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Apios chendezhaoana (Fabaceae), an overlooked species and a new combination from China: evidence from morphological and molecular analyses



Apios chendezhaoana, a new combination derived from Sinolegumenea chendezhaoana, is recognized by both morphological and molecular evidence. It is a new member within Apios, and it is also an endemic and endangered species from East and South China. Phylogenetic analyses indicate that it could be sister to A. fortunei, but morphologically it differs from all its allies by its broad triangular leaflets with caudate apices, white corolla, pink markings on the lower part of the keel, and dilated style with tufted hairs beneath the stigma. We provide a detailed description, photographs, illustrations, and distribution map. We also estimate its conservation status according to IUCN criteria. A key to Apios is also provided, together with a brief revision.


endangered species, legume, new synonym, taxonomy, Eudicots

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Ali, S.I. (1968) The correct name of Millettia ovalifolia sensu Baker (Leguminosae). Kew Bulletin 21 (3): 489–490.

Baker, J.G. (1876) Apios. In: The Flora of British India. L. Reeve & Co., 5 Henrietta Street, Covent Garden. London, 188 pp.

Bentham, G. (1837) Centrosema. In: Commentationes de Leguminosarum Generibus. Linnean Society, London, pp. 53–56.

Bentham, G. (1862) Platycyamus. In: Martius, C.F.P. (Ed.) Flora Brasiliensis 15 (1B). R. Oldenbourg, Munich & Leipzig, pp. 323–324.

Blackmon, W.J. (1986) Locating and growing groundnut. Apios Tribune 1: 5–7.

Briquet, J.I. (Ed. & chairman) (1906) International rules of botanical nomenclature. Adopted by the International botanical congress of Vienna, 1905. Verlag Von Gustav Fischer, Jena, Germany.

Bruneau, A. & Anderson, G.J. (1988) Reproductive biology of diploid and triploid Apios americana (Leguminosae). American Journal of Botany 75: 1876–1883.

Bruneau, A. & Anderson, G.J. (1994) To bee or not to bee?: the pollination biology of Apios americana (Leguminosae). Plant Systematics and Evolution 192: 147–149.

Chapman, A.W. (1860) Desmodium. In: Flora of the southern United States. Ivison, Phinney, New York, pp. 101–104.

Chen, T.C. (1982) Apios. In: Hou, K.Z. (Eds.) A dictionary of the families and genera of Chinese seed plants. Science Press, Beijing, 36 pp.

Cornut, J.P. (1633) Canadensium plantarum: historia. Paris. 238 pp.

Doyle, J.J. (1987) A rapid DNA isolation procedure for small quantities of fresh leaf tissue. Phytochemical Bulletin 19: 11–15.

Dunn, S.T. (1903) Descriptions of new Chinese plant. Journal of the Linnean Society, Botany 35: 483–518.

Fabricius, P.C. (1759) Enumeratio, methodica plantarum. Helmstedt, Germany, 176 pp.

Franchet, A.R. (1890) Plantae Delavayanae. P. Klincksieck. Paris, pp. 180–181.

Handel-Mazzetti, H.R.E. (1933) Symbolae Sinicae: Botanische Ergebnisse der Expedition der Akademie der Wissenschaften in Wein nach Sudwest-China, 1914–1918. Vol. 7. J. Springer, Wien, 580 pp.

Hosokawa, T. (1932) Notulae leguminosae ex Asia-Orientale. Journal of the Society of Tropical Agriculture 4: 310.

Hu, Y.J., Liang, W.Q., Zhang, H.J. & Pu, J.B. (2017) Study on extraction and purification of the total alkaloids from Apios fortunei Maxim (In Chinese). Chinese Journal of Modern Applied Pharmacy 34 (1): 57–61.

Hutchison, J. (1964) The genera of flowering plants (Angiospermae), based principally on the Genera Plantarum of G. Bentham and J.D. Hooker. Clarendon Press, Oxford.

IUCN (2001) The IUCN red list of threatened species, version 2010.4. IUCN Red List Unit, Cambridge U.K. Available from: (accessed 23 November 2017)

Kajita, T., Ohashi, H., Tateishi, Y., Bauket, C.D. & Doyle, J.J. (2001) rbcL and legume phylogeny with particular reference to Phaseoleae, Millettieae, and allies. Systematic Botany 26: 515–536.

