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 cyrtosorum K.W.Xu, Li Bing Zhang & W.B.Liao ( Figure 3 ) Type :— CHINA . Yunnan : Pu’er City , Pu’er Sun River National Forest Park, elev. ca. 1200 m , 22°34’51.74”N , 101°6’31.57”E , 20 April 2017 , Ke-Wang Xu & Lei Jiang XKW318 ( holotype SYS !) . Additional specimens examined :— CHINA . Yunnan : Pu’er City, Pu’er Sun River National Park, elev. ca. 1200 m , 22°34’51.74”N , 101°6’31.57”E , 18 May 2016 , Lei Jiang & Hua Peng JL00363 ( SYS ). VIETNAM . Quang Binh : Minh Hoa district, Dan Hoa Commune, Chalo village, 600 m , 17°40’26.43”N , 105°46’39.19”E , 13 November 2014 , Li-Bing Zhang , Liang Zhang & Ngan Thi Lu 7440 ( MO ); Dak Nong : Dak Glong district, Dak P’lao Commune, Ta Dung Nature Reserve, 1200–1400 m , 11°52’17.98”N , 108°1’36.98”E , 13 November 2006 , Su-Kong Wu et al. WP1557 (MO-5959537). Distribution :—Currently only known from southwestern China and Vietnam . Ecology :—This species grows in broad-leaved forests. It is a lithophyte on rocks in humid and shady conditions. Note :—One population of 40–50 individuals was first found in China and it was classified as Critically Endangered according to the IUCN guidelines ( Xu et al. 2018a ). Two small populations were found in Vietnam , in Quang Binh and Dak Nong , respectively. Morphologically, plants from Vietnam are more robust than those from China .