Abstract
The taxonomy and nomenclature of Kalanchoe ×vadensis (Crassulaceae subfam. Kalanchooideae) [hybrid formula: K. blossfeldiana × K. marmorata var. somaliensis], an artificially produced amphidiploid, are discussed and clarified. An amplified description is provided for the nothospecies. The name K. ×vadensis is epitypified.
References
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Adanson, M. (1763 [July–August]) <em>Familles des plantes. Contenant une Préface Historike fur l’état ancien & actuel de la Botanike, & une Téorie de cette Science</em>. II. Partie. Chez Vincent, Imprimeur-Libraire de M<sup>gr</sup> le Comte de Provence, rue S, Severin, Paris, 640 pp. [https://www.biodiversitylibrary.org/item/6958#page/794/mode/1up]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Baker, J.G. (1881 [21 February]) Notes on a collection of flowering plants made by L. Kitching, Esq., in Madagascar in 1879 (Plates VII. & VIII.). <em>Journal of the Linnean Society, Botany</em> 18: 264–281. [https://www.biodiversitylibrary.org/item/8373#page/271/mode/1up]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Baker, J.G. (1892 [10 September]) New or noteworthy plants. <em>Kalanchoe marmorata</em>, Baker, n. sp. <em>The Gardeners’ Chronicle. </em>[<em>A weekly illustrated journal of Horticulture and Allied Subjects</em>], 3<sup>rd</sup> ser., XII (No. 298) 300. [https://www.biodiversitylibrary.org/item/83803#page/316/mode/1up]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Baker, J.G. (1895) CCCCLXXV.—Diagnoses africanæ, VII. (continued from p. 153) [<em>Kalanchoe somaliensis</em> Baker on p. 214]. <em>Bulletin of Miscellaneous Information. Kew</em> 1895: 211–230. [https://www.biodiversitylibrary.org/item/127378#page/215/mode/1up]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Baldwin, J.T. Jr. (1938 [October]) <em>Kalanchoe</em>: the genus and its chromosomes. <em>American Journal of Botany</em> 25: 572–579. https://doi.org/10.1002/j.1537-2197.1938.tb09263.x</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Berger, A. (1930 [Mai]) Crassulaceae. Unterfam. II. Kalanchoideae [sic, Kalanchooideae]. 6. <em>Kalanchoe</em> Adanson. 7. <em>Kitchingia</em> Baker. 8. <em>Bryophyllum</em> Salisb. <em>In</em>: A. Engler & K. Prantl (eds.) <em>Die natürlichen Pflanzenfamilien</em>. edn 2, 18a. Verlag von Wilhelm Engelmann, Leipzig, pp. 378–386, 402–412.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bijmoer, R., Scherrenberg, M. & Creuwels, J. (2021) Naturalis Biodiversity Center (NL) - Botany. Naturalis Biodiversity Center. Occurrence dataset https://doi.org/10.15468/ib5ypt accessed via GBIF.org on 2021-11-16. [https://www.gbif.org/occurrence/2517740184]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bloemen Bureau Holland. (1999/2000) <em>Potplanten, pot plants, Topfpflanzen, plantes en pot, piante da vaso, planta en particular</em>. <em>1999/2000</em>. Bloemen Bureau Holland, Leiden, 150 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Boom, B.K. & Zeilinga, A.E. (1964 [September]) <em>Kalanchoe</em> ×<em>vadensis</em> spec. nova. <em>Succulenta</em> [<em>Netherlands</em>] 43 (9): 122–124.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Britten, J. (1871) Order L. Crassulaceae. 4. <em>Kalanchoe</em>, Linn.; Benth. et Hook. f. Gen. Pl. i. 659. <em>In</em>: Oliver, D. (ed.) <em>Flora of Tropical Africa (Leguminosae to Ficoideae) </em>2. L. Reeve & Co., London, pp. 390–398. [https://www.biodiversitylibrary.org/item/124#page/391/mode/1up]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Christensen, B., Sriskandarajah, S., Serek, M. & Müller, R. (2008) Transformation of <em>Kalanchoe blossfeldiana</em> with <em>rol</em>-genes is useful in molecular breeding towards compact growth. <em>Plant Cell Reports</em> 27: 1485–1495. https://doi.org/10.1007/s00299-008-0575-0</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Flower Council of Holland. (2004) <em>Plants from Holland naturally. 2005/2006. Potplanten, pot plants, Topfpflanzen, plantes en pot, piante da vaso, plantas de maceta</em>. Flower Council of Holland, Leiden, 134 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Friedmann, F. (1971) Sur de nouveaux nombres chromosomiques dans le genre <em>Kalanchoë</em> (Crassulacées) à Madagascar. <em>Candollea</em> 26: 103–107.