Bulbophyllum section Rhytionanthos (Orchidaceae) in Vietnam with description of new taxa and new national record Author Dang, Minh Quan 0000-0002-0613-8532 School of Education, Can Tho University, 3 / 2 Street, Ninh Kieu District, Can Tho City, Vietnam. & dmquan @ ctu. edu. vn; https: // orcid. org / 0000 - 0002 - 0613 - 8532 dmquan@ctu.edu.vn Author Averyanov, Leonid V. Author Dang, Van Son 0000-0001-8681-4141 Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay District, Hanoi, Vietnam & Institute of Tropical Biology Vietnam Academy of Science and Technology, 85 Tran Quoc Toan, District 3, Ho Chi Minh City, Vietnam & dvsonitb @ gmail. com; https: // orcid. org / 0000 - 0001 - 8681 - 4141 dvsonitb@gmail.com Author Maisak, Tatiana 0000-0001-5919-6755 Komarov Botanical Institute of the Russian Academy of Sciences, Prof. Popov Street 2, 197376, St. Petersburg, Russia & tmaisak @ mail. ru; https: // orcid. org / 0000 - 0001 - 5919 - 6755 tmaisak@mail.ru Author Bui, Van Huong 0000-0002-6219-1055 Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay District, Hanoi, Vietnam & Vietnam National Museum of Nature, Vietnam Academy of Science and Technology, 18, Hoang Quoc Viet Road, Cau Giay District, Hanoi, Vietnam & bvhuong 90 @ gmail. com; https: // orcid. org / 0000 - 0002 - 6219 - 1055 bvhuong90@gmail.com Author Tu, Bao Ngan 0000-0001-6971-3111 The Faculty of Chemistry and Biology, University Grenoble Alpes & Department of Biosciences, University of Milan & baongan. botany @ gmail. com; https: // orcid. org / 0000 - 0001 - 6971 - 3111 baongan.botany@gmail.com Author Truong, Ba Vuong 0000-0003-3452-8455 Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay District, Hanoi, Vietnam & Institute of Tropical Biology Vietnam Academy of Science and Technology, 85 Tran Quoc Toan, District 3, Ho Chi Minh City, Vietnam & bavuong 2019 @ yahoo. com; https: // orcid. org / 0000 - 0003 - 3452 - 8455 bavuong2019@yahoo.com text Phytotaxa 2022 2022-01-11 530 3 257 270 journal article 2663 10.11646/phytotaxa.530.3.1 72c8c74a-e501-43e1-ab1e-d21ece04d26f 1179-3163 5835973 7. B. taeniophyllum Parish & Reichenbach (1874a: 198) ; Seidenfaden (1979: 167 , 1992: 285 ). Type : — MYANMAR , Mawlamyine (Moulmein), Parish 346 (W-Herb. Reichenbach) . ≡ Cirrhopetalum taeniophyllum (Parish & Reichenbach 1874a: 198 ) Hooker (1890: 786) ; Phyllorkis taeniophylla (Parish & Reichenbach) Kuntze (1891: 677) . = Bulbophyllum simillimum Parish & Reichenbach (1878b: 49) ; Cirrhopetalum simillimum Reichenbach (1878b: 50) ; Phyllorkis simillima (Reichenbach) Kuntze (1891: 677) . Type :— MYANMAR , July 1873 , Parish, E.C. 366 (K000829941 http://specimens.kew.org/ herbarium/K000829941 photo!). = Cirrhopetalum mundulum Bull (1891: 676) ; Bulbophyllum mundulum (Bull) Smith. (1912: 26) . Type :—UNKNOWN ORIGIN, Ex. Hort. Mansell & Hatcher, Ltd., Anon s.n. (BM000525174 https://data.nhm.ac.uk/object/518b076b-6e8f-420e-a584-3d01071b607b photo!). = Bulbophyllum rupicola Ridley (1911: 194) . Type :—sine loc., C.E. Carr, s.n ( SING0046985 http://plants.jstor.org/stable/10.5555/al.ap. specimen.sing0046985 photo!). = Bulbophyllum punctatissimum Ridley (1924: 77) ; Cirrhopetalum punctatissimum Rolfe ex Ridley (1924: 77) . Type :— MALAY PENINSULA , “sent alive to KEW by Mr. E . Seimund in 1914 and flowered shortly after” August 1919 . Seimund 337-14 ( K000891078 http://specimens.kew.org/herbarium/ K000891078 photo!) . Notes:—In Vietnam , this species is presented by two varieties. The key for their identification is presented below.