Skip to main content Skip to main navigation menu Skip to site footer
Responsive image
Issue: Vol. 620 No. 1: 12 Oct. 2023
Type: Article
Published: 2023-10-12
DOI: 10.11646/phytotaxa.620.1.2
Page range: 18-32
Abstract views: 150
PDF downloaded: 12

The mycoheterotrophic genus Didymoplexiella (Orchidaceae) in Cambodia, Laos and Vietnam

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; 122000 Hanoi; Vietnam.
Komarov Botanical Institute of the Russian Academy of Sciences; 2 Prof. Popov street; 197376 St. Petersburg; Russia.
Institute of Ecology and Biological Resources; Vietnam Academy of Science and Technology; 18 Hoang Quoc Viet Road; Cau Giay; Hanoi; Vietnam. Graduate University of Science and Technology; Vietnam Academy of Science and Technology; 18 Hoang Quoc Viet Road; Cau Giay; Hanoi; Vietnam.
Vietnam National University of Forestry; Xuan Mai; Chuong My; Hanoi; Vietnam.
Mien Trung Institute for Scientific Research; Vietnam National Museum of Nature; Vietnam Academy of Science and Technology; 321 Huynh Thuc Khang street; Thua Thien Hue; Vietnam.
Komarov Botanical Institute of the Russian Academy of Sciences; 2 Prof. Popov street; 197376 St. Petersburg; Russia.
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; 122000 Hanoi; Vietnam.
Joint Russian-Vietnamese Tropical Scientific and Technological Center; 63 Nguyen Van Huyen street; Cau Giay; 122000 Hanoi; Vietnam. A.N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences; 33 Leninsky avenue; 119071 Moscow; Russia.
Joint Russian-Vietnamese Tropical Scientific and Technological Center; 63 Nguyen Van Huyen street; Cau Giay; 122000 Hanoi; Vietnam.
achlorophyllous plants Eastern Indochina flora new national record orchids plant diversity plant taxonomy Thailand Monocots

Abstract

A synopsis of the orchid genus Didymoplexiella is presented for Cambodia, Laos and Vietnam. Uncertainties in morphological delimitation of the species of Didymoplexiella are addressed in the context of the new data on variation of labellum structure; re-identification of a considerable number of specimens is performed in accordance with the current views. Three species are recognised in the study area. Of them, D. laosensis is endemic to Laos and Vietnam; D. ornata is known from Vietnam and also widely distributed in Malesia; and D. siamensis inhabits all three countries of Eastern Indochina and also Thailand, Japan, China and Taiwan. Didymoplexiella laosensis is newly recorded for Vietnam, whereas D. trichechus is excluded from the known flora of Eastern Indochina, and D. ornata is excluded from the flora of Laos. Typification of D. siamensis is revised. For each species, the type, synonyms (where applicable), citations of relevant regional taxonomic publications, brief taxonomic notes, data on ecology, phenology, distribution and IUCN preliminary assessment are provided. The geographical distribution of the species of Didymoplexiella in Cambodia, Laos and Vietnam is shown on a map. A key for the identification of D. laosensis, D. ornata, D. siamensis and D. trichechus is presented.

 

