Flora of Nam Kading National Protected Area IX: Two new species and six new records of angiosperms for the flora of Laos

Authors

  • Shuichiro Tagane The Kagoshima University Museum, Kagoshima University, 1-21-30 Korimoto, Kagoshima, 890-0065, Japan
  • Phetlasy Souladeth Faculty of Forest Science, National University of Laos, Dongdok Campus, Xaythany District, Vientiane Capital, Laos
  • Deuanta Kongxaisavath Faculty of Forest Science, National University of Laos, Dongdok Campus, Xaythany District, Vientiane Capital, Laos
  • Keooudone Souvannakhoummane Faculty of Natural Science, National University of Laos, Dongdok Campus, Xaythany District, Vientiane Capital, Laos
  • Phongphayboun Phonepaseuth Faculty of Environmental Sciences, National University of Laos, Dongdok Campus, Xaythany District, Vientiane Capital, Laos
  • Thyraphon Vongthavone Association for Community Development (ACD), Salavan Province, Laos
  • Van Son Dang Institute of Life Sciences, Vietnam Academy of Science and Technology, Vietnam
  • Takenori Yamamoto The Kagoshima University Museum, Kagoshima University, 1-21-30 Korimoto, Kagoshima, 890-0065, Japan

DOI:

https://doi.org/10.20531/tfb.2026.54.1.01

Keywords:

Bolikhamxai, Botanical inventory, Indochina, Khammouane, plant taxonomy

Abstract

Two new species, Greenea laotica (Rubiaceae) and Palaquium laoticum (Sapotaceae), are described based on specimens collected from the Nam Kading National Protected Area and its vicinity in central Laos. In addition, six taxa of angiosperms are reported as new records for the flora of Laos: Lonicera macrantha (Caprifoliaceae), Heritiera angustata, Heritiera parvifolia (Malvaceae), Olax imbricata (Olacaceae), Pellacalyx yunnanensis (Rhizophoraceae), Psychotria bonii (Rubiaceae), and Pouzolzia zeylanica var. calcicola (Urticaceae). For each species, voucher specimens are cited, photographs are shown and additional information including geographical distribution, ecology and taxonomic notes are provided. Lectotype is proposed for Olax imbricata.

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References

Aubréville, A. (1963). Sapotaceae. Flore du Cambodge, du Laos et du Vietnam Vol. 3. Muséum national d’histoire naturelle, Paris.

Chantaranothai, P. (1988). Palaquium hansenii, a new species of Sapotaceae from Thailand. Nordic Journal of Botany 18: 365–367.

Chantaranothai, P. (2014). Sapotaceae. In: Santisuk, T. & Balslev, H. (eds.), Flora of Thailand 11(4), pp. 610–655. The Forest Herbarium, Bangkok.

Gagnepain, F. (1910). Sterculiacées. In: M.H. Lecomte & F. Gagnepain (eds), Flore générale de l’Indo-chine 1, pp. 454–522. Masson, Paris.

Hô, P.H. (2003). An Illustrated Flora of Vietnam. Vol. 2. published by author, Ho Chi Minh City.

Kostermans, A.J.G.H. (1959). A monograph of the genus Heritiera Aiton (StercuL) (including Argyrodendron F. v. M. and Tarrietia Bl.). Reinwardtia 4: 465–583.

Li, S.G. & Pennington, D. (1996). Sapotaceae. In: Wu, Z.Y, Raven, P.H. & Hong, D.Y. (eds.), Flora of China 15, pp. 205–214. Beijing, Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis.

Lim, C.K., Kim, J., Saysavanh, V. & Won, H. (2016). New records of flowering plants from Lao PDR. Korean Journal of Plant Taxonomy 46: 349–355. https://doi.org/10.11110/kjpt.2016.46.4.348

Newman, M.F., Ketphanh, S., Svengsuksa, B., Thomas, P., Sengdala, K., Lamxay, V. & Armstrong, K. (2007). A Checklist of the Vascular Plants of Lao PDR. Royal Botanic Garden Edinburgh, Edinburgh. 394 pp.

Newman, M.F., Pullan, M., Souladeth, P., Ketphanh, S., Svengsuksa, B., Thomas, P., Sengdala, K., Lamxay, V. & Armstrong, K. (2017–present). A checklist of the vascular plants of Lao PDR. Online database available at https://padme.rbge.org.uk/laos/ (accessed 3 July 2025)

Phonepaseuth, P., Vuong, T.B., Souladeth, P., Yamamoto, T., Vongthavone, T., Kongxaisavath, D., Trong, T.Q. & Tagane, S. (2024). Two new records of fairy lanterns, Thismia (Thismiaceae) for the Flora of Laos. Thai Forest Bulletin, Botany 52: 56–61. https://doi.org/10.20531/tfb.2024.52.2.07

Phoon, S.N. (2012). Olacaceae. In: R. Kiew, R.C.K. Chung, L.G. Saw & E. Soepadmo (eds.), Flora of Peninsular Malaysia, Series II: Seed Plants, Volume 3, pp. 299–329. Forest Research Institute Malaysia, Selangor Darul Ehsan, Malaysia.

