Abstract
Carex maolanensis, a new species of Cyperaceae is described and illustrated from Guizhou, China. The new species belongs to sect. Decorae, and it is similar to C. jizhuangensis, but differs in having short rhizome, 3–7 spikes per node, terminal spikes androgynous, female glumes awned. The morphology of perigynium and achene of C. maolanensis and C. jizhuangensis is compared. According to the IUCN Red List criteria, it may be turned out to Endangered (EN) or Vulnerable (VU), however, for the present, it is better to be classified as Data Deficient (DD) because the field survey for the species is necessary. A revised identification key to the species of sect. Decorae from China is provided.
References
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<p>Deng, Y.F. (2014) <em>Carex longicolla</em> (Cyperaceae), a new sedge from China. <em>Phytotaxa</em>178 (3): 181–188. https://doi.org/10.11646/phytotaxa.178.3.3</p>
<p>Frodin, D.G. (2004) History and concepts of big plant genera. <em>Taxon</em> 53: 753–776. https://doi.org/10.2307/4135449</p>
<p>Global <em>Carex</em> Group (2015) Making <em>Carex </em>monophylectic (Cyperaceae, tribe Cariceae): a new broader circumscription. <em>Botanical Journal of the Linnean Society </em>179: 1–42. https://doi.org/10.1111/boj.12298</p>
<p>Global <em>Carex</em> Group (2016) Megaphylogenetic specimen-level approaches to the <em>Carex </em>(Cyperaceae) phylogeny using ITS, ETS and matK sequences: implications for classification. <em>Systematic Botany </em>41: 500–518. https://doi.org/10.1600/036364416X692497</p>
<p>IUCN (2012) <em>IUCN Red List Categories and Criteria: Version 3.1. </em>Second edition. Gland, Switzerland and Cambridge, UK: IUCN. iv +32 pp.</p>
<p>Jiménez-Mejías, P. & Roalson, E.H. (2016) Two new species of <em>Carex</em> (Cyperaceae) from northern South America. <em>Phytotaxa </em>266: 21–26. https://doi.org/10.11646/phytotaxa.298.3.8</p>
<p>Jin, S.H., Zhao, Y.J., Shen, T.T., Wu, D.F. & Jin, X.F. (2012a) <em>Carex tenuirostrata</em> (Cyperaceae), a new species of section <em>Confertiflorae</em> from Zhejiang, China. <em>Brittonia</em> 64: 325–329. https://doi.org/10.1007/s12228-012-9236-2</p>
<p>Jin, X.F. & Zheng, C.Z. (2010) <em>Carex yandangshanica sp. nov.</em> (Cyperaceae; <em>C.</em> sect. <em>Rhomboidales</em>) from Zhejiang, China. <em>Nordic Journal Botany </em>28: 709–712. https://doi.org/10.1111/j.1756-1051.2010.00817.x</p>
<p>Jin, X.F. & Zheng, C.Z. (2013) <em>Taxonomy of Carex section Rhomboidales (Cyperaceae).</em> Science Press, Beijing, pp. 1–237.</p>
<p>Jin, X.F., Cen, J.M., Hahn, M., Lu, Y.F. & He, J.J. (2015a) Notes on <em>Carex </em>(Cyperaceae) from China (II): a taxonomic revision of sect. <em>Radicales</em> (Kük.) Nelmes. <em>Phytotaxa</em> 217 (2): 117–132. https://doi.org/10.11646/phytotaxa.217.2.2</p>
<p>Jin, X.F., Chen, W.J. & Cen, J.M. (2015b) Notes on <em>Carex</em> (Cyperaceae) from China (III): the description offour new species. <em>Phytotaxa </em>231 (2): 165–174. https://doi.org/10.11646/phytotaxa.231.2.5</p>
<p>Jin, X.F., Simpson, D.A., Zheng, C.Z., Sun, L. & Zhang, H.W. (2012b) <em>Carex paracheniana </em>(<em>Carex</em> sect. <em>Rhomboidales</em>, Cyperaceae), a new species from Guangxi and Guizhou, China. <em>Systematic Botany</em> 37: 929–937. https://doi.org/10.1600/036364412X656617</p>
<p>Jin, X.F., Zhao, Y.J., Zheng, C.Z. & Zhang, H.W. (2011) <em>Carex zhejiangensis sp. nov.</em> (Cyperaceae) from Zhejiang, eastern China. <em>Nordic Journal Botany</em> 29: 63–70. https://doi.org/10.1111/j.1756-1051.2010.00977.x</p>
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