Abstract
Material derived from the hybrid between Kalanchoe blossfeldiana and K. pumila (Crassulaceae subfam. Kalanchooideae) has proven to present a useful genetic resource in the global, especially indoor, horticultural trade. Various named and unnamed selections that likely have the formula K. blossfeldiana × K. pumila, or that at least have one or both of these two species in their genetic makeup, are available. However, to date this hybrid has not been provided with a name to facilitate communication about it, including about aspects of its biology, such as character inheritance. Material derived from K. blossfeldiana × K. pumila is here described as K. ×trageri. Reference is made to cultivars that likely have been based on K. ×trageri, or even on K. pumila, the species.
References
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Crouch, N.R., Smith, G.F., Walters, M. & Figueiredo, E. (2016) Kalanchoe winteri Gideon F.Sm., N.R.Crouch & Mich.Walters (Crassulaceae), a new species from the Wolkberg Centre of Endemism, South Africa. Bradleya 34: 217–224. https://doi.org/10.25223/brad.n34.2016.a9
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Eller, B.M. & Willi, P. (1977) Die Bedeutung der Wachsausblühungen auf Blättern von Kalanchoe pumila Baker für die Absorption der Globalstrahlung. Flora 166: 461–474.
Engler, A. (1894) Über die Gliederung der Flora Usambara und der angrenzenden Gebiete. [Kalanchoe lateritia Engl. cryptically described on p. 19.] Abhandlungen der Königlichen Akademie derWissenschaften zu Berlin 1894: 1–86. [https://www.biodiversitylibrary.org/item/92793#page/55/mode/1up]
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Friedmann, F. (1971) Sur de nouveaux nombres chromosomiques dans le genre Kalanchoë (Crassulacees) à Madagascar. Condollea 26: 103–107.
Graf, A.B. (1980 [January]) Exotica series 3. Pictorial cyclopedia of exotic plants from tropical regions. [12,000 illustrations, 204 plants in colour, guide to care of plants indoors, horticultural colour guide, plant geography]. 10<sup>th</sup> edn. Roehrs Company Inc., E. Rutherford, N.J. 07073, USA, 1834 pp.
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Hamet, R. & Perrier de la Bâthie, J.M.H.A. (1912) Contribution à l’étude des Crassulacées malgaches. Annales des Sciences Naturelles. Botanique, sér. 9, 16: 361–377. [https://www.biodiversitylibrary.org/item/24564#page/771/mode/1up]
Haworth, A.H. (1824 [September]) XXXI. Decas novarum Plantarum Succulentarum. (“Mr Haworth’s Decade of new Succulent Plants.”) [Crassula rotundifolia Haw. described on p. 188]. The Philosophical Magazine and Journal 64: 184–191. [https://www.biodiversitylibrary.org/item/53102#page/208/mode/1up]
Haworth, A.H. (1825 [06 July]) III. Decas quarta novarum Plantarum Succulentarum (“Mr Haworth’s Fourth Decade of new Succulent Plants.”) [Kalanchoe rotundifolia (Haw.) Haw. published on p. 31]. The Philosophical Magazine and Journal 66: 27–33. [https://www.biodiversitylibrary.org/item/53098#page/49/mode/1up]
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Koorders, S.H. (1919 [Mai] [24 October 1918]) Beitrag zur Kenntniss der Flora von Java No. 18. Beschreibung von Kalanchoë Schumacheri vom Idjen-Plateau und Revision der Crassulaceae von Java. (Mit 2 lithographischen Tafeln.). Bulletin du Jardin Botanique de Buitenzorg 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)
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Raymond-Hamet. (1916) Sur un groupe de transition reliant le genre Kalanchoe au genre Cotyledon. Revue Générale de Botanique. Paris XXVIII: 80–84. [https://www.biodiversitylibrary.org/item/45180#page/83/mode/1up]
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Salisbury, R.A. (1805 [1 June 1805]) The Paradisus Londinensis: or coloured figures of plants cultivated in the vicinity of the metropolis 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
Sharma, A.K. & Ghosh, S. (1967) Cytotaxonomy of Crassulaceae. Biologisches Zentralblatt 86 (supplement): 313–336.
