199 ADANSONIA, sér. 3  2016  38 (2) © Publications Scientifiques du Muséum national d’Histoire naturelle, Paris. www.adansonia.com KEY WORDS Cambodia, Laos, Vietnam, flora, nature conservation, lectotypification, new synonyms. Averyanov L. V., Ponert J., Nguyen P. T., Duy N. V., Khang N. S. & Nguyen V. C. 2016. — A survey of Dendrobium Sw. sect. Formosae (Benth. & Hook.f.) Hook.f. in Cambodia, Laos and Vietnam. Adansonia, sér. 3, 38 (2): 199-217. https:// doi.org/10.5252/a2016n2a5 ABSTRACT Tis taxonomic survey of Dendrobium section Formosae in the flora of Cambodia, Laos and Vietnam includes 19 species (Dendrobium bellatulum Rolfe, D. cariniferum Rchb.f., D. chapaense Aver., D. christya- num Rchb.f., D. daklakense Tich, Schuit. & J.J.Verm., D. draconis Rchb.f., D. infundibulum Lindl., D. kontumense Gagnep., D. longicornu Lindl., D. multilineatum, D. ochraceum De Wild., D. roseiodo- rum Sathap., T.Yukawa & Seelanan, D. scabrilingue Lindl., D. senile E.C.Parish & Rchb.f., D. suzukii T.Yukawa, D. trankimianum T.Yukawa, D. trigonopus Rchb.f., D. wattii (Hook.f.) Rchb.f., D. william- sonii Day & Rchb.f.) hitherto recorded from these countries. It includes a key for species identification and updated information on species nomenclature, morphology, phenology, ecology, distribution and tentative conservation status. Leonid V. AVERYANOV Komarov Botanical Institute, Russian Academy of Science, St. Petersburg, Prof. Popov Str. 2, 197376 (Russia) av_leonid@mail.ru av_leonid@yahoo.com Jan PONERT Prague Botanical Garden, Trojska 800/196, Prague 7 – Troja, 171 00 (Czech Republic) and Department of Experimental Plant Biology, Charles University, Faculty of Science, Vinicna 5, 128 48, Prague 2 (Czech Republic) ponert@natur.cuni.cz Phi Tam NGUYEN Viet Nam Post and Telecommunications Group – VNPT Lam Dong, 8 Tran Phu Street, Da Lat City, Lam Dong Province (Vietnam) phitam77@gmail.com Nong Van DUY Tay Nguyen Institute for Scientific Research, Vietnam Academy of Science and Technology, 116 Xo Viet Nghe Tinh St., Da Lat City, Lam Dong (Vietnam) nongvanduy07@yahoo.com.vn Nguyen Sinh KHANG Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi (Vietnam) khangnguyensinh@yahoo.com Van Canh NGUYEN 3/12/3 Vo Van Kiet street, Buon Ma Thuot City, Dak Lak province (Vietnam) nguyenvancanh@gmail.com Published on 30 December 2016 A survey of Dendrobium Sw. sect. Formosae (Benth. & Hook.f.) Hook.f. in Cambodia, Laos and Vietnam