Katoh, K. & Standley, D.M. (2013) MAFFT multiple sequence alignment software version 7: improvements in performance and usability. Molecular Biology and Evolution 30: 772–780.

Kearse, M., Moir, R., Wilson, A., Stones-Havas, S., Cheung, M., Sturrock, S., Buxton, S., Cooper, A., Markowitz, S., Duran, C., Thierer, T., Ashton, B., Meintjes, P. & Drummond, A. (2012) Geneious basic: an integrated and extendable desktop software platform for the organization and analysis of sequence data. Bioinformatics 28: 1647–1649.

Lackey, J.A. (1981) A revised classification of the tribe Phaseoleae (Leguminosae, Papilionoideae), and its relation to canavanine distribution. Botanical Journal of the Linnean Society 74: 163–178.

Lanjouw, J. (1966) International Code of Botanical Nomenclature. Adopted by the International botanical congress of Montreal, 1959. International Bureau for Plant Taxonomy and Nomenclature of the International Association for Plant Taxonomy, Utrecht. 372 pp.

Léveille, A.A.H. (1914) Flore du Kouy-Tchéou. 225 pp.

Lewis, G., Schrire, B., Machinder, B. & Lock, M. (2005) Legumes of the World. The Royal Botanic Gardens, Kew.

Li, H.-L., Wang, W., Lin, L., Zhu, X.Y., Li, J.H. & Chen, Z.D. (2013) Diversification of the phaseoloid legumes: effects of climate change, range expansion and habit shift. Frontiers in plant science 4: 386.

Li, H.-L. (1952) Leguminosae. In: Floristic Relationships between Eastern Asia and Eastern North America. Morris Arboretum, University of Pennsylvania, pp. 390–391.

Li, J., Jiang, J., Stel, H.V., Homkes, A., Corajod, J., Brown, K. & Chen, Z.D. (2014) Phylogenetics and biogeography of Apios (Fabaceae) inferred from sequences of nuclear and plastid genes. International Journal of Plant Sciences 175 (7): 764–780.

Li, S.G. (1995) Apios. In: Delectis Florae Reipublicae Popularis Sinicae Agendae Academiae Sinicae (Eds.) Flora Reipublicae Popularis Sinicae 41. Science Press. Beijing, pp. 199–206.

Linnaeus, C. von (1753a) Clitoria. In: Species Plantarum 2. Impensis Laurentii Salvii, Holmiae, 753 pp.

Linnaeus, C. von (1753b) Glycine. In: Species Plantarum 2. Impensis Laurentii Salvii, Holmiae, pp. 753–755.

LPWG. (2017) A new subfamily classification of the Leguminosae based on a taxonomically comprehensive phylogeny. Taxon 66: 44–77.

Luo, D., Xu, B., Li, Z.M. & Sun, H. (2017) The ‘Ward Line–Mekong–Salween Divide’ is an important floristic boundary between the eastern Himalaya and Hengduan Mountains: evidence from the phylogeographical structure of subnival herbs Marmoritis complanatum (Lamiaceae). Botanical Journal of the Linnean Society 185: 482–496.

Maesen, L.J.G. van der (1986) Cajanus DC. and Atylosia W. & A. (Leguminosae) : a revision of all taxa closely related to the pigeonpea, with notes on other related genera within the subtribe Cajaninae. Agricultural University Wageningen Papers 85 (4): 1–225.

Maximowicz, C.J. (1873) Some new species from Japan. Bulletin de l’Academie Imperiale des Sciences de St-Petersbourg, sér. 3 18 (4): 396–397.

Medikus, F.C. (1787) Versuch einer neuen Lehrart. Vorlesungen der Churpfälzischen physicalisch-ökonomischen Gesellschaft 2: 354–356.

Merrill, E.D. (1910) An enumeration of Philippine Leguminosae, with keys to the genera and species (concluded). Philippine Journal of Science 5 (2): 95–136.

Merrill, E.D. (1917) Glycine. In: An Interpretation of Rumphius’s Herbarium Amboinense. Bureau of printing, Manila, pp. 274–275.