Shaw, J.M.H. (2008) An investigation of the cultivated Kalanchoe daigremontiana group, with a checklist of Kalanchoe cultivars. Hanburyana 3: 17–79.
Smith, G.F. (2020a) Kalanchoe Adans. subg. Fernandesiae Gideon F.Sm. (Crassulaceae subfam. Kalanchooideae), a new subgenus from southern and south-tropical Africa. Haseltonia 27: 2–7. https://doi.org/10.2985/026.027.0101
Smith, G.F. (2020b) Kalanchoe ×estrelae (Crassulaceae subfam. Kalanchooideae): a new nothospecies for the hybrid between K. luciae and K. sexangularis. Phytotaxa 441 (2): 225–228. https://doi.org/10.11646/phytotaxa.441.2.11
Smith, G.F. (2020c) Character inheritance in Kalanchoe ‘Vivien’ Bischofberger (Crassulaceae subfam. Kalanchooideae), a cultivar derived from an interspecific hybrid between two southern African species (K. luciae Raym.-Hamet × K. sexangularis N.E.Br.). Bradleya 38: 3–13. https://doi.org/10.25223/brad.n38.2020.a1
Smith, G.F. (2020d). Zwei Neuzugänge im Kalanchoe-Gartenbau: K. ×estrelae and K. ×gunniae. / Two recent additions to Kalanchoe horticulture: K. ×estrelae and K. ×gunniae. Avonia 38 (4): 322–327.
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Smith, G.F. (2021b) Kalanchoe ×leistneri (K. sexangularis × K. winteri) (Crassulaceae subfam. Kalanchooideae), a new southern African nothospecies. Phytotaxa 509 (2): 248–254. https://doi.org/10.11646/phytotaxa.509.2.8
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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.). Journal of the Linnean Society, Botany (London) 18: 264–281. [https://www.biodiversitylibrary.org/item/8373#page/271/mode/1up]
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Baldwin, J.T. Jr. (1938 [October]) Kalanchoe: the genus and its chromosomes. American Journal of Botany 25 (8): 572–579. https://doi.org/10.2307/2436516
Bloemen Bureau Holland. (1999/2000) Potplanten, pot plants, Topfpflanzen, plantes en pot, piante da vaso, planta en particular. 1999/2000. Bloemen Bureau Holland, Leiden, 150 pp.
Brickell, C. (Editor-in-Chief). (1998) The Royal Horticultural Society A–Z Encyclopedia of garden plants. Corrected reprint. Dorling Kindersley, London, 1080 pp.
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Brown, N.E. (1913) 1436. Diagnoses Africanae LIII. Bulletin of Miscellaneous Information, Kew 1913 (3): 118–123. [https://www.biodiversitylibrary.org/item/43726#page/123/mode/1up]
Brown Folsom, D., Trager, J.N., Folsom, J., Clements, J. & Scott, N. (1995) Dry climate gardening with succulents. In: E. McDonald (Series Ed.), The American Garden Guides. Pantheon Books, Knopf Publishing Group, New York, 224 pp.
Bryant, G., Bryant, K., Rutherford, B. & Vogan, R. (2005) Cacti & Succulents. Kalanchoe. In: L. Barnard, A. Edwards, K. Etherington, D. Imwold, E. King, M. Malone & J. Parker (Eds.) The ultimate plant book. New Holland, London, 1024 pp.
Crouch, N.R., Smith, G.F., Walters, M. & Figueiredo, E. (2016) Kalanchoe winteri Gideon F.Sm., N.R.Crouch & Mich.Walters (Crassulaceae), a new species from the Wolkberg Centre of Endemism, South Africa. Bradleya 34: 217–224. https://doi.org/10.25223/brad.n34.2016.a9
Durrant, L. (Comp.). (2020) Kalanchoe. Crassulaceae. In: J. Cubey (Editor-in-Chief), RHS plant finder 2020. 34<sup>th</sup> edn. Royal Horticultural Society, London, 990 pp.