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Heerlien, M., Van Leusen, J., Schnörr, S., De Jong-Kole, S., Raes, N. & Van Hulsen, K. (2015 [February]) The natural history production line: an industrial approach to the digitization of scientific collections. <em>ACM Journal on Computing and Cultural Heritage</em> 8 (1): Article 3, 12 pp. https://dx.doi.org/10.1145/2644822</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Hooker, J.D. (1901 [March]) <em>Kalanchoe bentii</em>. Native of Southern Arabia. Nat. Ord. Crassulaceæ. <em>Curtis’s Botanical Magazine</em>[<em>, comprising the plants of the Royal Gardens of Kew, and of other botanical establishments in Great Britain; with suitable descriptions;</em>] 3<sup>rd</sup> ser., LVII (or Vol. CXXVII of the whole work [No. 675 or No. 1369 of the entire work]): t. 7765. [https://www.biodiversitylibrary.org/item/14255#page/55/mode/1up]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">IPNI. (2022) [continuously updated] <em>The International Plant Names Index</em>. Available from: https://www.ipni.org/ (accessed 2022).</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Izumikawa, Y., Nakamura, I. & Mii, M. (2007) Interspecific hybridization between <em>Kalanchoe blossfeldiana</em> and several wild <em>Kalanchoe</em> species with ornamental value. <em>Acta Horticulturae</em> 743 (XXII International Eucarpia Symposium, Section Ornamentals, Breeding for Beauty - Part II): 59–65. https://doi.org/10.17660/ActaHortic.2007.743.7</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Kingsbury, N. (2009) <em>Hybrid. The history and science of plant breeding</em>. The University of Chicago Press, Chicago and London, 493 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Koorders, S.H. (1919 [Mai] [24 October 1918]) Beitrag zur Kenntniss der Flora von Java No. 18. Beschreibung von <em>Kalanchoë Schumacheri</em> vom Idjen-Plateau und Revision der Crassulaceae von Java. (Mit 2 lithographischen Tafeln.). <em>Bulletin du Jardin Botanique de Buitenzorg</em> sér. 3, 1 (3): 169–180, Figures 14 and 15. [https://www.biodiversitylibrary.org/item/27173#page/205/mode/1up (text); https://www.biodiversitylibrary.org/item/27173#page/243/mode/1up (figures)]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Kroon, G.H. (1994) A note on the origin of <em>Kalanchoë</em> ×<em>vadensis</em> Boom & Zeilinga (Crassulaceae). <em>Euphytica</em> 76: 125. https://doi.org/10.1007/BF00024029</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Kroon, G.H., De Jong, J. & Van Raamsdonk, L.W.D. (1989) Evaluation of the genus <em>Kalanchoe</em> for breeding of new cutflowers and potplants. <em>Acta Horticulturae</em> (International Symposium on the Development of New Floricultural Crops) 252: 111–116. https://doi.org/10.17660/ActaHortic.1989.252.14</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Kuang, Y., Lu, C.-H. & Hsu, F.-C. (2021) Restoring fertility for novel interspecific hybrids between <em>Kalanchoe garambiensis</em> and <em>K. nyikae</em> using colchicine treatment. <em>Plants</em> 10: a209, 16 pp. https://doi.org/10.3390/plants10020209</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Kuligowska Mackenzie, K., Lütken, H., Lopes Coelho, L., Dibbern Kaaber, M., Nymark Hegelund, J. & Müller, R. (2018) Chapter 19. Kalanchoë. <em>In</em>: J. van Huylenbroeck (ed.) <em>Handbook of Plant Breeding. Vol. 11. Ornamental crops</em>. [Editors-in-Chief, I. Rajcan & J. Vollman.] Springer International Publishing AG, part of Springer Nature, Cham, Switzerland, pp. 453–479.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Orton, T.J. (2019) <em>Horticultural plant breeding</em>. Academic Press, an imprint of Elsevier, London, San Diego, Cambridge (U.S.A.), and Oxford, 400 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Perrier de la Bâthie, [J.M.]H.[A.] (1928 [Février]) Observations nouvelles sur le genre <em>Kalanchoe</em>. <em>Archives de Botanique II, Bulletin Mensuel. Caen</em> 2 (2): 17–31.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Raadts, E. (1983) Cytotaxonomische Untersuchungen an <em>Kalanchoë</em> (Crassulaceae) 1. <em>Kalanchoë marmorata</em> Baker und 2 neue <em>Kalanchoë</em>-Arten aus Ostafrika. <em>Willdenowia</em> 13 (2): 373–385. [https://www.jstor.org/stable/3995856]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Raadts, E. (1989 [September]) Cytotaxonomische Untersuchungen an <em>Kalanchoë</em> (Crassulaceae) 3. Chromosomenzahlen ostafrikanischer <em>Kalanchoë</em>-Sippen. <em>Willdenowia</em> 19 (1): 169–174. [https://www.jstor.org/stable/3996938]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Raymond-Hamet. (1933) Observations sur le <em>Kalanchoe uniflora</em> (Stapf) Raymond-Hamet. <em>Bulletin de la Société Botanique de France</em> 80 (4): 542–548. https://doi.org/10.1080/00378941.1933.10833878</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Richard, A. (1847) <em>Tentamen Floræ Abyssinicæ seu Enumeratio Plantarum hucusque in plerisque Abyssiniæ provinciis detectarum et præcipue a beatis doctoribus Richard Quartin Dillon et Antonio Petit (annis 1838–1843) lectarum</em>. Vol. 1. Apud Arthus