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Issue: Vol. 632 No. 1: 27 Dec. 2023
Type: Article
Published: 2023-12-27
DOI: 10.11646/phytotaxa.632.1.5
Page range: 60-68
Abstract views: 318
PDF downloaded: 6

A new species, Hoya honglenae and the first report of H. acuminata and H. phuwuaensis (Apocynaceae, Asclepiadoideae) in the flora of Vietnam

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
Komarov Botanical Institute of the Russian Academy of Sciences; Prof. Popov Street 2; 197376; St. Petersburg; Russia
Institute of Tropical Biology Vietnam Academy of Science and Technology; 85 Tran Quoc Toan; District 3; Ho Chi Minh City; Vietnam
Institute of Tropical Biology Vietnam Academy of Science and Technology; 85 Tran Quoc Toan; District 3; Ho Chi Minh City; Vietnam
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
Komarov Botanical Institute of the Russian Academy of Sciences; Prof. Popov Street 2; 197376; St. Petersburg; Russia
Institute of Tropical Biology Vietnam Academy of Science and Technology; 85 Tran Quoc Toan; District 3; Ho Chi Minh City; Vietnam
Eudicots endemism Hoya sect. Peltostemma Hoya sect. Pterostelma Hoya caudata Hoya soidaoensis Kien Giang Province Phu Quoc Island plant conservation plant diversity plant taxonomy

Abstract

Three species of the genus Hoya (Apocynaceae, Asclepiadoideae) are newly reported for the flora of Vietnam. One species, Hoya honglenae, is described and illustrated as new to science, and two species, H. acuminata and H. phuwuaensis, are reported as new national records known earlier, respectively, in Bhutan, Bangladesh, NE India, W China, Myanmar; and NE Thailand. The new species discovered in Phu Quoc Island (Kien Giang Province) morphologically is most close to H. phuwuaensis, but differs in the entire, straight leaf margin, leaves sparsely white speckled adaxially and dirty purple speckled abaxially, smaller yellow flowers, conoid, obtuse, distally up-cured outer angle of corona lobes, and much longer anther appendages. The paper provides morphological descriptions, data on habitat, phenology, distribution, estimated conservation status, taxonomic notes, a list of studied specimens, and color illustrations for all studied species. Taking into consideration our new data, the genus in Vietnam currently includes 44 species.

 

