taxonID	type	description	language	source
039F87B94322FFEEFF6D53D3B46B74F8.taxon	materials_examined	Type: — VIETNAM. Lang Son Province: Chi Lang district, 14 September 1964, Quy 72 (HN). Notes: — This species is similar to Leptochilus dissimilialatus (Bonaparte 1923: 155) Liang Zhang & Li Bing Zhang in having pinnatifid fertile leaves, but differs from the latter in having smaller habit and simple sterile leaves with entire margins. This fern is endemic to karst regions of northern Vietnam. The species was not sampled in our molecular phylogeny of Leptochilus (Zhang et al., 2018) and it is recognized here based on the morphology. The elliptic and deeply pinnatifid fertile leaves support it as a member of the L. ellipticus clade.	en	Zhang, Liang, Guo, Lei, Zhang, Li-Bing (2018): New combinations in the fern genus Leptochilus (Polypodiaceae). Phytotaxa 374 (2): 172-176, DOI: 10.11646/phytotaxa.374.2.10, URL: http://dx.doi.org/10.11646/phytotaxa.374.2.10
039F87B94323FFEEFF6D542DB77A76F0.taxon	materials_examined	Type: — VIETNAM. Province unknown: “ Tonkin, ” 9 January 1884, Bon 2395 (holotype P- 0626870!, isotypes BM- 001054009; P- 0626869!). Notes: — When this species is transferred to Leptochilus, a new combination based on Colysis bonii Ching is blocked by Leptochilus bonii (Christ 1904: 610) C. Christensen (1906: 384). The new epithet is in honor of the late professor Ren-Chang Ching, one of the best renowned pteridologists, who carried out some carefully morphological studies on Colysis. This fern is most close to Leptochilus pedunculatus (Hooker & Greville 1827: TAB IV) Fraser-Jenkins (2008: 62), but differs from the latter in having leaves narrowly lanceolate, base shortly attenuate (Ching 1933), petioles shorter than or as long as laminae. This species was resolved in the Leptochilus ellipticus clade as sister to a clade containing four samples similar to L. pedunculatus (Zhang et al., 2018).	en	Zhang, Liang, Guo, Lei, Zhang, Li-Bing (2018): New combinations in the fern genus Leptochilus (Polypodiaceae). Phytotaxa 374 (2): 172-176, DOI: 10.11646/phytotaxa.374.2.10, URL: http://dx.doi.org/10.11646/phytotaxa.374.2.10
039F87B94323FFEEFF6D5625B6D87130.taxon	materials_examined	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.	en	Zhang, Liang, Guo, Lei, Zhang, Li-Bing (2018): New combinations in the fern genus Leptochilus (Polypodiaceae). Phytotaxa 374 (2): 172-176, DOI: 10.11646/phytotaxa.374.2.10, URL: http://dx.doi.org/10.11646/phytotaxa.374.2.10
039F87B94323FFEEFF6D5065B5AD72CD.taxon	materials_examined	Type: — VIETNAM. Lam Dong Province: Dalat, 17 December 1924, Evrard 2250 (lectotype P- 00709509!; here designated). Notes: — When Colysis evrardii was published, both Evrard 2250 and Evrard 1921 were cited without designating its type. This fern is similar to Leptochilus decurrens Blume (1828: 206), but differs from the latter in having narrower sterile leaves and wider fertile leaves. It is also similar to Colysis diversifolia W. M. Zhu (1979: 93) and Leptochilus × beddomei (Manickam & Irudayaraj 1997: 267) X. C. Zhang & Nooteboom (2013: 834) in having narrowly lanceolate fertile leaves with interrupted sori. However, the large leaves of L. evrardii are sterile, while the large leaves of Colysis diversifolia and Leptochilus × beddomei often have irregularly scattered sori. The species was resolved as a member of the Colysis clade (Zhang et al. 2018), and is most closely related to L. decurrens.	en	Zhang, Liang, Guo, Lei, Zhang, Li-Bing (2018): New combinations in the fern genus Leptochilus (Polypodiaceae). Phytotaxa 374 (2): 172-176, DOI: 10.11646/phytotaxa.374.2.10, URL: http://dx.doi.org/10.11646/phytotaxa.374.2.10