Bertrand, Editorem, Parisiis, 472 pp. https://doi.org/10.5962/bhl.title.334</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Rowley, G.D. (2017) <em>Succulents in cultivation—breeding new cultivars</em>. The British Cactus & Succulent Society, Hornchurch, Essex, 248 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Salisbury, R.A. (1805 [1 June 1805]) <em>The Paradisus Londinensis: or coloured figures of plants cultivated in the vicinity of the metropolis</em> 1. Published by William Hooker, No. 6, Frith Street, city not stated, presumably London, 157 pp. & 117 plates. https://doi.org/10.5962/bhl.title.53520</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Sharma, A.K. & Ghosh, S. (1967) Cytotaxonomy of Crassulaceae. <em>Biologisches Zentralblatt</em> 86 (supplement): 313–336.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. (2020a) Plant smart. The big easy. Gardening with <em>Kalanchoe</em>. <em>Veld & Flora</em> 106 (3): 40–43.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. (2020b) Character inheritance in <em>Kalanchoe </em>‘Vivien’ Bischofberger (Crassulaceae subfam. Kalanchooideae), a cultivar derived from an interspecific hybrid between two southern African species (<em>K. luciae </em>Raym.-Hamet × <em>K. sexangularis </em>N.E.Br.). <em>Bradleya</em> 38: 3–13. https://doi.org/10.25223/brad.n38.2020.a1</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. (2020c) <em>Kalanchoe</em> ×<em>estrelae</em> (Crassulaceae subfam. Kalanchooideae): a new nothospecies for the hybrid between <em>K. luciae</em> and <em>K. sexangularis</em>. <em>Phytotaxa</em> 441 (2): 225–228. https://doi.org/10.11646/phytotaxa.441.2.11</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. (2020d). Zwei Neuzugänge im <em>Kalanchoe</em>-Gartenbau: <em>K</em>. ×<em>estrelae</em> and <em>K</em>. ×<em>gunniae</em>. / Two recent additions to <em>Kalanchoe</em> horticulture: <em>K</em>. ×<em>estrelae</em> and <em>K</em>. ×<em>gunniae</em>. <em>Avonia</em> 38 (4): 322–327.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. (2020e) <em>Kalanchoe</em> Adans. subg. <em>Fernandesiae</em> Gideon F.Sm. (Crassulaceae subfam. Kalanchooideae), a new subgenus from southern and south-tropical Africa. <em>Haseltonia</em> 27: 2–7. https://doi.org/10.2985/026.027.0101</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. (2021a) <em>Kalanchoe</em> ×<em>leistneri</em> (<em>K. sexangularis</em> × <em>K. winteri</em>) (Crassulaceae subfam. Kalanchooideae), a new southern African nothospecies. <em>Phytotaxa</em> 509 (2): 248–254. https://doi.org/10.11646/phytotaxa.509.2.8</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. (2021b) Reinstatement of <em>Kalanchoe</em> [subg. <em>Bryophyllum</em>] sect. <em>Alatae</em> (Crassulaceae subfam. Kalanchooideae) for <em>K. porphyrocalyx</em> and <em>K. uniflora</em>, two Madagascan endemics. <em>Bradleya</em> 39: 177–181. https://doi.org/10.25223/brad.n39.2021.a17</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. (2021c) How <em>Kalanchoe marmorata</em> (Crassulaceae subfam. Kalanchooideae), a distinctive central and east African species, received its name, and the later, valid publication of <em>K. macrantha</em> by Maire. <em>Phytotaxa</em> 502 (1): 93–100. https://doi.org/10.11646/phytotaxa.502.1.7</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. (2022a) Notes on <em>Kalanchoe</em> subg. <em>Bryophyllum</em> (Crassulaceae subfam. Kalanchooideae) and the kalanchoes of Sijfert H. Koorders (1919). <em>Phytotaxa</em> 549 (1): 87–96. https://doi.org/10.11646/phytotaxa.549.1.7</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. (2022b) <em>Kalanchoe</em> sect. <em>Raveta</em> (Crassulaceae subfam. Kalanchooideae) of Raymond-Hamet (1916): a long-overlooked name in <em>K</em>. subg. <em>Kalanchoe</em>. <em>Phytotaxa</em> 550 (2): 208–212. https://doi.org/10.11646/phytotaxa.550.2.10</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. (2022c) The taxonomy of <em>Kalanchoe marmorata</em> Baker (Crassulaceae subfam. Kalanchooideae), a distinctive African species, revisited. <em>Phytotaxa</em> 538 (2): 100–112. https://doi.org/10.11646/phytotaxa.538.2.2</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. & Figueiredo, E. (2018) The infrageneric classification and nomenclature of <em>Kalanchoe </em>Adans. (Crassulaceae), with special reference to the southern African species. <em>Bradleya </em>36: 162–172. https://doi.org/10.25223/brad.n36.2018.a10</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. & Figueiredo, E. (2020) <em>Kalanchoe</em> ×<em>gildenhuysii</em> (Crassulaceae subfam. Kalanchooideae), a new nothospecies derived from <em>K. millotii</em> and <em>K. tomentosa</em>. <em>Phytotaxa</em> 442 (1): 