Research Paper

Heterostemma saolaense (Apocynaceae: Asclepiadoideae), a new species from central Vietnam

Tien Chinh Vu, Tuan Anh Le, Dien Dinh, The Bach Tran, Michele Rodda

Published on: 12 April 2022

Page: 235 - 238

DOI: 10.6165/tai.2022.67.235


Heterostemma saolaense, a new species from Vietnam is described, illustrated and compared with the similar species Heterostemma maculatum. The two species differ in stem pubescence, peduncle, calyx and corolla size.

Keyword: Angiosperms, Ceropegieae, Heterostemma maculatum, Saola Nature Reserve, taxonomy


Costantin, J. 1912. Heterostemma. In: Lecomte, P.H. (Ed.) Flore G?n?rale de l’Indo-Chine 4 Masson & Co., Paris, pp. 119–125.

Forster, P.I. 1992. A taxonomic revision of Heterostemma Wight & Arn. (Asclepiadaceae: Stapelieae) in Australia and the western Pacific. Aust. Syst. Bot. 5(1): 71?80.
DOI: 10.1071/SB9920071View Article Google Scholar

Ho, P.H. 1993. Cay co Viet Nam: An illustrated flora of Vietnam. Mekong Printing, Montreal.

IUCN 2012. IUCN Red List Categories and Criteria: Ver. 3.1., 2nd edn. – IUCN, Gland, Switzerland and Cambridge, UK. Available from: (accessed 3 November 2021)

Li, P.T., M.G. Gilbert and W.D. Stevens 1995. Heterostemma. In: Wu, Z.Y. & P.H. Raven (Eds.) Flora of China 16. pp. 263–265. Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis.

Rodda, M. 2016. Checklist and typification of Heterostemma (Apocynaceae, Asclepiadoideae, Ceropegieae). Phytotaxa 263(1): 1–17.
DOI: 10.11646/phytotaxa.263.1.1View Article Google Scholar

Swarupanandan, K., N. Sasidharan and J.K. Mangaly 1989. A reconsideration of the generic circumscription of Heterostemma Wight & Arn. (Asclepiadaceae) and a new species from India. Bot. J. Linn. Soc. 101(2): 249–259.
DOI: 10.1111/j.1095-8339.1989.tb00158.xView Article Google Scholar

Thaithong, O., A. Kidyoo and M. Kidyoo 2018. Handbook of Asclepiads of Thailand. Amarin Printing and Publishing Public Company Limited, Bangkok.

Thammarong, W., S. Rakarcha, W. Pongamornkul and M. Rodda 2021. Heterostemma menghaiense (Apocynaceae), a new record for Laos and Thailand. Thai Forest Bulletin (Botany) 49(1): 63–65.
DOI: 10.20531/tfb.2021.49.1.07View Article Google Scholar

Thiers, B. continuousdly updated. Index Herbariorum: A global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium. Available from: (accessed 3 November 2021)

Tran, T.B. 2005. Asclepiadaceae. In: Ban NT (Ed.) Checklist of Plant Species of Vietnam 3: 58–75, Agricultural Publishing House, Hanoi, Vietnam.

Tran, T.B. 2017. Asclepiadaceae. In: Flora of Vietnam 15: 221–232, Publishing House for Science and Technology, Hanoi.

Tran, T.B, L.N. Han, D.V. Hai, B.H. Quang, N.T.T. Huong, B.T. Ha, T.V. Hai and M. Rodda 2020. Heterostemma cucphuongense (Apocynaceae, Asclepiadoideae), a new species from Vietnam. Phytokeys 148: 119–124.
DOI: 10.3897/phytokeys.148.50029View Article Google Scholar