Abstract
Following the reinstatement of Aloe davyana as an accepted taxon at the rank of species, rather than at that of variety under A. greatheadii, and the subsequent reinstatement of A. davyana var. subolifera, a new variety, A. davyana var. magdae, is here described. Aloe davyana var. magdae, from the southern part of the distribution range of the species, inter alia differs from the pale flesh-pink to dull brick-red-flowered autonymic variety by being more intensely red-flowered, while the other, north-central variety, A. davyana var. subolifera, is most often nearly white-flowered. In addition, the new variety has about twice as many leaves per rosette, in comparison to the autonymic variety and A. davyana var. subolifera.
References
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<p>Groenewald, B.H. [as “B.H.G.”] (1936) ’n Nuwe aloesoort van Pretoria distrik [<em>Aloe labiaflava</em>]. <em>Tydskrif vir Wetenskap en Kuns</em> 14: 57–59.</p>
<p>Groenewald, B.H. (1939) <em>Aloe davyana </em>var. <em>subolifera</em>. <em>The Flowering Plants of South Africa </em>19: t. 732. [https://archive.org/details/floweringplantso19unse/page/n53/mode/2up]</p>
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<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://www.biodiversitylibrary.org/item/13829#page/331/mode/1up]</p>
<p>Pole Evans, I.B. (1915) Descriptions of some new aloes from the Transvaal [including <em>Aloe longibracteata</em> Pole-Evans on p. 25]. <em>Transactions of the Royal Society of South Africa</em> 5: 25–35, + Plates V–XV. [https://www.biodiversitylibrary.org/page/47226163#page/87/mode/1up]</p>
<p>Reynolds, G.W. (1950) <em>The aloes of South Africa</em>. The Aloes of South Africa Book Fund, Johannesburg, 534 pp.</p>
<p>Salm-Reifferscheidt-Dyck, J.F.M.A.H.I. von. (1822) <em>Observationes botanicae in horto dyckensi</em>. [3]. Typis Th. Fr. Thiriart, Coloniae [Köln], 47 pp. [https://babel.hathitrust.org/cgi/pt?id=hvd.32044102804077&view=1up&seq=5]</p>
<p>Salm-Reifferscheidt-Dyck, J.F.M.A.H.I. von. (1837 [probably June]) <em>Monographia generum aloes et mesembryanthemi</em>, Fasc. 1. Maximillian Cohen, Bonn, 60 plates, 72 pp. https://doi.org/10.5962/bhl.title.153143</p>
<p>Schönland, S. (1904) On some new and some little known species of South African plants. II. <em>Records of the Albany Museum</em> 1: 114–124. [https://www.biodiversitylibrary.org/item/31254#page/132/mode/1up]</p>
<p>Schönland, S. (1905) On some South African species of <em>Aloe</em> with special reference to those represented in the Herbarium of the Albany Museum. II. <em>Records of the Albany Museum</em> 1: 282–295. [https://www.biodiversitylibrary.org/item/31254#page/308/mode/1up]</p>
<p>Smith, G.F. (1996) Arthur Koeleman (1915–1994). <em>Bothalia</em> 26 (1): 77–80. https://doi.org/10.4102/abc.v26i1.693</p>
<p>Smith, G.F. & Figueiredo, E. (2015) <em>Garden aloes. Growing and breeding cultivars and hybrids</em>. Jacana Media (Pty), Ltd, Auckland Park, Johannesburg, xiv, 193 pp.</p>
<p>Smith, G.F. & Figueiredo, E. (2019) <em>Aloe</em> ×<em>gemmelliae</em> (Asphodelaceae subfam. Alooideae), a new natural hybrid between <em>A. broomii</em> and <em>A. grandidentata</em> from the southwestern Free State province, South Africa. <em>Phytotaxa</em> 423 (3): 182–186. https://doi.org/10.11646/phytotaxa.423.3.6</p>
<p>Smith, G.F. & Klopper, R.R. (2021) Reinstatement of <em>Aloe labiaflava</em> (Asphodelaceae subfam. Alooideae), a distinctive species of maculate aloe endemic to the western Mpumalanga province of South Africa. <em>Phytotaxa</em> 512 (3): 179–189. https://doi.org/10.11646/phytotaxa.512.3.5</p>
<p>Smith, G.F., Klopper, R.R., Crouch, N.R. & Figueiredo, E. (2020) Reinstatement of <em>Aloe davyana </em>(Asphodelaceae subfam. Alooideae), a winter-flowering species endemic to central-northeastern South Africa. <em>Phytotaxa </em>475 (3): 201–208. https://doi.org/10.11646/phytotaxa.475.3.4</p>