43–46. https://doi.org/10.11646/phytotaxa.442.1.8</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. & Figueiredo, E. (2022) Nomenclatural notes on the economically important Flaming Katy, <em>Kalanchoe blossfeldiana</em> (Crassulaceae subfam. Kalanchooideae). <em>Phytotaxa</em> 549 (1): 104–110. https://doi.org/10.11646/phytotaxa.549.1.9</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F., Figueiredo, E. & Van Wyk, A.E. (2019) Kalanchoe <em>(Crassulaceae) in southern Africa. Classification, biology, and cultivation</em>. Academic Press, an imprint of Elsevier, London, San Diego, Cambridge (U.S.A.), and Oxford, 328 pp. https://doi.org/10.1016/C2017-0-00602-X</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. & Hankey, A. (2021) <em>Kalanchoe</em> ×<em>forbesiae</em> (Crassulaceae subfam. Kalanchooideae) derived from <em>K. lubangensis</em> × <em>K. sexangularis</em>: towards improved horticultural material. <em>Phytotaxa</em> 528 (5): 290–300. https://doi.org/10.11646/phytotaxa.528.5.3</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F., Klein, D.-P. & Shtein, R. (2021b) A revision of the Malagasy <em>Kalanchoe</em> subg. <em>Kitchingia</em> (Crassulaceae subfam. Kalanchooideae): history, taxonomy, and nomenclature. <em>Phytotaxa</em> 507 (1): 67–80. https://doi.org/10.11646/phytotaxa.507.1.3</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. & Monro, A.M. (2022a) The nomenclature and taxonomy of Crassulaceae subfam. Kalanchooideae resolved. <em>Phytotaxa</em> 555 (3): 241–251. https://doi.org/10.11646/phytotaxa.555.3.3</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. & Monro, A.M. (2022b) (2908) Proposal to reject the name Crassulaceae subfam. Cotyledonoideae (Crassulaceae). <em>Taxon</em> 71 (4): 910–911. https://doi.org/10.1002/tax.12778</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. & Shtein, R. (2021) A review of horticulturally desirable characters in <em>Kalanchoe</em> (Crassulaceae subfam. Kalanchooideae): variable and deviating vegetative and reproductive morphologies useful in breeding programmes. <em>Haseltonia</em> 28: 106–119. https://doi.org/10.2985/026.028.0110</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F., Shtein, R. & Klein, D.-P. (2021a) <em>Kalanchoe</em> subg. <em>Alatae</em> (Crassulaceae subfam. Kalanchooideae), a new rank for <em>K</em>. sect. <em>Alatae</em>. <em>Phytotaxa</em> 509 (2): 255–258. https://doi.org/10.11646/phytotaxa.509.2.9</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Stapf, O. (1897 [August and September]) 493. <em>Kalanchoe flammea</em>, Stapf. [Crassulaceae]. <em>In</em>: Anonymous, DLXXV.—Diagnoses africanæ, X. [Species 418–599]. <em>Bulletin of Miscellaneous Information of the Royal Botanic Gardens, Kew</em> 1897 (128–129): 243–300. [https://www.biodiversitylibrary.org/item/127162#page/272/mode/1up]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Thiers, B. (2022) [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 2022).</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">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>. Koeltz Botanical Books, Glashütten. [Regnum Vegetabile 159], 254 pp. https://doi.org/10.12705/Code.2018</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Van Nieuwerburgh, M., Boterdaele, D., Coppens, A., De Meyer, H., De Meyer, J., Imschoot, A., Trivier, L. & Van Hulle, M. (eds.) (No date [<em>ca</em>. 1990]) <em>De Belgische sierteelt / L’horticulture Belge / Belgian horticulture / Der Belgische Zierpflanzenbau</em>. Printing office of Het Volk N.V., Ghent, Belgium, 416 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Van Voorst, A. & Arends, J.C. (1982) The origin and chromosome numbers of cultivars of <em>Kalanchoe blossfeldiana</em> Von Poelln.: their history and evolution. <em>Euphytica</em> 31 (3): 573–584.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Veldkamp, J.F. (1980) The Rijksherbarium at 150 years. <em>Taxon</em> 29 (1): 101–104. https://doi.org/10.2307/1219603</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Von Poellnitz, [J.]K.[L.A.]. (1934) XV. <em>Kalanchoe Blossfeldiana</em>. <em>Repertorium specierum novarum regni vegetabilis. Centralblatt für Sammlung und Veröffentlichung von Einzeldiagnosen neuer Pflanzen</em> 35: 159–160. [https://bibdigital.rjb.csic.es/ing/Libro.php?Libro=6015]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Watson, W. [as “W.W.”] (1902 [24 May]) New and interesting plants. <em>Kalanchoe kewensis</em>. <em>Ornithogalum kewense</em>. <em>Cymbidium rhodochilum</em>. <em>Pitcairnea cœrulea</em>. <em>The Garden (London, 1871–1927)</em> 61 (No. 1529): 338–339. [https://www.biodiversitylibrary.org/item/79275#page/356/mode/1up]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Wight, R. & Walker-Arnot, G.A. (1834) <em>Prodromus floræ peninsulæ indiæ orientalis : containing abridged descriptions of the plants found in the Peninsula of British India, arranged according to the natural system</em>. Vol. I. Parbury, Allen, & Co., London. [https://www.biodiversitylibrary.org/page/3608847#page/398/mode/1up]</span></span></span></p>
