The checklist of Raphiocarpus species (Gesneriaceae, Didymocarpinae) in the flora of Vietnam with the description of a new species, R. bicallosus Author Nguyen, Cuong Huu 0000-0003-2281-741X Vietnam National University of Forestry, Xuan Mai, Chuong My, Ha Noi, Vietnam & nguyenhuucuong. tvr @ gmail. com; https: // orcid. org / 0000 - 0003 - 2281 - 741 X nguyenhuucuong.tvr@gmail.com Author Wen, Fang 0000-0002-3889-8835 Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Gesneriad Conservation Center of China, Guangxi Institute of Botany, CN- 541006 Guilin, China & wenfang 760608 @ 139. com; https: // orcid. org / 0000 - 0002 - 3889 - 8835 Author Pham, Toai Minh 0000-0002-1033-4237 Vietnam National University of Forestry, Xuan Mai, Chuong My, Ha Noi, Vietnam & toaipm @ vnuf. edu. vn; https: // orcid. org / 0000 - 0002 - 1033 - 4237 toaipm@vnuf.edu.vn Author Nguyen, Yen Thi 0000-0001-9606-3564 Vietnam National University of Forestry, Xuan Mai, Chuong My, Ha Noi, Vietnam & yennt @ vnuf. edu. vn; https: // orcid. org / 0000 - 0001 - 9606 - 3564 yennt@vnuf.edu.vn Author Bui, Thanh Minh 0009-0006-5514-1291 Vietnam National University of Forestry, Xuan Mai, Chuong My, Ha Noi, Vietnam & minhthanh 211202 @ gmail. com; https: // orcid. org / 0009 - 0006 - 5514 - 1291 minhthanh211202@gmail.com Author Bui, Doi The 0000-0003-3689-6200 Vietnam National University of Forestry, Xuan Mai, Chuong My, Ha Noi, Vietnam & doibt @ vnuf. edu. vn; https: // orcid. org / 0000 - 0003 - 3689 - 6200 doibt@vnuf.edu.vn Author Nguyen, Khang Sinh 0000-0001-5171-4140 Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, 100000, Vietnam & nskhang @ iebr. vast. vn; https: // orcid. org / 0000 - 0001 - 5171 - 4140 nskhang@iebr.vast.vn Author Averyanov, Leonid V. 0000-0001-8031-2925 Komarov Botanical Institute Russian Academy of Sciences, Prof. Popov str., 2, St. Petersburg, 197376, Russia & av _ leonid @ mail. ru; https: // orcid. org / 0000 - 0001 - 8031 - 2925 av_leonid@mail.ru text Phytotaxa 2023 2023-09-28 616 3 223 234 https://phytotaxa.mapress.com/pt/article/download/phytotaxa.616.3.2/51139 journal article 276800 10.11646/phytotaxa.616.3.2 0561631c-f602-4de3-8c60-a8fe630a05dd 1179-3163 10084863 8. Raphiocarpus taygiangensis C.H.Nguyen, K.S.Nguyen & Aver. in Nguyen et al. (2023: 21) . Type: — VIETNAM . Quang Nam : Tay Giang District , A Xan Village , 1270 m , around point 15°48’57”N 107°19’47”E , 20 April 2022 , C .H. Nguyen et al. CKH 2022042068 ( holotype VNF , isotypes HN , LE !) Distribution :—The species is endemic to Vietnam , known on the basis of the only type collection in Quang Nam Province . Ecology and phenology :—It grows in evergreen broad-leaved submontane forests on granite and shale at elevations of about 1300 m a.s.l. Flowers in April–May. Conservation status :—Up to date, only one population of this species is currently known. Considering the small population size (less than 500 mature individuals growing on an area less than 5 km 2 ) and fragile habitat, the species conservation status was preliminarily assessed as Vulnerable (VU D2) according to the criteria of IUCN 2023 ( Nguyen et al. 2023 ). No additional data become available since this assessment.