References

  1. Averyanov, L.V. (2006) Rare species of orchids (Orchidaceae) in the flora of Vietnam. Turczaninowia 9 (3): 48–89.
  2. Averyanov, L.V. (2010) Three new species of orchids (Orchidaceae) from Vietnam. Taiwania 55 (2): 91–98. https://doi.org/10.6165/tai.2010.55(2).91
  3. Averyanov, L.V. (2011) The orchids of Vietnam. Illustrated survey. Part 3. Subfamily Epidendroideae (primitive tribes—Neottieae, Vanilleae, Gastrodieae, Nervilieae). Turczaninowia 14 (2): 15–100.
  4. Averyanov, L.V. (2012) New orchid taxa and records in the flora of Vietnam. Taiwania 57 (2): 127–152. https://doi.org/10.6165/tai.2012.57(2).127
  5. Averyanov, L.V. (2013) The orchids of Vietnam. Illustrated survey. Part 4. Subfamily Epidendroideae (tribes—Arethuseae and Malaxideae). Turczaninowia 16 (1): 5–163. https://doi.org/10.14258/turczaninowia.16.4.7
  6. Averyanov, L.V. & Averyanova, A.L. (2002) Rare species of orchids (Orchidaceae) in the flora of Vietnam. Turczaninowia 5 (4): 49–108.
  7. Averyanov, L.V. & Averyanova, A.L. (2003) Updated checklist of the orchids of Vietnam. Vietnam National University Publishing House, Hanoi, 102 pp.
  8. Averyanov, L.V., Nguyen, K.S., Maisak, T.V., Nguyen, H.T., Orlov, N.L., Slastunov, D.D. & Sokolova, I.V. (2019a) New orchid species (Orchidaceae) in the flora of Laos. Novitates Systematicae Plantarum Vascularium 50: 25–40. https://doi.org/10.31111/novitates/2019.50.25
  9. Averyanov, L.V., Nguyen, K.S. & Maisak, T.V. (2019b) Plant diversity, flora and vegetation of Hin Nam No protected area. Lambert Academic Publishing, Saarbrucken, 431 pp.
  10. Averyanov, L.V., Maisak, T.V., Lyskov, D.F., Kuznetsov, A.N., Kuznetsova, S.P. & Nuraliev, M.S. (2022) Didymoplexis gibbosa (Orchidaceae), a new mycoheterotrophic species from southern Vietnam. Phytotaxa 556 (2): 207–212. https://doi.org/10.11646/phytotaxa.556.2.11
  11. Chase, M.W., Cameron, K.M., Freudenstein, J.V., Pridgeon, A.M., Salazar, G., Van den Berg, C. & Schuiteman, A. (2015) An updated classification of Orchidaceae. Botanical journal of the Linnean Society 177 (2): 151–174. https://doi.org/10.1111/boj.12234
  12. Chen, S.C., Liu, Z.J., Zhu, G.H., Lang, K.Y., Ji, Z.H., Luo, Y.B., Jin, X.H., Cribb, P.J., Wood, J.J., Gale, S.W., Ormerod, P., Vermeulen, J.J., Wood, H.P., Clayton, D. & Bell, A. (2009) Orchidaceae. In: Wu, Z.Y., Raven, P.H. & Hong, D. (Eds.) Flora of China, vol. 25. Science Press, Beijing & Missouri Botanical Garden Press, St. Louis, pp. 211–235.
  13. Downie, D.G. (1925) Contributions to flora of Siam. Additamentum XVII. Bulletin of Miscellaneous Information (Royal Botanic Gardens, Kew) 1925 (10): 404–423. https://doi.org/10.2307/4115102
  14. Gale, S., Kumar, P., Phaxaysombath, T. (2018) A guide to orchids of Laos. Natural History Publications, Kota Kinabalu and Kadoorie Farm & Botanic Garden, Hong Kong, 204 pp.
  15. Garay, L.A. (1954) Notatio orchidologica 3. Archivos do Jardim Botânico do Rio de Janeiro 13: 31–54.
  16. Govaerts, R., Bernet, P., Kratochvil, K., Gerlach, G., Carr, G., Alrich, P., Pridgeon, A.M., Pfahl, J., Campacci, M.A., Holland Baptista, D., Tigges, H., Shaw, J., Cribb, P., George, A., Kreuz, K. & Wood, J. (2023) Orchidaceae. In: POWO: Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; Available from: http://www.plantsoftheworldonline.org/ (accessed 12 July 2023).
  17. Griffith, W. (1844) On some plants, mostly undescribed, in the H.C. Botanic Gardens, Calcutta. Calcutta Journal of Natural History 4: 375–390. [https://www.biodiversitylibrary.org/item/176237#page/415/mode/1up]
  18. Holttum, R.E. (1964) A revised flora of Malaya. I. Orchids of Malaya. 3rd ed. Government Printing Office, Singapore, 759 pp.