<p>Smith, G.F., Klopper, R.R., Crouch, N.R. & Figueiredo, E. (2021) Reinstatement of <em>Aloe davyana</em> var. <em>subolifera</em> (Asphodelaceae subfam. Alooideae), a distinctive variety of an endemic South African aloe. <em>Phytotaxa</em> 482 (2): 208–212. https://doi.org/10.11646/phytotaxa.482.2.9</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 September 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) 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</em> 159: 1–254. https://doi.org/10.12705/Code.2018</p>
<p>Groenewald, B.H. [as “B.H.G.”] (1936) ’n Nuwe aloesoort van Pretoria distrik [<em>Aloe labiaflava</em>]. <em>Tydskrif vir Wetenskap en Kuns</em> 14: 57–59.</p>
<p>Groenewald, B.H. (1939) <em>Aloe davyana </em>var. <em>subolifera</em>. <em>The Flowering Plants of South Africa </em>19: t. 732. [https://archive.org/details/floweringplantso19unse/page/n53/mode/2up]</p>
<p>IPNI. (2021+ [continuously updated]) <em>The International Plant Names Index</em>. Available from: https://www.ipni.org/ (accessed September 2021).</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://www.biodiversitylibrary.org/item/13829#page/331/mode/1up]</p>
<p>Pole Evans, I.B. (1915) Descriptions of some new aloes from the Transvaal [including <em>Aloe longibracteata</em> Pole-Evans on p. 25]. <em>Transactions of the Royal Society of South Africa</em> 5: 25–35, + Plates V–XV. [https://www.biodiversitylibrary.org/page/47226163#page/87/mode/1up]</p>
<p>Reynolds, G.W. (1950) <em>The aloes of South Africa</em>. The Aloes of South Africa Book Fund, Johannesburg, 534 pp.</p>
<p>Salm-Reifferscheidt-Dyck, J.F.M.A.H.I. von. (1822) <em>Observationes botanicae in horto dyckensi</em>. [3]. Typis Th. Fr. Thiriart, Coloniae [Köln], 47 pp. [https://babel.hathitrust.org/cgi/pt?id=hvd.32044102804077&view=1up&seq=5]</p>
<p>Salm-Reifferscheidt-Dyck, J.F.M.A.H.I. von. (1837 [probably June]) <em>Monographia generum aloes et mesembryanthemi</em>, Fasc. 1. Maximillian Cohen, Bonn, 60 plates, 72 pp. https://doi.org/10.5962/bhl.title.153143</p>
<p>Schönland, S. (1904) On some new and some little known species of South African plants. II. <em>Records of the Albany Museum</em> 1: 114–124. [https://www.biodiversitylibrary.org/item/31254#page/132/mode/1up]</p>
<p>Schönland, S. (1905) On some South African species of <em>Aloe</em> with special reference to those represented in the Herbarium of the Albany Museum. II. <em>Records of the Albany Museum</em> 1: 282–295. [https://www.biodiversitylibrary.org/item/31254#page/308/mode/1up]</p>
<p>Smith, G.F. (1996) Arthur Koeleman (1915–1994). <em>Bothalia</em> 26 (1): 77–80. https://doi.org/10.4102/abc.v26i1.693</p>
<p>Smith, G.F. & Figueiredo, E. (2015) <em>Garden aloes. Growing and breeding cultivars and hybrids</em>. Jacana Media (Pty), Ltd, Auckland Park, Johannesburg, xiv, 193 pp.</p>
<p>Smith, G.F. & Figueiredo, E. (2019) <em>Aloe</em> ×<em>gemmelliae</em> (Asphodelaceae subfam. Alooideae), a new natural hybrid between <em>A. broomii</em> and <em>A. grandidentata</em> from the southwestern Free State province, South Africa. <em>Phytotaxa</em> 423 (3): 182–186. https://doi.org/10.11646/phytotaxa.423.3.6</p>
<p>Smith, G.F. & Klopper, R.R. (2021) Reinstatement of <em>Aloe labiaflava</em> (Asphodelaceae subfam. Alooideae), a distinctive species of maculate aloe endemic to the western Mpumalanga province of South Africa. <em>Phytotaxa</em> 512 (3): 179–189. https://doi.org/10.11646/phytotaxa.512.3.5</p>
<p>Smith, G.F., Klopper, R.R., Crouch, N.R. & Figueiredo, E. (2020) Reinstatement of <em>Aloe davyana </em>(Asphodelaceae subfam. Alooideae), a winter-flowering species endemic to central-northeastern South Africa. <em>Phytotaxa </em>475 (3): 201–208. https://doi.org/10.11646/phytotaxa.475.3.4</p>
<p>Smith, G.F., Klopper, R.R., Crouch, N.R. & Figueiredo, E. (2021) Reinstatement of <em>Aloe davyana</em> var. <em>subolifera</em> (Asphodelaceae subfam. Alooideae), a distinctive variety of an endemic South African aloe. <em>Phytotaxa</em> 482 (2): 208–212. https://doi.org/10.11646/phytotaxa.482.2.9</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 September 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) 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</em> 159: 1–254. https://doi.org/10.12705/Code.2018</p>