039F87B94323FFEDFF6D5231B1FD7500.taxon	materials_examined	Type: — MALAYSIA. Sarawak: ’ Borneo. Zwischen Batu Babi und Lumowia’, 10 July 1908, Winkler 2830 (holotype B- 200087499!; isotype L- 0051793!). Notes: — The species was treated as a variety of Leptochilus macrophyllus (1997: 286), or a synonym of L. pedunculatus (Zhang & Nooteboom 2013). However, it differs from the latter two in having leaves strong dimorphic, fertile leaves 2 – 3 times longer than sterile leaves, petioles the same length as or much longer than laminae, laminae thin-herbaceous. Our recent molecular study of Leptochilus did not sample this species. Based on the distinctly dimorphic leaves and the distribution of the species, we assume that it is a member of the L. macrophyllus clade.	en	Zhang, Liang, Guo, Lei, Zhang, Li-Bing (2018): New combinations in the fern genus Leptochilus (Polypodiaceae). Phytotaxa 374 (2): 172-176, DOI: 10.11646/phytotaxa.374.2.10, URL: http://dx.doi.org/10.11646/phytotaxa.374.2.10
039F87B94320FFEDFF6D5475B03D7738.taxon	materials_examined	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.	en	Zhang, Liang, Guo, Lei, Zhang, Li-Bing (2018): New combinations in the fern genus Leptochilus (Polypodiaceae). Phytotaxa 374 (2): 172-176, DOI: 10.11646/phytotaxa.374.2.10, URL: http://dx.doi.org/10.11646/phytotaxa.374.2.10
039F87B94320FFEDFF6D566DB77E711C.taxon	description	Notes: — This species is endemic to southern Yunnan, and was often treated as a synonym or a variety of Leptochilus ellipticus (e. g., Nooteboom, 1997; Zhang & Nooteboom, 2013), which is not supported by our phylogenetic analyses (Zhang et al., 2018). This fern is most similar to L. pothifolius (Buchanan-Hamilton ex D. Don 1825: 13) Fraser-Jenkins (2008: 181) by having 1 – 3 (4) pairs of large lobes, lobes up to 4 cm wide, but differs from the latter in having narrowly winged rachis. The species was resolved as an isolated clade in Leptochilus. Its sister relationship with the Colysis clade was poorly supported (Zhang et al. 2018).	en	Zhang, Liang, Guo, Lei, Zhang, Li-Bing (2018): New combinations in the fern genus Leptochilus (Polypodiaceae). Phytotaxa 374 (2): 172-176, DOI: 10.11646/phytotaxa.374.2.10, URL: http://dx.doi.org/10.11646/phytotaxa.374.2.10
039F87B94320FFEDFF6D5041B7D37258.taxon	materials_examined	Type: — VIETNAM. Phu Hu Province: de Nhatrang, 19 January 1923, Poilane 5373 (lectotype BM 000036782!; here designated!). Notes: — This fern is similar to Leptochilus evrardii and L. decurrens in having strongly dimorphic leaves, but differs from them in having both sterile and fertile leaves irregularly lobed. The species was not included in our molecular phylogeny of Leptochilus but should be a member of the Colysis clade based on its strongly dimorphic leaves.	en	Zhang, Liang, Guo, Lei, Zhang, Li-Bing (2018): New combinations in the fern genus Leptochilus (Polypodiaceae). Phytotaxa 374 (2): 172-176, DOI: 10.11646/phytotaxa.374.2.10, URL: http://dx.doi.org/10.11646/phytotaxa.374.2.10
039F87B94320FFEDFF6D538DB45A7C08.taxon	materials_examined	Type: — CHINA. Guangxi: Napo County, Nonghua, elev. 1100 m, Hougao Zhou 2605 (holotype in GXAC; isotypes in PYU). Notes: — The species was treated as a synonym of Leptochilus pedunculatus (Zhang & Nooteboom 2013), but differs later in having monomorphic leaves, lamina base slightly lobed. The species is most similar to L. × hemitomus (Hance 1883: 269) Nooteboom (1997: 293), differs later in having lamina base cordate, lower lamina margins slightly lobed or entire, and laminae chartaceous. This rare fern occurs in limestone mountains in Guangxi Province of southern China and Bac Kan Province of northern Vietnam. The species was resolved much more closely related to Leptochilus dissimilialatus and L. flexilobus than to L. hemitomus.	en	Zhang, Liang, Guo, Lei, Zhang, Li-Bing (2018): New combinations in the fern genus Leptochilus (Polypodiaceae). Phytotaxa 374 (2): 172-176, DOI: 10.11646/phytotaxa.374.2.10, URL: http://dx.doi.org/10.11646/phytotaxa.374.2.10
