New orchids in the flora of Vietnam VIII (Orchidaceae: Epidendroideae, tribes Malaxideae, Neottieae and Podochileae) Author Averyanov, Leonid V. 0000-0001-8031-2925 Komarov Botanical Institute of the Russian Academy of Sciences, 2, Prof. Popov Street, 197022, St. Petersburg, Russia av_leonid@mail.ru Author Nguyen, Van Canh 0000-0001-9578-0342 Institute of Applied Technology, Thu Dau Mot University, No. 6, Tran Van On Street, Phu Hoa Ward, Thu Dau Mot City, Binh Duong Province, Vietnam nguyenvancanh@tdmu.edu.vn Author Vuong, Truong Ba 0000-0003-3452-8455 Institute of Tropical Biology, Vietnam Academy of Science and Technology, 85, Tran Quoc Toan Street, District 3, Ho Chi Minh City, Vietnam bavuong2019@yahoo.com Author Nuraliev, Maxim S. 0000-0001-8291-2633 Department of Higher Plants, Biological Faculty, M. V. Lomonosov Moscow State University, 1, 12, Leninskie Gory, 119234, Moscow, Russia & Joint Russian-Vietnamese Tropical Scientific and Technological Center, 63, Nguyen Van Huyen Street, Cau Giay District, 122000, Hanoi, Vietnam max.nuraliev@gmail.com 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 District, Hanoi, Vietnam & Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18, Hoang Quoc Viet Road, Cau Giay District, Hanoi, Vietnam nskhang@gmail.com Author Maisak, Tatiana V. 0000-0001-5919-6755 Komarov Botanical Institute of the Russian Academy of Sciences, 2, Prof. Popov Street, 197022, St. Petersburg, Russia tmaisak@mail.ru Author Yudova, Daria A. 0000-0002-3214-5795 Komarov Botanical Institute of the Russian Academy of Sciences, 2, Prof. Popov Street, 197022, St. Petersburg, Russia gloomy_lars@mail.ru Author Saidov, Nikita T. 0000-0002-3940-6628 Komarov Botanical Institute of the Russian Academy of Sciences, 2, Prof. Popov Street, 197022, St. Petersburg, Russia nick-saidov@yandex.ru Author Nguyen, Cuong Huu 0000-0003-2281-741X Vietnam National University of Forestry, Xuan Mai, Chuong My, Hanoi, Vietnam nguyenhuucuong.tvr@gmail.com Author Nong, Duy Van 0000-0002-1509-4412 Tay Nguyen Institute for Scientific Research, Vietnam Academy of Science and Technology, Da Lat, Vietnam nongvanduy07@yahoo.com.vn text Phytotaxa 2024 2024-07-02 658 1 1 49 http://dx.doi.org/10.11646/phytotaxa.658.1.1 journal article 10.11646/phytotaxa.658.1.1 1179-3163 13217417 Bulbophyllum sect. Brachyantha Bulbophyllum lasiochilum C.S.P.Parish & Rchb.f. in Reichenbach (1874: 153) , Seidenfaden & Smitinand (1961: 353), Seidenfaden (1973a: 154 , 1979: 170 ), Seidenfaden & Wood (1992: 451) , Schuiteman et al. (2008: 268) , Clayton (2017: 66) , Aung et al. (2020: 64) , Ormerod et al. (2021: 37) . ( Fig. 3 ) Type: — MYANMAR . Mon State : Mawlamyine District , C . S . P . Parish 307 ( lectotype , designated by Clayton (2017: 66) : K K000829977 photo!; isolectotype : W-R; icon. W-R 2282) . Habitat and phenology in Laos and Vietnam : —Creeping epiphyte. Primary and old secondary humid broad-leaved forests on sandstone and shale at elevation of 600–700 m a.s.l. In Laos occasional, in Vietnam very rare. Flowers in January and June. Distribution: — Vietnam : Dien Bien Province (Nam Po District). S Myanmar , Thailand , Laos , Peninsular Malaysia . Conservation status in Laos and Vietnam : —In Eastern Indochina, three distant localities of Bulbophyllum lasiochilum are known: two in Laos (provinces Khammouane and Bolikhamsai) and one in Vietnam ( Dien Bien Province ). In some of them, the species is reported to be common. However, considering the severe fragmentation of its known populations, we estimate the conservation status of the species in Laos and Vietnam as Near Threatened (NT). Notes: — Bulbophyllum lasiochilum is highly distinct for its single-flowered inflorescence, large flowers, and long-ciliate petals and lip. This species is reported here as a new record for the flora of Vietnam . In Laos , this species was previously known from a single location in Khammouane Province ( Newman et al. 2007 , Schuiteman et al. 2008 ). The localities from Laos and Vietnam reported here essentially expand the distribution area of the species in Eastern Indochina. Studied specimens:— LAOS . Bolikhamsai Province : Khamkeut District, Phone Sa At Village, around point 18°03’38”N 105°02’28”E , remnants of primary wet closed broad-leaved forest on steep slope of mountains composed with sandstone and shale at elevation of about 635 m a.s.l., creeping epiphyte on tall trees, flowers solitary, pale dull brownish, locally very common, 18 January 2009 , S. Bounphanmy, N.T. Hiep, L. Averyanov, V. Lamxay, P.K. Loc, N.Q. Hieu, LA-VN 26 ( LE LE01055688 https://en.herbariumle.ru/?t=occ&id=7352, photos LE LE01087117 https:// en.herbariumle.ru/?t=occ&id=18641, LE01122684 https://en.herbariumle.ru/?t=occ&id=94973). VIETNAM . Dien Bien Province : Nam Po District, epiphyte, flowers fragrant, petals and lip with hairy margins, 28 June 2023 , Truong Ba Vuong, BV 1817 (VNM 00070002, LE LE01253779 https://en.herbariumle.ru/?t=occ&id=211978, photos LE LE01124286 https://en.herbariumle.ru/?t=occ&id=185343).