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 dissimilialatus (Bonap.) Liang Zhang & Li Bing Zhang , comb. nov. Basionym: Polypodium dissimilialatum Bonaparte (1923: 155) . ≡ Colysis dissimilialata (Bonap.) Ching (1933: 330) . Type :— VIETNAM . Lào Cai Province : September 1919 , Eberhardt 5097 ( lectotype P-00709503!, isolectotype BM-001038414!; here designated !) . Notes:—When Polypodium dissimilialatum was published, both Eberhardt 5097 and Eberhardt 5115 were cited without designating type specimen. This species is similar to Leptochilus ellipticus (Thunberg ex Murray 1784: 935 ) Nooteboom (1997: 283) , but differs from the latter in having leaves distinct dimorphic, fertile leaves with lobes of more than 10 pairs, lobes narrow and long with large space each other. Colysis morsei ( Ching 1931: 17 ) Ching (1933: 330) is endemic to southern Guangxi , China , which may be conspecific with L. dissimilialatum . This rare fern occurs in limestone mountains in northern Vietnam . Our reconstructed phylogeny resolved three samples of Leptochilus dissimilialatus as sister to a clade formed by four samples of L. flexilobus , but weakly supported. Given the morphological difference between L. dissimilialatum and L. flexilobus mentioned above, we recognize both of the species.