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