  19. Hu, A.Q., Gale, S.W., Kumar, P., Fischer, G. & Pang, K.S. (2014) Taxonomic notes on Didymoplexiella siamensis and Gastrodia peichatieniana, two fully mycoheterotrophic orchids new to the flora of Hong Kong. Annales Botanici Fennici 51 (3): 177–184. https://doi.org/10.5735/085.053.0106
  20. Inoue, K. (2016) Didymoplexiella Garay. In: Iwatsuki, K., Boufford, D.E. & Ohba, H. (Eds.) Flora of Japan. Vol. IVb. Kodansha LTD, Tokyo, pp. 260.
  21. IUCN Standards and Petitions Committee (2023) Guidelines for Using the IUCN Red List Categories and Criteria. Version 14. Prepared by the Standards and Petitions Committee. Available from: https://www.iucnredlist.org/documents/RedListGuidelines.pdf (accessed on 16 June 2023).
  22. Kumar, P. & Gale, S.W. (2020) Additions to the orchid flora of Laos and taxonomic notes on orchids of the Indo-Burma region-II. Taiwania 65 (1): 47‒60. https://doi.org/10.6165/tai.2020.65.47
  23. Kumar, P., Gale, S.W., Schuiteman, A., Bouamanivong, S. & Fischer, G.A. (2016) Identifying orchid hotspots for biodiversity conservation in Laos: the limestone karst vegetation of Vang Vieng District, Vientiane Province. Journal of Threatened Taxa 8 (12): 9397–9417. https://doi.org/10.11609/jott.2826.8.12.9397-9417
  24. Kumar, P., Bouamanivong, S., Fischer, G.A. & Gale, S.W. (2020) Didymoplexiella laosensis (Orchidaceae: Epidendroideae: Gastrodieae), a new holomycotrophic orchid from Lao PDR. Phytotaxa 430 (1): 1–8. https://doi.org/10.11646/phytotaxa.430.1.1
  25. Lin, T.P., Liu, H.Y., Hsieh, C.F. & Wang, K.H. (2016) Complete list of the native orchids of Taiwan and their type information. Taiwania 61 (2): 78‒126. https://doi.org/10.6165/tai.2016.61.78
  26. Lindsay, S., Middleton, D.J., Ho, B.C., Chong, K.Y., Turner, I.M., Ali, Ibrahim, Alonso-García, M., Ang, W.F., Ashton, P.S., Athen, P., Atkins, S., Bazilah Ibrahim, Beentje, H.J., Boo, C.M., Boyce, P.C., Bramley, G.L.C., Buerki, S., Callmander, M.W., Chantanaorrapint, S., Cheek, M., Chen, C.-W., Chen, J., Chen, L.M.J., Chew, P.T., Chong, R., Choo, L.M., Chung, R.C.K., Coode, M.J.E., Chua, S.C., Cicuzza, D., de Kok, R.P.J., Davison, G.W.H., de Wilde, W.J.J.O., Duistermaat, H., Dubéarnès, A., Duyfjes, B.E.E., Ellis, L.T., Esser, H.-J., Gajurel, P.R., Gale, S.W., Ganesan, S.K., Gardner, E.M., Geiger, D.L., Harwood, R.K., Hassan Ibrahim, He, S., Henderson, A., Hovenkamp, P.H., Hughes, M., Zaki Jamil, Jebb, M.H.P., Johnson, D.M., Kartonegoro, A., Kiew, R., Knapp, S., Koh, S.L., Kurzweil, H., Lee, S., Leong, P.K.F., Leong-Škorničková, J., Levin, G.A., Liew, D.C.H., Lim, R.C.J., Lim, W.H., Loo, A.H.B., Low, Y.W., Lua, H.K., Lum, S., Mabberley, D.J., Mahyuni, R., Maslin, B., Murray, N.A., Neo, L., Ng, X.Y., Ngo, K.M., Niissalo, M.A., Ong, P.T., Pannell, C.M., Phang, A., Prance, G.T., Promma, C., Puglisi, C., Rodda, M.L., Rubasinghe, S.C.K., Saunders, R.M.K., Savinov, I.A., Saw, L.G., Schuiteman, A., Seah, W.W., Simpson, D.A., Strijk, J.S., Sukkharak, P., Sugumaran, M., Syahida-Emiza, S., Tan, J.P.C., Taylor, N.P., Teo, Y.K.L., Thomas, D.C., Trias-Blasi, A., Utteridge, T., van Welzen, P.C., Veldkamp, J.F., Vermeulen, J., Wang, R., Wilkie, P., Wei, Y.-M., Wong, S.Y., Wong, K.M., Yaakub, S., Yam, T.W., Yang, S., Yao, T.L., Ye, W., Yee, A.T.K., Yeo, C.K., Yeoh, Y.S., Yong, C., Yong, K.T., Zerega, N.J.C., Zhu, R.-L. & Er, K.B.H. (2022) Flora of Singapore: Checklist and bibliography. Gardens’ Bulletin Singapore 74 (Suppl. 1): 3–860. https://doi.org/10.26492/gbs74(suppl.1).2022-01
  27. Maekawa, F. (1977) Didymoplexiella (Orchidaceae) newly found in Japan. Journal of Japanese Botany 52 (2): 63–64. https://doi.org/10.51033/jjapbot.52_2_6719
  28. Nuraliev, M.S., Kuznetsov, A.N., Kuznetsova, S.P. & Averyanov, L.V. (2019) Towards inventory of non-photosynthetic plants in Vietnam: a progress report. Wulfenia 26: 147–154.