<p> </p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Baker, J.G. (1881 [21 February]) Notes on a collection of flowering plants made by L. Kitching, Esq., in Madagascar in 1879 (Plates VII. & VIII.). <em>Journal of the Linnean Society, Botany</em> 18: 264–281. [https://www.biodiversitylibrary.org/item/8373#page/271/mode/1up]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Baker, J.G. (1892 [10 September]) New or noteworthy plants. <em>Kalanchoe marmorata</em>, Baker, n. sp. <em>The Gardeners’ Chronicle. </em>[<em>A weekly illustrated journal of Horticulture and Allied Subjects</em>], 3<sup>rd</sup> ser., XII (No. 298) 300. [https://www.biodiversitylibrary.org/item/83803#page/316/mode/1up]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Baker, J.G. (1895) CCCCLXXV.—Diagnoses africanæ, VII. (continued from p. 153) [<em>Kalanchoe somaliensis</em> Baker on p. 214]. <em>Bulletin of Miscellaneous Information. Kew</em> 1895: 211–230. [https://www.biodiversitylibrary.org/item/127378#page/215/mode/1up]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Baldwin, J.T. Jr. (1938 [October]) <em>Kalanchoe</em>: the genus and its chromosomes. <em>American Journal of Botany</em> 25: 572–579. https://doi.org/10.1002/j.1537-2197.1938.tb09263.x</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Berger, A. (1930 [Mai]) Crassulaceae. Unterfam. II. Kalanchoideae [sic, Kalanchooideae]. 6. <em>Kalanchoe</em> Adanson. 7. <em>Kitchingia</em> Baker. 8. <em>Bryophyllum</em> Salisb. <em>In</em>: A. Engler & K. Prantl (eds.) <em>Die natürlichen Pflanzenfamilien</em>. edn 2, 18a. Verlag von Wilhelm Engelmann, Leipzig, pp. 378–386, 402–412.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bijmoer, R., Scherrenberg, M. & Creuwels, J. (2021) Naturalis Biodiversity Center (NL) - Botany. Naturalis Biodiversity Center. Occurrence dataset https://doi.org/10.15468/ib5ypt accessed via GBIF.org on 2021-11-16. [https://www.gbif.org/occurrence/2517740184]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bloemen Bureau Holland. (1999/2000) <em>Potplanten, pot plants, Topfpflanzen, plantes en pot, piante da vaso, planta en particular</em>. <em>1999/2000</em>. Bloemen Bureau Holland, Leiden, 150 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Boom, B.K. & Zeilinga, A.E. (1964 [September]) <em>Kalanchoe</em> ×<em>vadensis</em> spec. nova. <em>Succulenta</em> [<em>Netherlands</em>] 43 (9): 122–124.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Britten, J. (1871) Order L. Crassulaceae. 4. <em>Kalanchoe</em>, Linn.; Benth. et Hook. f. Gen. Pl. i. 659. <em>In</em>: Oliver, D. (ed.) <em>Flora of Tropical Africa (Leguminosae to Ficoideae) </em>2. L. Reeve & Co., London, pp. 390–398. [https://www.biodiversitylibrary.org/item/124#page/391/mode/1up]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Christensen, B., Sriskandarajah, S., Serek, M. & Müller, R. (2008) Transformation of <em>Kalanchoe blossfeldiana</em> with <em>rol</em>-genes is useful in molecular breeding towards compact growth. <em>Plant Cell Reports</em> 27: 1485–1495. https://doi.org/10.1007/s00299-008-0575-0</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Flower Council of Holland. (2004) <em>Plants from Holland naturally. 2005/2006. Potplanten, pot plants, Topfpflanzen, plantes en pot, piante da vaso, plantas de maceta</em>. Flower Council of Holland, Leiden, 134 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Friedmann, F. (1971) Sur de nouveaux nombres chromosomiques dans le genre <em>Kalanchoë</em> (Crassulacées) à Madagascar. <em>Candollea</em> 26: 103–107.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Heerlien, M., Van Leusen, J., Schnörr, S., De Jong-Kole, S., Raes, N. & Van Hulsen, K. (2015 [February]) The natural history production line: an industrial approach to the digitization of scientific collections. <em>ACM Journal on Computing and Cultural Heritage</em> 8 (1): Article 3, 12 pp. https://dx.doi.org/10.1145/2644822</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Hooker, J.D. (1901 [March]) <em>Kalanchoe bentii</em>. Native of Southern Arabia. Nat. Ord. Crassulaceæ. <em>Curtis’s Botanical Magazine</em>[<em>, comprising the plants of the Royal Gardens of Kew, and of other botanical establishments in Great Britain; with suitable descriptions;</em>] 3<sup>rd</sup> ser., LVII (or Vol. CXXVII of the whole work [No. 675 or No. 1369 of the entire work]): t. 7765. [https://www.biodiversitylibrary.org/item/14255#page/55/mode/1up]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">IPNI. (2022) [continuously updated] <em>The International Plant Names Index</em>. Available from: https://www.ipni.org/ (accessed 2022).