Abstract
Two new species of Lasianthus (Rubiaceae), L. bolavenensis Tagane & Soulad., and L. laoticus Tagane, Soulad. & Nob.Tanaka from Bolaven Plateau, southern Laos, are described and illustrated, with their vernacular names and preliminary conservation status. In addition, L. repoeuensis Pierre ex Pit. is recorded in Laos for the first time.
References
Blume, C.L. (1826–1827) Bijdragen tot de flora van Nederlandsch Indie?, Part 16–17. Ter Lands Drukkerij, Batavia, pp. 994–1001. https://doi.org/10.5962/bhl.title.115427
Dang, V.S., Tagane, S., Toyama, H. & Tran, H. (2015) Lasianthus yaharae (Rubiaceae), a new species from Hon Ba Nature Reserve, southern Vietnam. Annales Botanici Fennici 52: 352–354. https://doi.org/10.5735/085.052.0513
Dang, V.S., Tagane, S., Toyama, H., Naiki, A., Nagamasu, H. & Yahara, T. (2016) Lasianthus honbaensis (Rubiaceae), a new species from southern Vietnam. Annales Botanici Fennici 53: 263–266. https://doi.org/10.5735/085.053.0414
Dang, V.S. & Naiki, A. (2019) Two new species of Lasianthus (Rubiaceae) from Hoang Lien National Park, northern Vietnam. Phytotaxa 423 (1): 33–40. https://doi.org/10.11646/phytotaxa.423.1.4
Dang, V.S., Tagane, S., Hoang, N.S., Toyama, H. & Naiki, A. (2019) Lasianthus bidoupensis (Rubiaceae), a new species from southern Vietnam. Annales Botanici Fennici 56: 191–195. https://doi.org/10.5735/085.056.0123
Dang, V.S. & Naiki, A. (2020) Two new species of Lasianthus (Rubiaceae) from northern Vietnam. Annales Botanici Fennici 57: 49–54. https://doi.org/10.5735/085.057.0106
IUCN (2012) IUCN Red List Categories and Criteria, version 3.1. Gland and Cambridge. Available from: http://www.iucnredlist.org (accessed 24 March 2021)
Naiki, A., Tagane, S., Chhang, P., Toyama, H., Zhu, H., Dang, V.S. & Yahara, T. (2015) Flora of Bokor National Park, Cambodia II: four new species and nine new records of Lasianthus (Rubiaceae) from Cambodia. Acta Phytotaxonomica et Geobotanica 66 (3): 153–179. https://doi.org/10.18942/apg.KJ00010115702
Napiroon, T., Balslev, H., Poopath, M., Chamchumroon, V., Vajrodaya, S. & Chayamarit, K. (2018) Three new taxa and a new record of Lasianthus (Rubiaceae) in Thailand. Annales Botanici Fennici 55 (4–6): 207–216. https://doi.org/10.5735/085.055.0402
Napiroon, T., Chayamarit, K., Dawson, S., Till, W. & Balsvlev, H. (2020) A synopsis of Lasianthus (Lasiantheae, Rubiaceae) in Thailand and two additional new species. Phytotaxa 439 (1): 1–38. https://doi.org/10.11646/phytotaxa.439.1.1
Parker, R. (1925) Decades Kewenses. Plantarum Novarum in Herbario Hortii Regii Conservatorum. Kew Bulletin 10: 426–433. https://doi.org/10.2307/4115104
Pham, H.H. (2000) Cây c? Vi?t Nam: An illustrated flora of Vietnam, vol. 3. Youth Publication, Ho Chi Minh City, pp. 202–209.
Pitard, J. (1924) Lasianthus Jack. In: Lecomte, P.H., Humbert, H. & Gagnepain, F. (Eds.) Flore générale de l’Indo-Chine 3. Masson, Paris, pp. 371–399.
Souladeth, P., Tagane, S., Newman, M.F. & Prajaksood, A. (2020) Two new species of Eriocaulon (Eriocaulaceae) from Laos. Kew Bulletin 75: 56. https://doi.org/10.1007/s12225-020-09909-0
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 the Siam Society 64: 25–41.
Tagane, S., Souladeth, P., Kongxaysavath, D., Rueangruea, S., Suddee, S., Suyama, Y., Suzuki, E. & Yahara, T. (2020) Two new species and 20 new records for the flora of Laos. Thai Forest Bulletin, Botany 49 (1): 111–126. https://doi.org/10.20531/tfb.2021.49.1.14
Zhu, H. (2001) A taxonomic revision of the genus Lasianthus Jack (Rubiaceae) from Thailand. Acta Phytotaxonomica Sinica 39: 116–150.
Zhu, H. & Taylor, C.M. (2011) Lasianthus. In: Wu, Z.Y., Raven, P.H. & Hong, D.Y. (Eds.) Flora of China, vol. 19. Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis, pp. 185–198.
