Bulbophyllum kanburiense Seidenfaden 1970

5. B. kanburiense Seidenfaden (1970: 344), Seidenfaden (1979: 190), Ormerod et al. (2021: 36). Type: — THAILAND, Thawng Phaphum, Kanburi, Seidenfaden & Smitinand, GT 4259 (C). ≡ Tripudianthes kanburiensis (Seidenfaden) Szlachetko & Kras (2007: 95). Habitat and phenology: —Epiphyte on tall trees in primary evergreen broad-leaved forests. Distribution: — Myanmar, Thailand, Vietnam (?) Proposed conservation status:—According to currently available data, the occurrence of B. kanburiense in Vietnam is unclear. More field studies are required to confirm the distribution of this species in Vietnam. In view of lack of current data and in accordance with IUCN criteria (IUCN, 2022), the species is assessed nationally as Data Deficient (DD). The conservation status of this species outside Vietnam has not been evaluated yet. Studied specimens:— MYANMAR, 1932, Dickason 5770, (A02386360 photo!,AMES45519photo!). VIETNAM, Lam Dong, 1982, Averyanov, LX-VN 973 (photos LE01055686!, LE01055687!). Note:—This species is similar to B. refractum, from which it differs by having a smaller median sepal, less than 5.5 mm long (vs. median sepal longer than 8 mm), shorter lateral sepals 2.5 cm (vs. longer than 3 cm), and acuminate petals (vs. petals acute). Two collections housed in LE Herbarium: LE01055686 and LE01055687 identified as B. kanburiense show entire dorsal sepal and subulate petals typical for B. refractum according to Seidenfaden (1992: 261). However, these specimens have lateral sepals 3.5–4 cm long (vs. median sepal of B. kanburiense according to protologue is about 2.5 cm long), hence the identification of mentioned collection remains somewhat doubtful. We have not seen any more collections from Vietnam, which can confirm the occurrence of B. refractum in Vietnam.
Published as part of Nguyen, Van Canh, Averyanov, Leonid V., Maisak, Tatiana V., Nguyen, Thi Lien Thuong, Nguyen, Van Khuong, Pham, Thi Thanh Dat, Nguyen, Danh Duc, Dang, Van Son, Aromyen, Warapong & Truong, Ba Vuong, 2023, The review of Bulbophyllum section Tripudianthes (Orchidaceae) in the flora of Vietnam with the description of new species, B. viridipallidum, pp. 59-68 in Phytotaxa 598 (1) on page 67, DOI: 10.11646/phytotaxa.598.1.4, http://zenodo.org/record/7958804
{"references":["Seidenfaden, G. (1970) Contributions to the Orchid Flora of Thailand II. Botanisk Tidsskrift 65 (4): 313 - 370.","Seidenfaden, G. (1979) Orchid genera in Thailand 8: Bulbophyllum. Dansk Botanisk Arkiv 33 (3): 1 - 228.","Ormerod, P, Kurzweil, H. & Watthana, S. (2021) Annotated List of Orchidaceae for Myanmar. Phytotaxa 481 (1): 1 - 262. https: // doi. org / 10.11646 / phytotaxa. 481.1.1","Szlachetko, D. L. & Kras, M. (2007) Contribution a la revision generique de Bulbophyllinae (Epidendroideae) 5 - Tripudianthes (Seidenfaden). Richardiana 7: 94 - 96.","IUCN Standards and Petitions Committee (2022) Guidelines for Using the IUCN Red List Categories and Criteria. Version 15.1. Prepared by the Standards and Petitions Committee. Available from: https: // nc. iucnredlist. org / redlist / content / attachment _ files / RedListGuidelines. pdf (accessed 2 April 2023)","Seidenfaden, G. (1992) The Orchid of Indochina. Opera Botanica 114: 1 - 502."]}