</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Izumikawa, Y., Nakamura, I. & Mii, M. (2007) Interspecific hybridization between <em>Kalanchoe blossfeldiana</em> and several wild <em>Kalanchoe</em> species with ornamental value. <em>Acta Horticulturae</em> 743 (XXII International Eucarpia Symposium, Section Ornamentals, Breeding for Beauty - Part II): 59–65. https://doi.org/10.17660/ActaHortic.2007.743.7</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Kingsbury, N. (2009) <em>Hybrid. The history and science of plant breeding</em>. The University of Chicago Press, Chicago and London, 493 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Koorders, S.H. (1919 [Mai] [24 October 1918]) Beitrag zur Kenntniss der Flora von Java No. 18. Beschreibung von <em>Kalanchoë Schumacheri</em> vom Idjen-Plateau und Revision der Crassulaceae von Java. (Mit 2 lithographischen Tafeln.). <em>Bulletin du Jardin Botanique de Buitenzorg</em> sér. 3, 1 (3): 169–180, Figures 14 and 15. [https://www.biodiversitylibrary.org/item/27173#page/205/mode/1up (text); https://www.biodiversitylibrary.org/item/27173#page/243/mode/1up (figures)]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Kroon, G.H. (1994) A note on the origin of <em>Kalanchoë</em> ×<em>vadensis</em> Boom & Zeilinga (Crassulaceae). <em>Euphytica</em> 76: 125. https://doi.org/10.1007/BF00024029</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Kroon, G.H., De Jong, J. & Van Raamsdonk, L.W.D. (1989) Evaluation of the genus <em>Kalanchoe</em> for breeding of new cutflowers and potplants. <em>Acta Horticulturae</em> (International Symposium on the Development of New Floricultural Crops) 252: 111–116. https://doi.org/10.17660/ActaHortic.1989.252.14</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Kuang, Y., Lu, C.-H. & Hsu, F.-C. (2021) Restoring fertility for novel interspecific hybrids between <em>Kalanchoe garambiensis</em> and <em>K. nyikae</em> using colchicine treatment. <em>Plants</em> 10: a209, 16 pp. https://doi.org/10.3390/plants10020209</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Kuligowska Mackenzie, K., Lütken, H., Lopes Coelho, L., Dibbern Kaaber, M., Nymark Hegelund, J. & Müller, R. (2018) Chapter 19. Kalanchoë. <em>In</em>: J. van Huylenbroeck (ed.) <em>Handbook of Plant Breeding. Vol. 11. Ornamental crops</em>. [Editors-in-Chief, I. Rajcan & J. Vollman.] Springer International Publishing AG, part of Springer Nature, Cham, Switzerland, pp. 453–479.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Orton, T.J. (2019) <em>Horticultural plant breeding</em>. Academic Press, an imprint of Elsevier, London, San Diego, Cambridge (U.S.A.), and Oxford, 400 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Perrier de la Bâthie, [J.M.]H.[A.] (1928 [Février]) Observations nouvelles sur le genre <em>Kalanchoe</em>. <em>Archives de Botanique II, Bulletin Mensuel. Caen</em> 2 (2): 17–31.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Raadts, E. (1983) Cytotaxonomische Untersuchungen an <em>Kalanchoë</em> (Crassulaceae) 1. <em>Kalanchoë marmorata</em> Baker und 2 neue <em>Kalanchoë</em>-Arten aus Ostafrika. <em>Willdenowia</em> 13 (2): 373–385. [https://www.jstor.org/stable/3995856]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Raadts, E. (1989 [September]) Cytotaxonomische Untersuchungen an <em>Kalanchoë</em> (Crassulaceae) 3. Chromosomenzahlen ostafrikanischer <em>Kalanchoë</em>-Sippen. <em>Willdenowia</em> 19 (1): 169–174. [https://www.jstor.org/stable/3996938]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Raymond-Hamet. (1933) Observations sur le <em>Kalanchoe uniflora</em> (Stapf) Raymond-Hamet. <em>Bulletin de la Société Botanique de France</em> 80 (4): 542–548. https://doi.org/10.1080/00378941.1933.10833878</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Richard, A. (1847) <em>Tentamen Floræ Abyssinicæ seu Enumeratio Plantarum hucusque in plerisque Abyssiniæ provinciis detectarum et præcipue a beatis doctoribus Richard Quartin Dillon et Antonio Petit (annis 1838–1843) lectarum</em>. Vol. 1. Apud Arthus Bertrand, Editorem, Parisiis, 472 pp. https://doi.org/10.5962/bhl.title.334</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Rowley, G.D. (2017) <em>Succulents in cultivation—breeding new cultivars</em>. The British Cactus & Succulent Society, Hornchurch, Essex, 248 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Salisbury, R.A. (1805 [1 June 1805]) <em>The Paradisus Londinensis: or coloured figures of plants cultivated in the vicinity of the metropolis</em> 1. Published by William Hooker, No. 6, Frith Street, city not stated, presumably London, 157 pp. & 117 plates. https://doi.org/10.5962/bhl.title.53520</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Sharma, A.K. & Ghosh, S. (1967) Cytotaxonomy of Crassulaceae. <em>Biologisches Zentralblatt</em> 86 (supplement): 313–336.