Eller, B.M. & Willi, P. (1977) Die Bedeutung der Wachsausblühungen auf Blättern von Kalanchoe pumila Baker für die Absorption der Globalstrahlung. Flora 166: 461–474.
Engler, A. (1894) Über die Gliederung der Flora Usambara und der angrenzenden Gebiete. [Kalanchoe lateritia Engl. cryptically described on p. 19.] Abhandlungen der Königlichen Akademie derWissenschaften zu Berlin 1894: 1–86. [https://www.biodiversitylibrary.org/item/92793#page/55/mode/1up]
Engler, A. (Ed.) (1895) Verzeichniss der bis jetzt aus Ost-Afrika bekannt gewordenen Pflanzen. Die Pflanzenwelt Ost-Afrikas und der Nachbargebiete. Theil C. [Kalanchoe lateritia Engl. more fully described on p. 189.] Geographische Verlagshandlung Dietrich Reimer, Berlin, pp. 1–433. [https://www.biodiversitylibrary.org/item/10523#page/194/mode/1up]
Figueiredo, E., Smith, G.F. & Crouch, N.R. (2016) The taxonomy and type of Kalanchoe sexangularis N.E.Br. (Crassulaceae). Bradleya 34: 92–99. https://doi.org/10.25223/brad.n34.2016.a24
Flower Council of Holland. (2004) Plants from Holland naturally. 2005/2006. Potplanten, pot plants, Topfpflanzen, plantes en pot, piante da vaso, plantas de maceta. Flower Council of Holland, Leiden, 134 pp.
Friedmann, F. (1971) Sur de nouveaux nombres chromosomiques dans le genre Kalanchoë (Crassulacees) à Madagascar. Condollea 26: 103–107.
Graf, A.B. (1980 [January]) Exotica series 3. Pictorial cyclopedia of exotic plants from tropical regions. [12,000 illustrations, 204 plants in colour, guide to care of plants indoors, horticultural colour guide, plant geography]. 10<sup>th</sup> edn. Roehrs Company Inc., E. Rutherford, N.J. 07073, USA, 1834 pp.
Hamet, R. (1908) Kalanchoe luciae sp. nov. Bulletin de l’Herbier Boissier, sér. 2, 8: 254–257. [https://www.biodiversitylibrary.org/item/104945#page/290/mode/1up]
Hamet, R. & Perrier de la Bâthie, J.M.H.A. (1912) Contribution à l’étude des Crassulacées malgaches. Annales des Sciences Naturelles. Botanique, sér. 9, 16: 361–377. [https://www.biodiversitylibrary.org/item/24564#page/771/mode/1up]
Haworth, A.H. (1824 [September]) XXXI. Decas novarum Plantarum Succulentarum. (“Mr Haworth’s Decade of new Succulent Plants.”) [Crassula rotundifolia Haw. described on p. 188]. The Philosophical Magazine and Journal 64: 184–191. [https://www.biodiversitylibrary.org/item/53102#page/208/mode/1up]
Haworth, A.H. (1825 [06 July]) III. Decas quarta novarum Plantarum Succulentarum (“Mr Haworth’s Fourth Decade of new Succulent Plants.”) [Kalanchoe rotundifolia (Haw.) Haw. published on p. 31]. The Philosophical Magazine and Journal 66: 27–33. [https://www.biodiversitylibrary.org/item/53098#page/49/mode/1up]
IPNI. (2022+) The International Plant Names Index. Available from: https://www.ipni.org/ (continuously updated; accessed 2022).
