Two new species of Lasianthus Jack (Rubiaceae) from southern Vietnam

  • Minh Quan Dang School of Education, Can Tho University, 3/2 Street, Ninh Kieu District, Can Tho City, Vietnam
  • Manh Ha Nguyen Pedo-Geography and Soil Resources, Institute of Geography (IG), Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnam
  • Nghia Son Hoang Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnam
  • Van Tho Le Institute of Tropical Biology, Vietnam Academy of Science and Technology, 85 Tran Quoc Toan Street, District 3, Ho Chi Minh City, Vietnam
  • Thi Mai Huong Nguyen  Institute of Tropical Biology, Vietnam Academy of Science and Technology, 85 Tran Quoc Toan Street, District 3, Ho Chi Minh City, Vietnam
  • Nguyen Quynh Chi Ho Institute of Tropical Biology, Vietnam Academy of Science and Technology, 85 Tran Quoc Toan Street, District 3, Ho Chi Minh City, Vietnam
  • Ba Vuong Truong Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnam
  • Van Son Dang Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnam
Keywords: Kon Chu Rang, Lasianthus, new species, Nudiflorae, Rubiaceae, taxonomy

Abstract

Two new species of shrubs in the genus Lasianthus Jack (Rubiaceae), L. naikii V.S.Dang & Vuong sp. nov. and L. sonlangensis V.S.Dang, Vuong & Quan sp. nov. from Kon Chu Rang Nature Reserve of Gia Lai Province in southern Vietnam, are described and illustrated. The similarities and differences of two new species with the morphologically closest allies are presented. Descriptions, illustrations, colour plates and vernacular names are provided.

References

Bui H.Q., Do V.H., Nguyen S.K., Le T.M.L., Tran D.B., Doan H.S., Tran T.P.A. & Moller M. 2019. Boeica konchurangensis sp. nov. (Gesneriaceae) from Gia Lai plateau, Vietnam. Nordic Journal of Botany 37 (5): 1–8. https://doi.org/10.1111/njb.02333

Bui H.Q., Tran T.B., Ha T.D., Do V.H., Nguyen T.T.H., Bui T.H. & Dang V.S. 2020. A new species of Psydrax (Vanguerieae, Rubiaceae) from the Gia Lai Plateau, southern Vietnam. PhytoKeys 149: 99–107. https://doi.org/10.3897/phytokeys.149.51710

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. & Naiki A. 2020. Two new species of Lasianthus (Rubiaceae) from northern Vietnam. Annales Botanici Fennici 57 (1–3): 49–54. https://doi.org/10.5735/085.057.0106

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 (5–6): 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 (3–4): 263–266. https://doi.org/10.5735/085.053.0414

Dang V.S., Tagane S., Toyama H., Nguyen V.N., Hoang N.S., Naiki A. 2017. A new record Lasianthus cambodianus Pit. (Rubiaceae) for the flora of Vietnam. Journal of Biotechnology 15 (3A): 263–267.

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 55 (1–3): 191–195. https://doi.org/10.5735/085.056.0123

Do V.H., Min D.Z., Nguyen S.K., Tan Y.H., Thoa P.T.K., Bramley G.L.C., Rogier P.J.K. & Li B. 2018. Premna vietnamensis (Lamiaceae, Premnoideae), a distinct new species from the Central Highlands of Vietnam. PLoS ONE 13 (5): e0195811. https://doi.org/10.1371/journal.pone.0195811

Do V.H., Duong T.H., Lin Z., Deng Y., Choudhary R.K. & Lee J. 2021. Rungia gialaiensis (Acanthaceae), a new species from the Central Highlands of Vietnam. Phytotaxa 500 (4): 294–300. https://doi.org/10.11646/phytotaxa.500.4.5

Ha T.D., Bui H.Q., Tran T.B., Do V.H., Nguyen T.T.H., Bui T.H., Tagane S., Oguri E., Naiki A. & Dang V.S. 2020. A new species of Lasianthus (Rubiaceae), L. konchurangensis, from the Central Highlands of Vietnam. Phytotaxa 451 (2): 161–168. https://doi.org/10.11646/phytotaxa.451.2.6

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

Naiki A., Tagane S., Nguyen V.N., Toyama H. & Yahara T. 2017. New localities and flower morphology for Lasianthus giganteus (Rubiaceae). Acta Phytotaxonomica et geobotanica 68 (1): 59–62. https://doi.org/10.18942/apg.201614

Napiroon T., Chayamarit K., Dawson S., Till W. & Balslev 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

Nguyen V.D., Dinh Q.D., Ha M.T., Bui H.Q. & Boy P.C. 2019. A new species of Anadendrum (Araceae – Anadendreae) from Vietnam. Blumea 64: 190 –193. https://doi.org/10.3767/blumea.2019.64.02.11

Pham H.H. 2000. Cây cỏ Việt Nam: An Illustrated Flora of Vietnam, Vol. 3. Youth Publication, Ho Chi Minh City.

Pitard J. 1924. Rubiacées. In: Lecomte P.H., Humbert H. & Gagnepain F. (eds) Flore générale de l’Indo-Chine 3: 395. Masson, Paris.

Robbrecht E. 1988. Tropical woody Rubiaceae. Opera Botanica Belgica 1: 132.

Sy D.T., Tran T.B., Choudhary R.K., Tucker G.C., Do V.H., Bui H.Q., Vu T.C. & Lee J. 2015. Capparis gialaiensis (Capparaceae), a new species from Vietnam. Annales Botanici Fennici 52 (3–4): 219–223. https://doi.org/10.5735/085.052.0314

Sy D.T., Do V.H., Choudhary R.K., Tran T.B., Chu H.M., Nguyen H.Q., Nguyen T.T.N., Tucker G.C. & Lee J. 2020. Capparis kbangensis (Capparaceae), a new species from central Vietnam. PhytoKeys 151: 83–91. https://doi.org/10.3897/phytokeys.151.50477

Thiers B. 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 25 Feb. 2022].

Wong K.M., Turner I.M., Wang R.J., Harwood R., Seah W.W., Ng X.Y., Lim R.C.J., Lua H.K. & Mahyuni R. 2019. Rubiaceae. In:Middleton D.J., Leong-Škorničková J. & Lindsay S. (eds) Flora of Singapore Vol. 13: 1–358. National Parks Board, Singapore. https://doi.org/10.26492/fos13.2019-01

Zhu H. 2000. New plants of genus Lasianthus (Rubiaceae) from Vietnam. Acta Botanica Yunnanica 22 (4): 395–398.

Zhu H. & Roos M.C. 2002. Three new species of the genus Lasianthus (Rubiaceae) from Vietnam. Blumea 47: 395–401.

Zhu H. & Taylor C.M. 2011. Lasianthus. In: Wu Z.Y., Raven P.H. & Hong D.Y. (eds) Flora of China, Vol. 19: 185–198. Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis.

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

Published
2022-03-18
How to Cite
Dang, M. Q., Nguyen, M. H., Hoang, N. S., Le, V. T., Nguyen, T. M. H., Ho, N. Q. C., Truong, B. V., & Dang, V. S. (2022). Two new species of Lasianthus Jack (Rubiaceae) from southern Vietnam. European Journal of Taxonomy, 806(1), 19–31. https://doi.org/10.5852/ejt.2022.806.1697
Section
Research article