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. (2020a) Plant smart. The big easy. Gardening with <em>Kalanchoe</em>. <em>Veld & Flora</em> 106 (3): 40–43.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. (2020b) Character inheritance in <em>Kalanchoe </em>‘Vivien’ Bischofberger (Crassulaceae subfam. Kalanchooideae), a cultivar derived from an interspecific hybrid between two southern African species (<em>K. luciae </em>Raym.-Hamet × <em>K. sexangularis </em>N.E.Br.). <em>Bradleya</em> 38: 3–13. https://doi.org/10.25223/brad.n38.2020.a1</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. (2020c) <em>Kalanchoe</em> ×<em>estrelae</em> (Crassulaceae subfam. Kalanchooideae): a new nothospecies for the hybrid between <em>K. luciae</em> and <em>K. sexangularis</em>. <em>Phytotaxa</em> 441 (2): 225–228. https://doi.org/10.11646/phytotaxa.441.2.11</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. (2020d). Zwei Neuzugänge im <em>Kalanchoe</em>-Gartenbau: <em>K</em>. ×<em>estrelae</em> and <em>K</em>. ×<em>gunniae</em>. / Two recent additions to <em>Kalanchoe</em> horticulture: <em>K</em>. ×<em>estrelae</em> and <em>K</em>. ×<em>gunniae</em>. <em>Avonia</em> 38 (4): 322–327.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. (2020e) <em>Kalanchoe</em> Adans. subg. <em>Fernandesiae</em> Gideon F.Sm. (Crassulaceae subfam. Kalanchooideae), a new subgenus from southern and south-tropical Africa. <em>Haseltonia</em> 27: 2–7. https://doi.org/10.2985/026.027.0101</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. (2021a) <em>Kalanchoe</em> ×<em>leistneri</em> (<em>K. sexangularis</em> × <em>K. winteri</em>) (Crassulaceae subfam. Kalanchooideae), a new southern African nothospecies. <em>Phytotaxa</em> 509 (2): 248–254. https://doi.org/10.11646/phytotaxa.509.2.8</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. (2021b) Reinstatement of <em>Kalanchoe</em> [subg. <em>Bryophyllum</em>] sect. <em>Alatae</em> (Crassulaceae subfam. Kalanchooideae) for <em>K. porphyrocalyx</em> and <em>K. uniflora</em>, two Madagascan endemics. <em>Bradleya</em> 39: 177–181. https://doi.org/10.25223/brad.n39.2021.a17</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. (2021c) How <em>Kalanchoe marmorata</em> (Crassulaceae subfam. Kalanchooideae), a distinctive central and east African species, received its name, and the later, valid publication of <em>K. macrantha</em> by Maire. <em>Phytotaxa</em> 502 (1): 93–100. https://doi.org/10.11646/phytotaxa.502.1.7</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. (2022a) Notes on <em>Kalanchoe</em> subg. <em>Bryophyllum</em> (Crassulaceae subfam. Kalanchooideae) and the kalanchoes of Sijfert H. Koorders (1919). <em>Phytotaxa</em> 549 (1): 87–96. https://doi.org/10.11646/phytotaxa.549.1.7</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. (2022b) <em>Kalanchoe</em> sect. <em>Raveta</em> (Crassulaceae subfam. Kalanchooideae) of Raymond-Hamet (1916): a long-overlooked name in <em>K</em>. subg. <em>Kalanchoe</em>. <em>Phytotaxa</em> 550 (2): 208–212. https://doi.org/10.11646/phytotaxa.550.2.10</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. (2022c) The taxonomy of <em>Kalanchoe marmorata</em> Baker (Crassulaceae subfam. Kalanchooideae), a distinctive African species, revisited. <em>Phytotaxa</em> 538 (2): 100–112. https://doi.org/10.11646/phytotaxa.538.2.2</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. & Figueiredo, E. (2018) The infrageneric classification and nomenclature of <em>Kalanchoe </em>Adans. (Crassulaceae), with special reference to the southern African species. <em>Bradleya </em>36: 162–172. https://doi.org/10.25223/brad.n36.2018.a10</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. & Figueiredo, E. (2020) <em>Kalanchoe</em> ×<em>gildenhuysii</em> (Crassulaceae subfam. Kalanchooideae), a new nothospecies derived from <em>K. millotii</em> and <em>K. tomentosa</em>. <em>Phytotaxa</em> 442 (1): 43–46. https://doi.org/10.11646/phytotaxa.442.1.8</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. & Figueiredo, E. (2022) Nomenclatural notes on the economically important Flaming Katy, <em>Kalanchoe blossfeldiana</em> (Crassulaceae subfam. Kalanchooideae). <em>Phytotaxa</em> 549 (1): 104–110. https://doi.org/10.11646/phytotaxa.549.1.9</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F., Figueiredo, E. & Van Wyk, A.E. (2019) Kalanchoe <em>(Crassulaceae) in southern Africa. Classification, biology, and cultivation</em>. Academic Press, an imprint of Elsevier, London, San Diego, Cambridge (U.S.A.), and Oxford, 328 pp. https://doi.org/10.1016/C2017-0-00602-X</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. & Hankey, A. (2021) <em>Kalanchoe</em> ×<em>forbesiae</em> (Crassulaceae subfam. Kalanchooideae) derived from <em>K. lubangensis</em> × <em>K. sexangularis</em>: towards improved horticultural material. <em>Phytotaxa</em> 528 (5): 290–300. https://doi.org/10.11646/phytotaxa.528.5.3</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F., Klein, D.