Abstract

Sedum matsuense, a new species from the Matsu Islands, is described. This species is only found in Peigan Island and Dongju Island. Previously, this species has been misidentified as S. lineare. However, they can be easily distinguished by phyllotaxy (alternate vs. 3- or 4-verticillate) and leaf shape (linear-lanceolate to oblanceolate, apex acute vs. linear, apex subacute). The phylogenetic analysis also indicates that S. matsuense is distantly related to S. lineare and to the other resembling species. In this paper, to aid in identification, we provide descriptions, photographs, and line drawings.

Keyword: Crassulaceae, ITS, Sedum hangzhouense, Sedum leptophyllum, Sedum lineare, Sedum polytrichoides, Taiwan

Literature Cited

Carrillo-Reyes, P., Sosa, V., Mort, M.E. 2009 Molecular phylogeny of the Acre clade (Crassulaceae): Dealing with the lack of definitions for Echeveria and Sedum. Mol. Phylogenet. Evol. 53(1): 267–276.
DOI: 10.1016/j.ympev.2009.05.022View Article Google Scholar

Darriba, D., Posada, D., Kozlov, A.M., Stamatakis, A., Morel, B., Flouri, T. 2019 ModelTest-NG: A new and scalable tool for the selection of DNA and protein evolutionary models. Mol. Biol. Evol. 37(1): 291–294.
DOI: 10.1093/molbev/msz189View Article Google Scholar

Edgar, R.C. 2004 MUSCLE: a multiple sequence alignment method with reduced time and space complexity. BMC Bioinformatics 5(1): 113.
DOI: 10.1109/CSB.2004.1332560View Article Google Scholar

Elder, D., Klien, J., Antonelli, A., Silvestro, D. 2021 raxmalGUI 2.0: A graphical interface and toolkit for phylogenetic analyses using RAxML. Methods Ecol. Evol. 12(2): 373–377.
DOI: 10.1111/2041-210X.13512View Article Google Scholar

Fourment, M., Holmes, E.C. 2016 Seqotron: a user-friendly sequence editor for Mac OS X. BMC Res. Notes 9(1): 106.
DOI: 10.1186/s13104-016-1927-4View Article Google Scholar

Fu, K.T., Ohba, H. 2001 Sedum. In: Editorial Committee of Flora of China (Eds.) Flora of China 8, pp. 221–251. Missouri Botanical Garden Press, St. Louis.

Hsu, T.-C., Chung, S.-W. 2022 Validation of the name Sedum triangulosepalum (Crassulaceae). Phytotaxa 547(2): 215–216.
DOI: 10.11646/phytotaxa.547.2.10View Article Google Scholar

Ito, T., Chen, R., Yang, Q., Saito, Y., Yokota, M., Kokubugata, G. 2014 Taxonomic reexamination of Sedum formosanum (Crassulaceae) in Japan, Taiwan, and the Philippines based on molecular data. Journ. Phytogeogr. Taxon. 62: l–9.

Ito, T., Yu, C., Nakamura, K., Chung, K., Yang, Q., Fu, C., Qi, Z., Kokubugata, G. 2017a Unique parallel radiations of high-mountainous species of the genus Sedum (Crassulaceae) on the continental island of Taiwan. Mol. Phylogenet. Evol. 113: 9–22.
DOI: 10.1016/j.ympev.2017.03.028View Article Google Scholar

Ito, T., Nakanishi, H., Yu, C.-C., Minoda, K., Kokubugata, G. 2017b Sedum danjoense (Crassulaceae), a new species of succulent plants from the Danjo Islands in Japan. Phytotaxa 309(1): 23–34.
DOI: 10.11646/phytotaxa.309.1.2View Article Google Scholar

Ito, T., Yu, C.-C., Yokota, M., Kokubugata, G. 2020 Sedum formosanum subsp. miyakojimense (Crassulaceae), a new subspecies from Miyako-jima Island of the Ryukyu Islands, Japan. PhytoKeys 148: 51–70.
DOI: 10.3897/phytokeys.148.48957View Article Google Scholar

IUCN 2012 IUCN Red List Categories and Criteria: Version 3.1., 2nd edition. IUCN, Gland, Switzerland and Cambridge, UK.

Kuo, C.-M. 2004 Flora of Matsu. Lienchiang County Government. pp. 834.

Lu, C.-T., Lin, H.-W., Wang, J.-C. 2019 Two new species of Sedum (Crassulaceae) from Taiwan. Taiwania 64(4): 426–431.
DOI: 10.6165/tai.2019.64.426View Article Google Scholar

Mayuzumi, S., Ohba, H. 2004 The phylogenetic position of Eastern Asian Sedoideae (Crassulaceae) inferred from chloroplast and nuclear DNA sequences. Syst. Bot. 29(3): 587–598.
DOI: 10.1600/0363644041744329View Article Google Scholar

Mort, M. E., D. E. Soltis, P. S. Soltis, J. Francisco-Ortega, and A. Santos-Guerra. 2002 Phylogenetics and evolution of the Macaronesian clade of Crassulaceae inferred from nuclear and chloroplast sequence data. Syst. Bot. 27: 271–288.

Ohba, H. 2001 Crassulaceae. In: Iwatsuki, K., Boufford, D. E. and Ohba, H. (eds.), Flora of Japan 2b. pp. 21–29. Kodansha, Tokyo.

Rambaut, A. 2010 FigTree v1.3.1. Institute of Evolutionary Biology, University of Edinburgh, Edinburgh. http://tree.bio.ed.ac.uk/software/figtree/

Ronquist, F., Teslenko, M., van der Mark, P., Ayres, D.L., Darling, A., Hohna, S., Larget, B., Liu, L., Suchard, M.A., Huelsenbeck, J.P. 2012 MrBayes 3.2: Efficient Bayesian phylogenetic inference and model choice across a large model space. Syst. Biol. 61(3): 539–542.
DOI: 10.1093/sysbio/sys029View Article Google Scholar

t Hart, H, Bleij, B. 2003 Sedum. In: Eggli, U. (ed), Illustrated handbook of succulent plants: Crassulaceae. Springer, Berlin, pp 235–332.

Thiede, J., Eggli, U. 2007 Crassulaceae. In: Kubitzki, K. (ed), The families and genera of vascular plants, vol IX. Springer, Berlin, pp. 83–118.
DOI: 10.1007/978-3-540-32219-1_12View Article Google Scholar

Tzeng, H.-Y., Wang, C.-M., Wang, C.-C., Wang, C.-M. Tseng, Y.-H., Ou, C.H. 2012 A survey of native flora and invasive plants in the Matsu area. Taiwan Forestry Journal 38(4): 46–54. (in Chinese)

White, T.J., Bruns, T., Lee, S., Taylor, J. 1990 Amplification and direct sequencing of fungal ribosomal RNA genes for phylogenetics. In: Innis, M.A., D.H. Gelfand, J.J. Sninsky, and T.J. White (eds.), PCR Protocols: A Guide to Methods and Applications, pp. 315–322. Academic Press, San Diego.
DOI: 10.1016/B978-0-12-372180-8.50042-1View Article Google Scholar