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Issue: Vol. 632 No. 2: 28 Dec. 2023
Type: Article
Published: 2023-12-28
DOI: 10.11646/phytotaxa.632.2.8
Page range: 184-192
Abstract views: 116
PDF downloaded: 6

Cotyledon mckayi (Crassulaceae subfam. Kalanchooideae), a new cremnophytic species from the central Tugela River Basin of KwaZulu-Natal, South Africa

Biodiversity Research and Monitoring Directorate; South African National Biodiversity Institute; P.O. Box 52099; Berea Road; Durban; 4007 South Africa. School of Chemistry & Physics; University of KwaZulu-Natal; Durban; 4041 South Africa
Ria Olivier Herbarium; Department of Botany; Nelson Mandela University; P.O. Box 77000; Gqeberha; 6031 South Africa
Cotyledon barbeyi Cotyledon nielsii Cotyledon orbiculata var. oblonga Cotyledon velutina eastern southern Africa identification key Eudicots

Abstract

A new Cotyledon species, C. mckayi is described from cliffs of the central Tugela River basin in KwaZulu-Natal province, South Africa. Although the flowers of this new species are superficially similar in terms of shape and size to those of C. nielsii, also from KwaZulu-Natal, C. mckayi is readily separable on both vegetative and reproductive characters, from this and all other taxa of Cotyledon that occur naturally in the province. A key to allow identification of fertile material of the Cotyledon species of KwaZulu-Natal is provided.

 