Pitard, J. (1924). Rubiacées. In: H. Lecomte (ed.), Flore générale de l’Indo-Chine 3, pp. 20–442. Masson et Cie, Paris.

POWO (2025). Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; https://powo.science.kew.org/ (accessed 3 July 2025)

Qin, H.N. & Boufford, D.E. (2007). Rhizophoraceae. In: Wu, Z.Y, Raven, P.H. & Hong, D.Y. (eds.), Flora of China 13, pp. 295–299. Beijing, Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis.

Rushforth, K. (2010). 669. Lonicera macrantha (Caprifoliaceae). Curtis’s Botanical Magazine 27: 51–53, 55–58.

Sleumer, H. (1980). A taxonomic account of the Olacaceae of Asia, Malesia, and the adjacent areas. Blumea 26: 145–168.

Sleumer, H. (1984). Olacaceae. In: van Steenis, C.G.G.J. (ed). Flora Malesiana. Series 1. Spermatophyta, vol. 10, pp. 1–29. Noordhoff, Leiden.

Souladeth, P., Tagane, S. & Yahara, T. (2019). Flora of Nam Kading National Protected Area V: Two new species of Camellia (Theaceae), C. namkadingensis and C. rosacea. Thai Forest Bulletin, Botany 47: 82–90. https://doi.org/10.20531/tfb.2019.47.1.12

Souladeth, P, Tagane, S, Zhang, M, Okabe, N & Yahara, T. (2017). Flora of Nam Kading National Protected Area I: a new species of yellow-flowered Strobilanthes (Acanthaceae), S. namkadingensis. PhytoKeys 81: 11–17. https://doi.org/10.3897/phytokeys.81.13203

Srisuk, T., Chamchmroon, V. & Pornpongrungrueng, P. (2020). New records of the genus Psychotria (Rubiaceae) from Thailand. Thai Forest Bulletin, Botany 48: 101–107. https://doi.org/10.20531/tfb.2020.48.2.03

Tange, C. (2013). A revision of the genus Greenea (Rubiaceae). Thai Forest Bulletin, Botany 41: 64–80.

Tagane, S., Souladeth P., Zhang, M. & Yahara, T. (2018a). Flora of Nam Kading National Protected Area IV: Two new species of Annonaceae, Monoon namkadingense and Neo-uvaria laosensis. Phytotaxa 336: 82–88. https://doi.org/10.11646/phytotaxa.336.1.6

Tagane, S., Souladeth, P., Rueangruea, S., Okabe, N., Zhang, M., Chayer, S., Yang, C.-J. & Yahara, T. (2018b). Flora of Nam Kading National Protected Area II: 30 new records of angiosperms for Laos. Edinburgh Journal of Botany 75: 107–116. https://doi.org/10.1017/S0960428617000361

Tagane, S., Souladeth, P., Nagahama, A., Suyama, Y., Ishii, N., Tanaka, N. & Yahara, T. (2020). Twenty-five new species records in the flora of Laos. Natural History Bulletin of Siam Society 64: 25–41.

Vu, T.C., Bach, T.T., Hai D.V. & Quang, B.H. (2010). Genus Pellacalyx – a new record for flora of Vietnam. Academia Journal of Biology 32: 59–61. (In Vietnamese with English summary)

Wilmot-Dear, C.M. & Friis, I. (2006). The Old World species of Pouzolzia (Urticaceae, tribus Boehmerieae). A taxonomic revision. Nordic Journal of Botany 24: 5–114.

Yang, Q., Lardrein, S., Osborne, J. & Borosova, P. (2011). Caprifoliaceae. In: Wu, Z.Y, Raven, P.H. & Hong, D.Y. (eds.), Flora of China 19, pp. 616–641. Beijing, Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis.

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Published

2026-01-06

How to Cite

Tagane, S., Souladeth, P., Kongxaisavath, D., Souvannakhoummane, . K., Phonepaseuth, . P., Vongthavone, T., Dang, V. S., & Yamamoto, T. (2026). Flora of Nam Kading National Protected Area IX: Two new species and six new records of angiosperms for the flora of Laos. Thai Forest Bulletin (Botany), 54(1), 1–12. https://doi.org/10.20531/tfb.2026.54.1.01

Issue

Vol. 54 No. 1 (2026)

Section

Articles

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