Zhu, H., Roos, M.C. & Ridsdale, C.E. (2012) A taxonomic revision of the Malesian species of Lasianthus (Rubiaceae). Blumea 57: 1–102. https://doi.org/10.3767/000651912X652012
Dang, V.S., Tagane, S., Toyama, H. & Tran, H. (2015) Lasianthus yaharae (Rubiaceae), a new species from Hon Ba Nature Reserve, southern Vietnam. Annales Botanici Fennici 52: 352–354. https://doi.org/10.5735/085.052.0513
Dang, V.S., Tagane, S., Toyama, H., Naiki, A., Nagamasu, H. & Yahara, T. (2016) Lasianthus honbaensis (Rubiaceae), a new species from southern Vietnam. Annales Botanici Fennici 53: 263–266. https://doi.org/10.5735/085.053.0414
Dang, V.S. & Naiki, A. (2019) Two new species of Lasianthus (Rubiaceae) from Hoang Lien National Park, northern Vietnam. Phytotaxa 423 (1): 33–40. https://doi.org/10.11646/phytotaxa.423.1.4
Dang, V.S., Tagane, S., Hoang, N.S., Toyama, H. & Naiki, A. (2019) Lasianthus bidoupensis (Rubiaceae), a new species from southern Vietnam. Annales Botanici Fennici 56: 191–195. https://doi.org/10.5735/085.056.0123
Dang, V.S. & Naiki, A. (2020) Two new species of Lasianthus (Rubiaceae) from northern Vietnam. Annales Botanici Fennici 57: 49–54. https://doi.org/10.5735/085.057.0106
IUCN (2012) IUCN Red List Categories and Criteria, version 3.1. Gland and Cambridge. Available from: http://www.iucnredlist.org (accessed 24 March 2021)
Naiki, A., Tagane, S., Chhang, P., Toyama, H., Zhu, H., Dang, V.S. & Yahara, T. (2015) Flora of Bokor National Park, Cambodia II: four new species and nine new records of Lasianthus (Rubiaceae) from Cambodia. Acta Phytotaxonomica et Geobotanica 66 (3): 153–179. https://doi.org/10.18942/apg.KJ00010115702
Napiroon, T., Balslev, H., Poopath, M., Chamchumroon, V., Vajrodaya, S. & Chayamarit, K. (2018) Three new taxa and a new record of Lasianthus (Rubiaceae) in Thailand. Annales Botanici Fennici 55 (4–6): 207–216. https://doi.org/10.5735/085.055.0402
Napiroon, T., Chayamarit, K., Dawson, S., Till, W. & Balsvlev, H. (2020) A synopsis of Lasianthus (Lasiantheae, Rubiaceae) in Thailand and two additional new species. Phytotaxa 439 (1): 1–38. https://doi.org/10.11646/phytotaxa.439.1.1
Parker, R. (1925) Decades Kewenses. Plantarum Novarum in Herbario Hortii Regii Conservatorum. Kew Bulletin 10: 426–433. https://doi.org/10.2307/4115104
Pham, H.H. (2000) Cây c? Vi?t Nam: An illustrated flora of Vietnam, vol. 3. Youth Publication, Ho Chi Minh City, pp. 202–209.
Pitard, J. (1924) Lasianthus Jack. In: Lecomte, P.H., Humbert, H. & Gagnepain, F. (Eds.) Flore générale de l’Indo-Chine 3. Masson, Paris, pp. 371–399.
Souladeth, P., Tagane, S., Newman, M.F. & Prajaksood, A. (2020) Two new species of Eriocaulon (Eriocaulaceae) from Laos. Kew Bulletin 75: 56. https://doi.org/10.1007/s12225-020-09909-0
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 the Siam Society 64: 25–41.
Tagane, S., Souladeth, P., Kongxaysavath, D., Rueangruea, S., Suddee, S., Suyama, Y., Suzuki, E. & Yahara, T. (2020) Two new species and 20 new records for the flora of Laos. Thai Forest Bulletin, Botany 49 (1): 111–126. https://doi.org/10.20531/tfb.2021.49.1.14
Zhu, H. (2001) A taxonomic revision of the genus Lasianthus Jack (Rubiaceae) from Thailand. Acta Phytotaxonomica Sinica 39: 116–150.
Zhu, H. & Taylor, C.M. (2011) Lasianthus. In: Wu, Z.Y., Raven, P.H. & Hong, D.Y. (Eds.) Flora of China, vol. 19. Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis, pp. 185–198.
Zhu, H., Roos, M.C. & Ridsdale, C.E. (2012) A taxonomic revision of the Malesian species of Lasianthus (Rubiaceae). Blumea 57: 1–102. https://doi.org/10.3767/000651912X652012