www.biodiversitylibrary.org/item/60249#page/43/mode/1up]
Hiern, W.P. (1900) Catalogue of the African plants collected by Dr. Friedrich Welwitsch in 1853–61. Vol. I. Dicotyledons, Part IV. Lentibulariaceæ to Ceratophylleæ. [CXVI. Urticaceæ. 2. Urticastrum Heist.; Fabric. Enum. Hort. Helmst. p. 204 (1759)]. Printed by order of the Trustees of the British Museum, London, pp. 987–988. [https://www.biodiversitylibrary.org/page/11447105#page/209/mode/1up]
IPNI. (2021+) The International Plant Names Index. Available from: https://www.ipni.org/ (continuously updated; accessed April 2021)
Klopper, R.R., Smith, G.F. & Matos, S. (2008) Asphodelaceae. Aloe L. In: Figueiredo, E. & Smith,G.F. (Eds.) Plants of Angola / Plantas de Angola. Strelitzia 22. South African National Biodiversity Institute, Pretoria, pp. 174–175.
Klopper, R.R., Matos, S., Figueiredo, E. & Smith, G.F. (2009) Aloe in Angola (Asphodelaceae: Alooideae). Bothalia 39: 19–35.
Klopper, R.R., Matos, S., Figueiredo, E. & Smith, G.F. (2010) A preliminary checklist for the aloes of Angola. In: van der Burgt, X., van der Maesen, J. & Onana, J.-M. (eds.) Systematics and conservation of African plants. Proceedings of the XVIII<sup>th</sup> triannual Congress of the AETFAT, Yaoundé, Cameroon. Kew Publishing, Royal Botanic Gardens, Kew, pp. 37–41.
Linnaeus, C. (1753) Species plantarum, exhibentes plantas rite cognitas, ad generarelatas, cum differentiis specificis, nominibus trivialibus, synonymis selectis, locis natalibus, secundum systema sexuale digestas. Vol. 1. Salvius, Stockholm. [Aloe L. treated on pp. 319–323]. https://doi.org/10.5962/bhl.title.59734
McCoy, T.[A.]. (2016) A new species of Aloe from the Republic of Angola [Aloe varimaculata T.A.McCoy]. Cactus and Succulent Journal (U.S.) 88 (6): 277–280. https://doi.org/10.2985/015.088.0603
Newton, L.E. (2020) Aloe. Asphodelaceae. In: U. Eggli & R. Nyffeler (eds.) Illustrated handbook of succulent plants: Monocotyledons, Vol. 1. Springer-Verlag, Berlin, pp. 485–696. https://doi.org/10.1007/978-3-662-56486-8_110
Rendle, A.B. (1917) Urticaceae. 2. Obetia, Gaud.; Benth. et Hook. f. Gen. Pl. iii. 382. In: Prain, D. (ed.) Flora of Tropical Africa [Ulmaceæ to Cycadacæ] VI (sect. 2). Lovell Reeve & Co., Limited, London, pp. 244–245. [https://www.biodiversitylibrary.org/page/378259#page/259/mode/1up]
Reynolds, G.W. (1960) Hunting aloes in Angola. African Wild Life 14: 13–25.
Reynolds, G.W. (1966) The aloes of tropical Africa and Madagascar. The Trustees, The Aloes Book Fund, Mbabane, 537 pp.
Seemann, B. (1865 [1 February]) Welwitschii iter angolense. (Continued from Vol. II. p. 339.) II. Hederaceæ novæ a cl. Dr. Welwitsch in Africa æquinoctiali occidentali lectæ, auctore Dr. B. Seemann. The Journal of Botany, British and Foreign III: 33–34, + Tab. 26 opposite p. 33. [https://www.biodiversitylibrary.org/item/54457#page/39/mode/1up]
Smith, G.F. & Figueiredo, E. (2011a) Provenance of the material on which the name Aloe mendesii Reynolds (Asphodelaceae), a cliff-dwelling species from Angola, is based. Bradleya 29: 61–66. https://doi.org/10.25223/brad.n29.2011.a7
Smith, G.F. & Figueiredo, E. (2011b) Aloe palmiformis, an endemic krantz aloe from Angola. Cactus & Succulent Journal (U.S.) 83: 22–27. https://doi.org/10.2985/0007-9367-83.1.22
Smith, G.F. & Figueiredo, E. (2020) Part VI. The family Asphodelaceae. In: Eggli, U. & Nyffeler, R. (eds.) Illustrated handbook of succulent plants. Monocotyledons. Vol. 1. Families Agavaceae to Asphodelaceae. 2<sup>nd</sup> edn. Springer-Verlag GmbH, part of Springer Nature, Berlin, pp. 475–481. https://doi.org/10.1007/978-3-662-56486-8
Thiers, B. (2021 [continuously updated]) Index herbariorum: a global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium. Available from: http://sweetgum.nybg.org/ih/ (accessed April 2021)
Turland, N.J., Wiersema, J.H., Barrie, F.R., Greuter, W., Hawksworth, D.L., Herendeen, P.S., Knapp, S., Kusber, W.-H., Li, D.-Z., Marhold, K., May, T.W., McNeill, J., Monro, A.M., Prado, J., Price, M.J. & Smith, G.F. (2018) International Code of Nomenclature for algae, fungi, and plants (Shenzhen Code) adopted by the Nineteenth International Botanical Congress Shenzhen, China, July 2017. [Regnum Vegetabile 159: 1–254.] https://doi.org/10.12705/Code.2018
Van Jaarsveld, E.J. (2012) Aloe mocamedensis, a new species from the Namib Desert, southwestern Angola. Bradleya 30: 173–178. https://doi.org/10.25223/brad.n30.2012.a21
Van Wyk, B.-E. & Smith, G.F. (2014) Guide to the aloes of South Africa. 3<sup>rd</sup> edn. Briza Publications, Pretoria, 376 pp.
White, F. (1983) The vegetation of Africa: a descriptive memoir to accompany the UNESCO/AETFAT/UNSO vegetation map of Africa. Natural Resources Research 20. UNESCO, Paris, 356 pp.