New combinations in the fern genus Leptochilus (Polypodiaceae) Author Zhang, Liang CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China. & Southeast Asia Biodiversity Research Institute, Chinese Academy of Sciences, Yezin, Nay Pyi Taw 05282, Myanmar. Author Guo, Lei CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China. & University of Chinese Academy of Sciences, Beijing 100049, China Author Zhang, Li-Bing Missouri Botanical Garden, 4344 Shaw Blvd., St. Louis, Missouri 63110, U. S. A.; Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, Sichuan, Chian. text Phytotaxa 2018 2018-11-05 374 2 172 176 http://dx.doi.org/10.11646/phytotaxa.374.2.10 journal article 10.11646/phytotaxa.374.2.10 1179-3163 Leptochilus flexilobus (Christ) Liang Zhang & Li Bing Zhang , comb. nov. Basionym: Polypodium flexilobum Christ (1904: 107) . ≡ Colysis elliptica var. flexiloba (Christ) L. Shi & X.C. Zhang (1999: 74) , C . flexiloba (Christ) Ching (1933: 330) , Leptochilus ellipticus var. flexilobus (Christ) X. C. Zhang (2012: 652) . Type:— CHINA . Yunnan Province : Mengzhi County, Henry 10769 A ( holotype K-000959637!). Notes:—This species was often treated as a synonym or a variety of Leptochilus ellipticus (e.g., Nooteboom 1997 , Cheng et al. 2005 , Zhang & Nooteboom 2013 ). However, our reconstructed phylogeny indicated that this species is more closely related to L. dissimilialatum and L. digitatus (1997: 282) than to L. ellipticus ( Zhang et al. , 2018 ) . Leptochilus flexilobus is distinguished in the genus by having rachis broadly winged and margins of pinnae often undulate-repand. It might occur in southern China and northern Vietnam only. The species is apparently a member of the L. ellipticus clade ( Zhang et al. 2018 ). In addition to L. dissimilialatus , the species is also similar to some species with entire to irregularly lobed leaves, e.g., L. hemitomus , L. wrightii .