References

  1. Averyanov, L.V., Pham, V.T., Maisak, T.V., Le, T.A., Nguyen, V.C., Nguyen, H.T., Nguyen, P.T., Nguyen, K.S., Nguyen, V.K., Nguyen, T.H. & Rodda, M. (2017) Preliminary checklist of Hoya (Asclepiadaceae) in the flora of Cambodia, Laos and Vietnam. Turczaninowia 20 (3): 103–147. https://doi.org/10.14258/turczaninowia.20.3.10
  2. Beentje, H. (2016) The Kew Plant Glossary, an illustrated dictionary of plant terms (2 edition). Royal Botanic Gardens, Kew, London, 184 pp.
  3. Brown, R. (1810) Prodromus florae Novae Hollandiae et Insulae Van-Diemen, exhibens characteres plantarum. Typis R. Taylor, Londini, 590 pp. https://doi.org/10.5962/bhl.title.3678
  4. Harris, J.G. & Harris, M.W. (2006) Plant identification terminology: an illustrated glossary. Spring Lake Publishing, Spring Lake, 216 pp.
  5. Hickey, M. & King, C. (2013) The Cambridge Illustrated Glossary of Botanical Terms. Cambridge University Press, Cambridge, 208 pp.
  6. Gui, L., Peng, Y., Huang, B., Lan, X. & Yu, L. (2017) Hoya acuminata (Wight) Benth. ex Hook. f. (Apocynaceae, Asclepiadoideae), a newly recorded species from China. Acta Botanica Boreali-Occidentalia Sinica 37: 1252–1254.
  7. Forster, P.I. (2006) The asclepiad flora of New Guinea. In: Marshall, A.J. & Beehler, B.M. (Eds.) The ecology of Papua. Periplus Editions, pp. 371–378.
  8. Forster, P.I. & Liddle, D.J. (1996) Hoya. In: Hewson, H. (Ed.) Flora of Australia 28. CSIRO, Dickson, pp. 231–237.
  9. Hooker, J.D. (1883) The Flora of British India 4. Reeve & Co., London, 780 pp.
  10. IUCN Standards and Petitions Committee (2022) Guidelines for Using the IUCN Red List Categories and Criteria. Version 145.1. Prepared by the Standards and Petitions Committee. Available from: https://nc.iucnredlist.org/redlist/content/attachment_files/RedListGuidelines.pdf https://www.iucnredlist.org/documents/RedListGuidelines.pdf (accessed 20 March 2023).
  11. Kidyoo, M. (2013) Hoya soidaoensis Kidyoo, a new species of Hoya (Asclepiadaceae) from Eastern Thailand. Phytotaxa 105 (2): 45–50 https://doi.org/10.11646/phytotaxa.105.2.3
  12. Kidyoo, M. (2016) Hoya phuwuaensis (Apocynaceae: Asclepiadoideae), a new species from Northeastern Thailand. Phytotaxa 282 (3): 218–224. https://doi.org/10.11646/phytotaxa.282.3.5
  13. Kidyoo, M. (2018) A new species of Hoya (Marsdenieae), three new combinations and two new names in Vincetoxicum (Asclepiadeae) from Thailand. Taiwania 63 (1): 25–31.
  14. Li, P.T, Gilbert, M.G. & Stevens, W.D. (1995) Asclepiadaceae. In: Wu, Z.Y. & Raven, P.H. (Eds.) Flora of China. 16. Science Press, Beijing & Missouri Botanical Garden, St. Louis, pp. 189–270.
  15. Liddle, D.J. (2009) Tropical Hoyas. Subtrop. Gard. 16: pp. 26–31.
  16. Middleton, D.J. & Rodda, M. (2019) Apocynaceae. Apocynaceae. In: Middleton, D.J.. Leong-Škorničkova, J. & Lindsay, S. (Eds.) Flora of Singapore 13: 421–630. Singapore: National Parks Board. https://doi.org/10.26492/fos13.2019-05
  17. Pham, V.T., Kloppenberg, R.D., Averyanov, L.V., Nguyen, G.S., Nguyen, H.T., Le, T.A. & Nguyen, V.C. (2020) Hoya lamthanhiae (Asclepioideae, Apocynaceae), a new species from southern Vietnam. Pakistan Journal of Botany 52 (1): 291–295. https://doi.org/10.30848/PJB2020-1(32)
  18. Rodda, M. (2015) Two new species of Hoya R.Br. (Apocynaceae, Asclepiadoideae) from Borneo. PhytoKeys 53: 83–93. https://doi.org/10.3897/phytokeys.53.5079
  19. Rodda, M. & Rahayu, S. (2018) A revision of the Hoya uncinata complex (Apocynaceae, Asclepiadoideae), with description of a new species. Phytotaxa 383 (3): 252–258. https://doi.org/10.11646/phytotaxa.383.3.2
  20. Rodda, N., Aung, M.M. & Armstrong, K. (2019) A new species, a new subspecies, and new records of Hoya (Apocynaceae, Asclepiadoideae) from Myanmar and China. Brittonia 71 (4): 424–434. https://doi.org/10.1007/s12228-019-09575-y
  21. Schlechter, F.R.R. (1916) Neue Asclepiadaceen von Sumatra und Celebes. Beihefte zum Botanischen Centralblatt 34: 1–18.
  22. Thiers, B. (2023) [continuously updated] Index Herbariorum: A global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium. Available from: http://sweetgum.nybg.org/science/ih/ (accessed: 20 March 2023).
  23. Tran, T.B. (2005) Hoya. In: Checklist of plant species of Vietnam, 3. Ed. Ban, N.T. Agriculture Publishing House, Hanoi, pp. 66–68.
  24. Vietnam Administrative Atlas (2015) Vietnam Publishing House of Natural Resources, Environment and Cartography, Hanoi, 131 pp.
  25. Wight, R. (1834) Contributions to the botany of India. Parbury, Allen, London, 136 pp.