Abstract
A new species of Nymphanthus (Phyllanthaceae), N. adenophorus from Ninh Thuan Province, central Vietnam, is described and illustrated, along with its vernacular name and preliminary conservation status. The new species is similar to N. pireyi and N. nanellus, but distinguished by its terete and shorter floriferous branchlets with fewer leaves, larger leaf blades, faintly visible lateral veins, longer pedicels of male flowers, and accordion-folded discs of pistillate flowers.
References
- Beille, L. (1927) Phyllanthus. In: Lecomte, M.H. (Ed.) Flore générale de l’Indo-Chine 5. Masson, Paris, pp. 571–608.
- Bouman, R.W., Keßler, P.J.A., Telford, I.R.H., Bruhl, J.J. & van Welzen, P.C. (2018) Subgeneric delimitation of the plant genus Phyllanthus (Phyllanthaceae). Blumea 63 (2): 167−198. https://doi.org/10.3767/blumea.2018.63.02.14
- Bouman, R.W., Keßler, P.J.A., Telford, I.R.H., Bruhl, J.J., Strijk, J.S., Saunders, R.M.K. & van Welzen, P.C. (2021) Molecular phylogenetics of Phyllanthus sensu lato (Phyllanthaceae): Towards coherent monophyletic taxa. Taxon 70 (1): 72−98. https://doi.org/10.1002/tax.12424
- Bouman, R.W., Keßler, P.J.A., Telford, I.R.H., Bruhl, J.J., Strijk, J.S., Saunders, R.M.K., Esser, H.-J., Falcón-Hidalgo, B. & van Welzen, P.C. (2022) A revised phylogenetic classification of tribe Phyllantheae (Phyllanthaceae). Phytotaxa 540 (1): 1−100. https://doi.org/10.11646/phytotaxa.540.1.1
- Chantaranothai, P. (2007) Phyllanthus. In: van Welzen, P.C. & Chayamarit, K. (Eds.) Flora of Thailand. Vol. 8, part 2. The Forest Herbarium, National Park, Wildlife and Plant Conservation Department, Bangkok, pp. 473–507.
- Gagnepain, F. & Beille, L. (1931) Euphorbiacées. In: Lecomte, M.H. & Gagnepain, F. (Eds.) Flore générale de l'Indo-Chine 5. Masson, Paris, pp. 229–673.
- Hô, H.H. (2003) Cây cỏ Việt Nam: An illustrated flora of Vietnam, vol. 2. Youth Publication, Ho Chi Minh City, 951 pp.
- Hoffmann, P., Kathriarachchi, H. & Wurdack, K.J. (2006) A phylogenetic classification of Phyllanthaceae (Malpighiales; Euphorbiaceae sensu lato). Kew Bulletin 61 (1): 37−53.
- IUCN (2024) Guidelines for Using the IUCN Red List Categories and Criteria, version 16. Prepared by the Standards and Petitions Committee. Available from: https://www.iucnredlist.org/documents/RedListGuidelines.pdf (accessed 8 August 2024)
- Kantachot, C. & Chantaranothai, P. (2013) A new species of Phyllanthus chayamaritiae (Phyllanthaceae) from Thailand. Blumea 57 (3): 217−220. https://doi.org/10.3897/phytokeys.136.47625
- Li, P.T. (1987) A revision of Chinese Phyllanthus (Euphorbiaceae). Acta Phytotaxonomica Sinica 25 (5): 371−383.
- Li, P.T. & Gilbert, M.G. (2008) Phyllanthus. In: Wu, Z.Y., Raven, P.H. & Hong, D.Y. (Eds.) Flora of China. Vol. 11. Science Press, Beijing and Missouri Botanical Garden, St. Louis, pp. 180–190.
- Linnaeus, C. (1753) Species Plantarum. Impensis Laurentii Salvii, Holmiae, 1200 pp.
- Loureiro, J. (1790) Flora Cochinchinensis, vol. 2. Ulyssipone, Lisbon, 744 pp.
- Pornpongrungrueng, P., Chantaranothai, P., Parnell, J.A. & Hodkinson, T.R. (2019) Two new species of Phyllanthus (Phyllanthaceae) from Thailand. PhytoKeys 136: 35−44. https://doi.org/10.3897/phytokeys.136.47625
- Pornpongrungrueng, P., Parnell, J.A.N., Hodkinson, T.R. & Chantaranothai, P. (2017) Phyllanthus kaweesakii (Phyllanthaceae), a new species from Thailand. Botany 95 (6): 567−577. https://doi.org/10.1139/cjb-2016-0298
- POWO (2024) Plants of the World Online. Royal Botanic Gardens, Kew. Available from: http://www.plantsoftheworldonline.org/ (accessed 25 July 2024)
- Thiers, B.M. (2024 continuously updated) Index Herbariorum. A global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium. Available from: https://sweetgum.nybg.org/science/ih/ (accessed 17 April 2024)
- Thin, N.N. (2007) Taxonomy of Euphorbiaceae in Vietnam. Vietnam National University Publishers, Hanoi, 407 pp.
- van Welzen, P.C., Pruesapan, K., Telford, I.R.H., Esser, H.-J. & Bruhl, J.J. (2014) Phylogenetic reconstruction prompts taxonomic changes in Sauropus, Synostemon and Breynia (Phyllanthaceae tribe Phyllantheae). Blumea 59 (2): 77−94. https://doi.org/10.3767/000651914X684484
- Yamamoto, T., Souladeth, P., Phonepaseuth, P., Kongxaisavath, D., Vongthavone, T., Truong, B.V., Pham, Q.T., Souvannakhoummane, K. & Tagane, S. (2024) Nymphanthus namkadingensis, a new species of Phyllanthaceae from Laos. Phytotaxa 650 (3): 199–205. https://doi.org/10.11646/phytotaxa.650.3.1