-P. & Shtein, R. (2021b) A revision of the Malagasy <em>Kalanchoe</em> subg. <em>Kitchingia</em> (Crassulaceae subfam. Kalanchooideae): history, taxonomy, and nomenclature. <em>Phytotaxa</em> 507 (1): 67–80. https://doi.org/10.11646/phytotaxa.507.1.3</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. & Monro, A.M. (2022a) The nomenclature and taxonomy of Crassulaceae subfam. Kalanchooideae resolved. <em>Phytotaxa</em> 555 (3): 241–251. https://doi.org/10.11646/phytotaxa.555.3.3</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. & Monro, A.M. (2022b) (2908) Proposal to reject the name Crassulaceae subfam. Cotyledonoideae (Crassulaceae). <em>Taxon</em> 71 (4): 910–911. https://doi.org/10.1002/tax.12778</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F. & Shtein, R. (2021) A review of horticulturally desirable characters in <em>Kalanchoe</em> (Crassulaceae subfam. Kalanchooideae): variable and deviating vegetative and reproductive morphologies useful in breeding programmes. <em>Haseltonia</em> 28: 106–119. https://doi.org/10.2985/026.028.0110</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Smith, G.F., Shtein, R. & Klein, D.-P. (2021a) <em>Kalanchoe</em> subg. <em>Alatae</em> (Crassulaceae subfam. Kalanchooideae), a new rank for <em>K</em>. sect. <em>Alatae</em>. <em>Phytotaxa</em> 509 (2): 255–258. https://doi.org/10.11646/phytotaxa.509.2.9</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Stapf, O. (1897 [August and September]) 493. <em>Kalanchoe flammea</em>, Stapf. [Crassulaceae]. <em>In</em>: Anonymous, DLXXV.—Diagnoses africanæ, X. [Species 418–599]. <em>Bulletin of Miscellaneous Information of the Royal Botanic Gardens, Kew</em> 1897 (128–129): 243–300. [https://www.biodiversitylibrary.org/item/127162#page/272/mode/1up]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Thiers, B. (2022) [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 2022).</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">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>. Koeltz Botanical Books, Glashütten. [Regnum Vegetabile 159], 254 pp. https://doi.org/10.12705/Code.2018</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Van Nieuwerburgh, M., Boterdaele, D., Coppens, A., De Meyer, H., De Meyer, J., Imschoot, A., Trivier, L. & Van Hulle, M. (eds.) (No date [<em>ca</em>. 1990]) <em>De Belgische sierteelt / L’horticulture Belge / Belgian horticulture / Der Belgische Zierpflanzenbau</em>. Printing office of Het Volk N.V., Ghent, Belgium, 416 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Van Voorst, A. & Arends, J.C. (1982) The origin and chromosome numbers of cultivars of <em>Kalanchoe blossfeldiana</em> Von Poelln.: their history and evolution. <em>Euphytica</em> 31 (3): 573–584.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Veldkamp, J.F. (1980) The Rijksherbarium at 150 years. <em>Taxon</em> 29 (1): 101–104. https://doi.org/10.2307/1219603</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Von Poellnitz, [J.]K.[L.A.]. (1934) XV. <em>Kalanchoe Blossfeldiana</em>. <em>Repertorium specierum novarum regni vegetabilis. Centralblatt für Sammlung und Veröffentlichung von Einzeldiagnosen neuer Pflanzen</em> 35: 159–160. [https://bibdigital.rjb.csic.es/ing/Libro.php?Libro=6015]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Watson, W. [as “W.W.”] (1902 [24 May]) New and interesting plants. <em>Kalanchoe kewensis</em>. <em>Ornithogalum kewense</em>. <em>Cymbidium rhodochilum</em>. <em>Pitcairnea cœrulea</em>. <em>The Garden (London, 1871–1927)</em> 61 (No. 1529): 338–339. [https://www.biodiversitylibrary.org/item/79275#page/356/mode/1up]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Wight, R. & Walker-Arnot, G.A. (1834) <em>Prodromus floræ peninsulæ indiæ orientalis : containing abridged descriptions of the plants found in the Peninsula of British India, arranged according to the natural system</em>. Vol. I. Parbury, Allen, & Co., London. [https://www.biodiversitylibrary.org/page/3608847#page/398/mode/1up]</span></span></span></p>
<p> </p>