  29. Ridley, H.N. (1891) On two new genera of orchids from the East Indies. Journal of the Linnean Society of London, Botany 28 (195): 340–343. https://doi.org/10.1111/j.1095-8339.1891.tb01465.x
  30. Ridley, H.N. (1908) New or rare Malayan plants. Series IV. Journal of the Straits Branch of the Royal Asiatic Society 50: 111–152.
  31. Ridley, H.N. (1924) The flora of the Malay Peninsula. IV. Monocotyledones. L. Reeve & Co., Ltd, London. Reprint, 1967 by A. Asher & Co., Amsterdam, and L. Reeve & Co., Brook Nr. Ashford, 383 pp.
  32. Rojchana-umpawan, P., Chantanaorrapint, S., Suddee, S. & Chantanaorrapint, A. (2014) Didymoplexiella trichechus (Orchidaceae), a new species record for Thailand. Thai Forest Bulletin (Botany) 42: 68–70.
  33. Schuiteman, A., Nay, S. & Att, S. (2022) New records of Orchidaceae from Cambodia V. Cambodian Journal of Natural History 2022 (1): 127–143.
  34. Seidenfaden, G. (1972) Contributions to orchid flora of Thailand IV. Botanisk Tidsskrift 67: 76–127.
  35. Seidenfaden, G. (1975) Contributions to orchid flora of Thailand VI. Botanisk Tidsskrift 70: 64–97.
  36. Seidenfaden, G. (1978) Orchid genera in Thailand VI. Neottioideae Lindl. Dansk Botanisk Arkiv 32 (2): 1–195.
  37. Seidenfaden, G. (1997) Contributions to the orchid flora of Thailand XIII. Olsen & Olsen, Fredenborg, 65 pp.
  38. Seidenfaden, G. & Smitinand, T. (1959) The orchids of Thailand. A preliminary list. Part 1. The Siam Society, Bangkok, 870 pp.
  39. Seidenfaden, G. & Wood, J.J. (1992) The orchids of Peninsular Malaysia and Singapore. Olsen & Olsen, Fredensborg, 779 pp.
  40. Shen, X.L., Bing, Z.F., Wu, L. & Lin, C.R. (2015) Didymoplexiella Garay, a newly recorded genus of Orchidaceae from Guangxi, China. Guihaia 35 (2): 285–287. http://dx.doi.org/10.11931/guihaia.gxzw201403010
  41. Smith, J.J. (1920) Orchidaceae novae Malayenses, IX. Bulletin du Jardin Botanique de Buitenzorg 3 (2): 15–127.
  42. Su, H.J. (2000) Orchidaceae. In: Huang, T.C. (Ed.) Flora of Taiwan, 2nd ed., 5. Editorial Committee, Taipei, pp. 729–1086.
  43. Suddee, S. (2014) 55. Didymoplexiella. In: Santisuk, T. & Baslev, H. (Eds.) Flora of Thailand 12 (2). Orchidaceae 2. The Forest Herbarium, National Park, Wildlife and Plant Conservation Department, Bangkok, pp. 479–482.
  44. Suetsugu, K. & Hsu, T.C. (2019) New combinations in the genus Didymoplexis (Orchidaceae; Epidendroideae; Gastrodieae), with a new variety of D. siamensis from Amami-Oshima Island, Japan. Phytotaxa 388 (2): 174–178. https://doi.org/10.11646/phytotaxa.388.2.4
  45. Suetsugu, K., Morita, H., Higa, S. & Yokota, M. (2019) New locality of the mycoheterotrophic orchid Didymoplexiella siamensis (Orchidaceae) from Amami-Oshima Island, Kagoshima Prefecture, Japan. Journal of Japanese Botany 94 (3): 190–192. https://doi.org/10.51033/jjapbot.94_3_10948
  46. Tsukaya, H., Suleiman, M. & Okada, H. (2014) Didymoplexiella trichechus (J.J. Sm.) Garay and a new variety of Didymoplexis cornuta J.J. Sm. (Orchidaceae) in Borneo. Acta Phytotaxonomica et Geobotanica 65 (2): 105–110. https://doi.org/10.18942/apg.KJ00009406726
  47. Turland, N.J., Wiersema, J.H., Barrie, F.R., Greuter, W., Hawksworth, D.L., Herendeen, P.S., Knapp, S., Kusber, W.-H., Li, D.-Z., Marhold, K., May, T.W., McNeill, J., Monro, A.M., Prado, J., Price, M.J. & Smith, G.F. (Eds.) (2018) International Code of Nomenclature for algae, fungi, and plants (Shenzhen Code) adopted by the Nineteenth International Botanical Congress Shenzhen, China, July 2017. Regnum Vegetabile 159. Koeltz Botanical Books, Glashütten. https://doi.org/10.12705/Code.2018
  48. Zhou, X., Cheng, Z., Liu, Q., Zhang, J., Hu, A., Huang, M., Hu, C. & Tian, H. (2016) An updated checklist of Orchidaceae for China, with two new national records. Phytotaxa 276 (1): 1–148. https://doi.org/10.11646/phytotaxa.276.1.1