Koorders, S.H. (1919 [Mai] [24 October 1918]) Beitrag zur Kenntniss der Flora von Java No. 18. Beschreibung von Kalanchoë Schumacheri vom Idjen-Plateau und Revision der Crassulaceae von Java. (Mit 2 lithographischen Tafeln.). Bulletin du Jardin Botanique de Buitenzorg 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)
Merrick, J. (Comp.). (2008) Kalanchoe. Crassulaceae. In: Armitage, J., Cubey, J., Edwards, D. & Lancaster, N. (Eds.) RHS plant finder 2008–2009. Compiled by the Royal Horticultural Society. 22<sup>nd</sup> edn. Dorling Kindersley Ltd, London, 970 pp.
Orton, T.J. (2019) Horticultural plant breeding. Academic Press, an imprint of Elsevier, London, San Diego, Cambridge (U.S.A.), and Oxford, 400 pp.
Raymond-Hamet. (1916) Sur un groupe de transition reliant le genre Kalanchoe au genre Cotyledon. Revue Générale de Botanique. Paris XXVIII: 80–84. [https://www.biodiversitylibrary.org/item/45180#page/83/mode/1up]
Raymond-Hamet. (1933) Observations sur le Kalanchoe uniflora (Stapf) Raymond-Hamet. Bulletin de la Société Botanique de France 80 (4): 542–548. https://doi.org/10.1080/00378941.1933.10833878
Salisbury, R.A. (1805 [1 June 1805]) The Paradisus Londinensis: or coloured figures of plants cultivated in the vicinity of the metropolis 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
Sharma, A.K. & Ghosh, S. (1967) Cytotaxonomy of Crassulaceae. Biologisches Zentralblatt 86 (supplement): 313–336.
Shaw, J.M.H. (2008) An investigation of the cultivated Kalanchoe daigremontiana group, with a checklist of Kalanchoe cultivars. Hanburyana 3: 17–79.
Smith, G.F. (2020a) Kalanchoe Adans. subg. Fernandesiae Gideon F.Sm. (Crassulaceae subfam. Kalanchooideae), a new subgenus from southern and south-tropical Africa. Haseltonia 27: 2–7. https://doi.org/10.2985/026.027.0101
Smith, G.F. (2020b) Kalanchoe ×estrelae (Crassulaceae subfam. Kalanchooideae): a new nothospecies for the hybrid between K. luciae and K. sexangularis. Phytotaxa 441 (2): 225–228. https://doi.org/10.11646/phytotaxa.441.2.11
Smith, G.F. (2020c) Character inheritance in Kalanchoe ‘Vivien’ Bischofberger (Crassulaceae subfam. Kalanchooideae), a cultivar derived from an interspecific hybrid between two southern African species (K. luciae Raym.-Hamet × K. sexangularis N.E.Br.). Bradleya 38: 3–13. https://doi.org/10.25223/brad.n38.2020.a1
Smith, G.F. (2020d). Zwei Neuzugänge im Kalanchoe-Gartenbau: K. ×estrelae and K. ×gunniae. / Two recent additions to Kalanchoe horticulture: K. ×estrelae and K. ×gunniae. Avonia 38 (4): 322–327.
Smith, G.F. (2020e) Kalanchoe ×hankeyi [= K. longiflora × K. sexangularis] (Crassulaceae subfam. Kalanchooideae), a new nothospecies from South Africa. Phytotaxa 451 (1): 93–96. https://doi.org/10.11646/phytotaxa.451.1.9
Smith, G.F. (2021a) Reinstatement of Kalanchoe [subg. Bryophyllum] sect. Alatae (Crassulaceae subfam. Kalanchooideae) for K. porphyrocalyx and K. uniflora, two Madagascan endemics. Bradleya 39: 177–181. https://doi.org/10.25223/brad.n39.2021.a17
Smith, G.F. (2021b) Kalanchoe ×leistneri (K. sexangularis × K. winteri) (Crassulaceae subfam. Kalanchooideae), a new southern African nothospecies. Phytotaxa 509 (2): 248–254. https://doi.org/10.11646/phytotaxa.509.2.8
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