References

  1. Baker, J.G. (1893 [27 May]) New or noteworthy plants. Cotyledon barbeyi, Schweinf. ined.* The Gardeners’ Chronicle. [A weekly illustrated journal of Horticulture and Allied Subjects], 3rd ser., XIIII(No. 335): 624–625. [https://www.biodiversitylibrary.org/item/83804#page/646/mode/1up]
  2. Berger, A. (1930 [Mai]) Crassulaceae. Unterfam. II. Kalanchoideae [sic; Kalanchooideae]. In: A. Engler & K. Prantl (Eds.) Die natürlichen Pflanzenfamilien, edn 2, 18a. Verlag von Wilhelm Engelmann, Leipzig, pp. 378–386.
  3. Carbutt, C. (2023 [9 November]) The Greater Midlands—a mid-elevation Centre of Floristic Endemism in summer-rainfall eastern South Africa. Diversity 15 (11): a1137. [24 pp.] https://doi.org/10.3390/d15111137
  4. Crouch, N.R., Styles, D.G.A. & Walters, M. (2021) Cotyledon nielsii (Crassulaceae), a new cremnophyte from KwaZulu-Natal, South Africa. Bradleya 39: 131–137.
  5. De Candolle, A.P. (1828 [mid-March]) Prodromus systematis naturalis regni vegetabilis, sive enumeratio contracta ordinum, generum, specierumque plantarum huc usque cognitarum, juxta methodi naturalis normas digesta. Pars Tertia. Sistens Calyciflorarum Ordines XXVI. Sumptibus Sociorum Treuttel et Wurtz, rue de Bourbon, no 17, Paris, & Strasbourg & London, 494 pp. https://doi.org/10.5962/bhl.title.286
  6. Haworth, A.H. (1812) Synopsis plantarum succulentarum, cum descriptionibus, synonymis, locis; observationibus anglicanis, culturaque. Typis Richardi Taylor et Socii, Shoe-Lane, Londoni [London], 334 pp., including 14 numbered “APPENDIX” pages. https://doi.org/10.5962/bhl.title.9462
  7. Hooker (1868) Cotyledon velutina. Velvety-leaved Cotyledon. Curtis’s Botanical Magazine 94: t. 5684. [https://www.biodiversitylibrary.org/item/14370#page/8/mode/1up]
  8. IPNI. (2023+) The International Plant Names Index. Available from: https://www.ipni.org/ (continuously updated; accessed August 2023).
  9. Linnaeus, C. (1753) Species plantarum, exhibentes plantas rite cognitas, ad genera relatas, cum differentiis specificis, nominibus trivialibus, synonymis selectis, locis natalibus, secundum systema sexuale digestas. Volumes 1 and 2. Salvius, Stockholm, 560 pp. [volume 1] and 1200 pp. [total]; indices not paginated. http://dx.doi.org/10.5962/bhl.title.669
  10. Mort, M.E., Levsen, N., Randle, C.P., Van Jaarsveld, E.[J.] & Palmer, A. (2005 [July]) Phylogenetics and diversification of Cotyledon (Crassulaceae) inferred from nuclear and chloroplast DNA sequence data. American Journal of Botany 92 (7): 1170–1176. https://doi.org/10.3732/ajb.92.7.1170
  11. Raper, P.E., Möller, L.A. & Du Plessis, L.T. (2014) Dictionary of southern African place names. Jonathan Ball Publishers, Jeppestown, Johannesburg, 566 pp.
  12. Rutherford, M.C., Mucina, L., Lötter, M.C., Bredenkamp, G.J., Smit, J.H.L., Scott-Shaw, C.R., Hoare, D.B., Goodman, P.S., Bezuidenhout, H., Scott, L., Ellis, F., Powrie, L.W., Siebert, F., Mostert, T.H., Henning, B.J., Venter, C.E., Camp, K.G.T., Siebert, S.J., Matthews, W.S., Burrows, J.E., Dobson, L., Van Rooyen, N., Schmidt, E., Winter, P.J.D., Du Preez, P.J., Ward, R.A., Williamson, S. & Hurter, P.J.H. (2006) Savanna Biome. In: Mucina, L. & Rutherford, M.C. (Eds.) The vegetation of South Africa, Lesotho and Swaziland. Strelitzia 19. South African National Biodiversity Institute, Pretoria, pp. 439–567.
  13. Smith, G.F. & Monro, A.M. (2022a) The nomenclature and taxonomy of Crassulaceae subfam. Kalanchooideae resolved. Phytotaxa 555 (3): 241–251. https://doi.org/10.11646/phytotaxa.555.3.3
  14. Smith, G.F. & Monro, A.M. (2022b) (2908) Proposal to reject the name Crassulaceae subfam. Cotyledonoideae (Crassulaceae). Taxon 71 (4): 910–911. https://doi.org/10.1002/tax.12778
  15. Thiers, B. (2023+) 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/ (continuously updated; accessed August 2023).
  16. Tölken, H.R. (1979) A re-evaluation of the Cotyledon orbiculata complex. Bothalia 12 (4): 615–620. https://doi.org/10.4102/abc.v12i4.1425
  17. Tölken, H.R. (1985) Crassulaceae. 3164, Cotyledon. In: Leistner, O.A. (Ed.) Flora of Southern Africa 14. Botanical Research Institute, Department of Agriculture and Water Supply, place of publication not stated, likely Pretoria, pp. 3–18.
  18. 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. Koeltz Botanical Books, Oberreifenberg. [Regnum Vegetabile 159], 254 pp. https://doi.org/10.12705/Code.2018
  19. Van Jaarsveld, E. (2015) Cotyledon petiolaris, a new cliff-dwelling succulent from the Eastern Cape, South Africa. Bradleya 33: 21–26. https://doi.org/10.25223/brad.n33.2015.a4
  20. Van Jaarsveld, E. (2017) Cotyledon egglii, a new species from the Barberton region, Mpumalanga, South Africa. Bradleya 35: 180–185. https://doi.org/10.25223/brad.n35.2017.a20
  21. Van Jaarsveld, E. & Koutnik, D. (2004) Cotyledon and Tylecodon. Umdaus Press, Hatfield, 156 pp.
  22. Van Wyk, A.E. & Smith, G.F. (2001) Regions of floristic endemism in southern Africa. A review with emphasis on succulents. Umdaus Press, Hatfield, Pretoria, 199 pp.