References
- Akaike, H. (1974). A new look at the statistical model identification. IEEE Transactions on Automatic Control, 19, 716–723.
- Baldwin, B. G. (1992). Phylogenetic utility of the Internal Transcribed Spacers of nuclear ribosomal DNA in plants: An example from the Compositae. Molecular Phylogenetics and Evolution, 1, 3–16.
- Bellstedt, D. U., Galley, C., Pirie, M. D., & Linder, H. P. (2012). The migration of the Palaeotropical arid flora: Zygophylloideae as an example. Systematic Botany, 37, 951–959.
- Bruyns, P. V., Klak, C., & Hanáček, P. (2014). Evolution of the stapeliads (Apocynaceae–Asclepiadoideae), repeated major radiation across Africa in an Old World group. Molecular Phylogenetics and Evolution, 77, 251–263.
- Bruyns, P. V., Klak, C., & Hanáček, P. (2015). Recent radiation of Brachystelma and Ceropegia (Apocynaceae) across the Old World against a background of climatic change. Molecular Phylogenetics and Evolution, 90, 49–66.
- Chen, C., Qi, Z. C., Xu, X. H., Comes, H. P., Koch, M. A., Jin, X. J., … Qiu, Y. X. (2014). Understanding the formation of Mediterranean–African–Asian disjunctions: Evidence for Miocene climate-driven vicariance and recent long-distance dispersal in the Tertiary relict Smilax aspera (Smilacaceae). New Phytologist, 204, 243–255.
- Dyer, R. A. (1979). Notes on African plants. The Riocreuxia flanaganii complex. Bothalia, 12, 632.
- Dyer, R. A. (1980). Asclepiadaceae (Brachystelma, Ceropegia, Riocreuxia). In O. A. Leistner (Ed.), Flora of Southern Africa (Vol. 27, p. 4). Pretoria: Government Printer.
- Dyer, R. A. (1983). Ceropegia, Brachystelma and Riocreuxia in Southern Africa. Rotterdam: Balkema.
- Fischer, E., Killmann, D., & Meve, U. (2013). Neoschumannia gishwatiensis (Apocynaceae, Asclepiadoideae-Ceropegieae) from Gishwati Forest, Rwanda—a third and new species from a disjunct African genus. Phytotaxa, 77, 19–26.
- Germishuizen, G., & Meyer, N. L. (Eds.). (2003). Plants of southern Africa: An annotated checklist. Strelitzia 14. Pretoria: National Botanical Institute.
- Goyder, D. J. (2006). An overview of Asclepiad biogeography. In S. A. Ghazanfar & H. J. Beentje (Eds.), Taxonomy and ecology of African plants, their conservation and sustainable use (pp. 205–214). Kew: Royal Botanic Gardens.
- Harvey, W. H. (1863). Lophostephanus mollis. In Thesaurus Capensis, vol. 2, 2: 9, t. 113. Dublin: Hodges, Smith & Co.
- Huelsenbeck, J. P., & Ronquist, F. R. (2001). MrBayes: Bayesian inference of phylogeny. Biometrics, 17, 754–755.
- Hurvich, C. M., & Tsai, C.-L. (1989). Regression and time series model selection in small samples. Biometrika, 76, 297–307.
- Kunze, H. (1991). Structure and function in Asclepiad pollination. Plant Systematics and Evolution, 176, 227–253.
- Liede-Schumann, S., Rapini, A., Goyder, D. J., & Chase, M. W. (2005). Phylogenetics of the New World subtribes of Asclepiadeae (Apocynaceae-Asclepiadoideae): Metastelmatinae, Oxypetalinae, and Gonolobinae. Systematic Botany, 30, 184–200.
- Masinde, P. S. (2005). A revision of the African genus Riocreuxia Decne. (Apocynaceae: Asclepiadoideae-Ceropegieae). Kew Bulletin, 60, 401–434.
- Masrahi, Y. S. (2015). A new species of Leptadenia (Apocynaceae) and two other new records from southwestern Saudi Arabia. Saudi Journal of Biological Sciences, 22, 631–636.
- Meve, U. (1995). Neoschumannia (including Swynnertonia), a primitive genus of the Asclepiadaceae-Stapelieae. Plant Systematics and Evolution, 197, 233–242.
- Meve, U. (1997). A new combination in Nepalese Asclepiadaceae - Stapelieae. Kew Bulletin, 52, 1011–1013.
- Meve, U. (1998). Emplectanthus N. E. Br.: A close relative of Riocreuxia Decne. in the Asclepiadaceae-Stapelieae. Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie, 120, 123–130.
- Meve, U., & Liede, S. (2001). Reconsideration of the status of Lavrania, Larryleachia and Notechidnopsis (Asclepiadoideae-Ceropegieae). South African Journal of Botany, 67, 161–168.