Niyomdham, C. (1992) Notes on Thai and Indo-Chinese Phaseoleae (Leguminosae©Papilionoideae). Nordic Journal of Botany 12 (3): 339–346.

Oliver, D. (1890) Apios. In: Hooker’s Icones Plantarum 20 (2). Willams and Norgate, London, 1946 pls.

Ren, B. (2005) Systematics of the genera Apios Fabr. and Cochlianthus Benth. (Fabaceae). M. Sc. Dissertation. Institute of Botany, Chinese Academy of Sciences, Beijing.

Ren, B., Zhu, X.Y. & Jiang, Y.C. (2007) Systematic significance of leaf epidermal features in Apios and Cochlianthus (Leguminosae). Acta Phytotaxonomica Sinica 45 (3): 274–284.

Robinson, B.L. (1898) A new species Apios from Kentucky. Botanical Gazette 25 (6): 450–453.

Ronquist, F. & Huelsenbeck, J.P. (2003) MrBayes 3: Bayesian phylogenetic inference under mixed models. Bioinformatics 19: 1572–1574.

Sa, R. & Gilbert, M.G. (2010) Apios. In: Wu, Z.Y., Raven, P.H. & Hong, D.Y. (Eds.) Flora of China, Vol. 10. Missouri Botanical Garden, St. Louis, pp. 203–204.

Seabrook, J.A.E. & Dionne, L.A. (1976) Studies on the genus Apios. I. Chromosome number and distribution of Apios americana and A. prieana. Canadian Journal of Botany 54: 2567–2572.

Stamatakis, A. (2006) RAxML-VI-HPC: maximum likelihood-based phylogenetic analysis with thousands of taxa and mixed models. Bioinformatics 22: 2688–2690.

Stefanović, S., Pfeil, B.E., Palmer, J.D. & Doyel, J.J. (2009) Relationships among phaseoloid legumes based on sequences from eight chloroplast regions. Systematic Botany 34: 115–128.

Sweet, R. (1826) Tribus V. Phaseoleae. In: Sweet’s Hortus Britannicus 2. J. Ridgway, London, pp. 480–482.

Taubert, P.H.W. (1894) Papilionatae·Phaseoleae·Erythrinae. In: Engler, A. & Prantl, K. (Eds.) Die Natürlichen Pflanzenfamilien 3 (3). W. Engelmann, Leipzig, pp. 363–369.

Urban, I. (1905) Pachyrrhizus. In: Symbolae Antillanae seu Fundamenta Florae Indiae Occidentalis 4 (2). Paul Klincksieck, Parisiis, pp. 311–312.

Wallich, N. (1830) Mucuna macrocarpa. In: Plantae Asiaticae Rariores 1. Treuttel and Würtz, London, 41 pp, 47 pl.

Walpers, W.G. (1843) Vigna. In: Repertorium Botanices Systematicae 1 (5). Sumtibus Friderici Hofmeister, Lipsiae, pp. 778–779.

Walter, W.M., Croom, E.M.Jr., Catignant, G.L. & Thresher, W.C. (1986) Compositional study of Apios priceana tubers. Journal of Agricultural and Food Chemistry 4: 39–41.

Wariss, H.M., Yi, T.S., Wang, H. & Zhang, R. (2017) Characterization of the complete chloroplast genome of Dalbergia odorifera (Leguminosae), a rare and critically endangered legume endemic to China. Conservation Genetics Resources 10 (3): 527–530.

Wight, R. & Arnott, G. (1834) Leguminosae. In: Prodromus Florae Peninsulae Indiae Orientalis 1. Parbury, Allen & Co., London, pp. 178–298.

Woods, M. (1988) A revision of Apios and Cochlianthus (Leguminosae). PhD Dissertation. Southern Illinois University, Carbondale.

Woods, M. (2005) A revision of the North American species of Apios (Fabaceae). Castanea 70: 85–100.[0085:AROTNA]2.0.CO;2

Yang, Y.K., Liu, L.H., Wu, J.K., Wu, P.L. & Yu, J.J. (2004) New Taxa of the family Leguminosae from China (1). The Chinese Academic Medical Magazine of Organisms 3: 62–76.


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