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Scleromitrion sirayanum (Rubiaceae: Spermacoceae), a new species of the Hedyotis-Oldenlandia complex in Taiwan

摘要


The new species Scleromitrion sirayanum T.C. Hsu & Z.H. Chen (Rubiaceae) is described and illustrated from Taiwan. S. sirayanum is similar to S. angustifolium (Cham. & Schltdl.) Benth. but easily distinguished by its constantly solitary flowers, salverform corolla, adaxially basally long villous corolla lobes, spreading to ascending persistent calyx lobes, and obconic capsules dehiscent both septicidally and loculicidally into 4 valves. S. sirayanum is so far only found in Nanhua District of Tainan City and evaluated as Vulnerable based on the IUCN Red List criteria. Three new combinations are also proposed for the Hedyotis-Oldenlandia complex in Taiwan.

參考文獻


Jung, M.-J., Ku, S.-M. and Peng, C.-I. 2011. Oldenlandiopsis Terell & W. H. Lewis (Rubiaceae), a Newly Recorded Genus in Taiwan. Taiwania 56(1): 58–61. https://dx.doi.org/10.6165/tai.2011.56(1).58
Chen, S.-H., Su, J.-Y. and Wu, M.-J. 2010. Hedyotis pinifolia Wall. ex G. Don (Rubiaceae), a New Record to the Flora of Taiwan. Taiwania 55(1): 86–89.https://dx.doi.org/10.6165/tai.2010.55(1).86
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Guo, X., Wang, R. J., Simmons, M. P., But, P. P. H. & Yu, J. 2013. Phylogeny of the Asian Hedyotis-Oldenlandia complex (Spermacoceae, Rubiaceae): Evidence for high levels of polyphyly and the parallel evolution of diplophragmous capsules. Molec. Phylogen. Evol. 67(1): 110–122.https://dx.doi.org/10.1016/j.ympev.2013.01.006
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