Asplenium quangbinhense sp. nov. and three new records of Asplenium (Aspleniaceae) from Vietnam Author Xu, Ke-Wang 0000-0003-2239-0487 xukw 10 @ njfu. edu. cn; https: // orcid. org / 0000 - 0003 - 2239 - 0487 xukw10@njfu.edu.cn Author Lu, Ngan Thi 0000-0001-9823-2018 Department of Biology, Vietnam National Museum of Nature, Vietnam Academy of Science and Technology, 18 th Hoang Quoc Viet Road, Ha Noi, Vietnam; & vnmngan @ gmail. com; https: // orcid. org / 0000 - 0001 - 9823 - 2018 vnmngan@gmail.com Author Zhou, Xin-Mao 0000-0003-3555-7784 School of Ecology and Environmental Science, Yunnan University, Kunming, 650091 Yunnan, China; & xinmao. zhou @ ynu. edu. cn; https: // orcid. org / 0000 - 0003 - 3555 - 7784 xinmao.zhou@ynu.edu.cn Author Zhang, Liang 0000-0003-3784-3135 Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China; & zhangliang @ mail. kib. ac. cn; https: // orcid. org / 0000 - 0003 - 3784 - 3135 zhangliang@mail.kib.ac.cn Author Zhang, Li-Bing 0000-0002-4905-040X Missouri Botanical Garden, 4344 Shaw Blvd, St. Louis, Missouri 63110, U. S. A.; Chengdu Institute of Biology, Chinese Academy of Sciences, P. O. Box 416, Chengdu, Sichuan 610041, China. & Libing. Zhang @ mobot. org; https: // orcid. org / 0000 - 0002 - 4905 - 040 X hang@mobot.org text Phytotaxa 2021 2021-09-28 521 2 113 120 http://dx.doi.org/10.11646/phytotaxa.521.2.5 journal article 10.11646/phytotaxa.521.2.5 1179-3163 5533597 Asplenium maguanense S.Q.Liang, R.Wei & X.C.Zhang ( Figure 4 ) Type :— CHINA . Yunnan : Maguan County , Bazhai Town , Valley behind Langqiao Village , 7 April 2017 , Xian-Chun Zhang et al. 8214 ( holotype PE !) . Additional specimens examined :— VIETNAM . Ha Giang : Quan Ba District, Nghia Thuan Commune, Bat Dai Son Nature Reserve, 10 December 2013 , Li-Bing Zhang , Liang Zhang & Thi Ngan Lu 6889 ( CDBI , MO , VNMN ). Distribution :—This species is currently only known from southwestern China and northern Vietnam . Ecology :—It occurs on limestone areas under evergreen forest, at the elevation of 800–1,800 m . Note :—This species is characterized by bipinnate-pinnatifid to bipinnate-pinnatisect lamina, ultimate segment apex with short teeth, tooth length rarely longer than width, and scale apex ending in a short apical tail shorter than 0.6 mm ( Liang et al . 2019 ). Asplenium maguanense is morphologically most similar to A. coenobiale Hance (1874: 142) , both species belong to A. coenobiale complex sensu ( Liang et al . 2019 , Xu et al . 2020 ).