- Meve, U., & Liede, S. (2002). A molecular phylogeny and generic rearrangement of the stapelioid Ceropegieae (Apocynaceae-Asclepiadoideae). Plant Systematics and Evolution, 234, 171–209.
- Meve, U., & Liede, S. (2004). Subtribal division of Ceropegieae (Apocynaceae-Asclepiadoideae). Taxon, 53, 61–72.
- Meve, U., & Liede-Schumann, S. (2007). Ceropegia (Apocynaceae, Ceropegieae, Stapeliinae): Paraphyletic, but still taxonomically sound. Annals of the Missouri Botanical Garden, 94, 392–406.
- Norlindh, T., & Weimarck, H. (1935). Beiträge zur Kenntnis der Flora von Süd-Rhodesia III. Botaniska Notiser, 1935, 357–408.
- Posada, D. (2008). JModelTest: Phylogenetic model averaging. Molecular Biology and Evolution, 25, 1253–1256.
- Rahman, M. A., & Wilcock, C. C. (1991). A taxonomic revision of the Asiatic genus Pentasacme (Asclepiadaceae). Blumea, 36, 109–121.
- Rambaut, A., Suchard, M. A., Xie, D., & Drummond, A. J. (2014). Tracer v1.6. Retrieved from: http://beast.bio.ed.ac.uk/Tracer (accessed 5 July 2015).
- Rapini, A., Van den Berg, C., & Liede-Schumann, S. (2007). Diversification of Asclepiadoideae (Apocynaceae) in the New World. Annals of the Missouri Botanical Garden, 94, 407–422.
- Ribeiro, P. L., Rapini, A., Damascena, L. S., & van den Berg, C. (2014). Plant diversification in the Espinhaço Range: Insights from the biogeography of Minaria (Apocynaceae). Taxon 63, 1253–1264.
- Ronquist, F., & Huelsenbeck, J. P. (2003). MrBayes 3. Bayesian phylogenetic inference under mixed models. Bioinformatics, 19, 1572–1574.
- Ronquist, F., Teslenko, M., Van der Mark, P., Ayres, D. L., Darling, A., Höhna, S., … Huelsenbeck, J. P. (2012). MrBayes 3.2: Efficient Bayesian phylogenetic inference and model choice across a large model space. Systematic Biology, 61, 539–554.
- Sang, T., Crawford, D. J., & Stuessy, T. F. (1997). Chloroplast DNA phylogeny, reticulate evolution, and biogeography of Paeonia (Paeoniaceae). American Journal of Botany, 84, 1120–1136.
- Schlechter, R. (1896). Aulostephanus. Bulletin de l'Herbier Boissier, 4, 451.
- Singh, Y., Nicholas, A., & Pooley, E. (1997). Brachystelma natalense. The Flowering plants of Africa, 55, 96–101.
- Styles, D. (2010). A new species of Emplectanthus from eastern South Africa. Plant Life (Port Edwards), 39 & 40, 24–32.
- Sugiura, N. (1978). Further analysis of the data by Akaike's information criterion and the finite corrections. Communications in Statistics-Theory and Methods, A7, 13–26.
- Sukumaran, J., & Holder, M. T. (2010). DendroPy: A Python library for phylogenetic computing. Bioinformatics, 26, 1569–1571.
- Surveswaran, S., Kamble, M. Y., Yadav, S. R., & Sun, M. (2009). Molecular phylogeny of Ceropegia (Asclepiadoideae, Apocynaceae) from Indian Western Ghats. Plant Systematics and Evolution, 281, 51–63.
- Surveswaran, S., Sun, M., Grimm, G. W., & Liede-Schumann, S. (2014). On the systematic position of some Asian enigmatic genera of Asclepiadoideae (Apocynaceae). Botanical Journal of the Linnean Society, 174, 601–619.
- Taberlet, P., Gielly, L., Pautou, G., & Bouvet, J. (1991). Universal primers for amplification of three non-coding regions of chloroplast DNA. Plant Molecular Biology, 17, 1105–1109.
- The Plant List. (2013). Version 1.1. Retrieved from: http://www.theplantlist.org/ (accessed 09 December 2015).
- Van Steenis, C. G. G. J. (1952). Rheophytes. Proceedings of the Royal Society of Queensland, 62, 61–68.
- Wheeler, T. J., & Kececioglu, J. D. (2007). Multiple alignments by aligning alignments. Bioinformatics, 23, i559–i568.
- Yu, Y., Harris, A., & He, X. J. (2014). RASP (Reconstruct Ancestral State in Phylogenies) 3.0. Retrieved from: http://mnh.scu.edu.cn/soft/blog/RASP/ (accessed 14 September 2016).
- Zwickl, D. J. (2006). Genetic algorithm approaches for the phylogenetic analysis of large biological sequence datasets under the maximum likelihood criterion. PhD thesis, Austin: The University of Texas.