Two new species of genus \(\textit{Helicteres}\) (Helicteroideae, Malvaceae) from Vietnam


  • Van Son Dang Institute of Tropical Biology, VAST , Vietnam
  • Ba Vuong Truong Institute of Genome Research, VAST, Vietnam
  • Nghia Son Hoang Institute of Tropical Biology, VAST, Vietnam
  • Van Tu Nguyen Institute of Tropical Biology, VAST, Vietnam
  • Quoc Bao Nguyen Institute of Tropical Biology, VAST, Vietnam
  • Quoc Trong Pham Institute of Tropical Biology, VAST, Vietnam
  • Van Tho Le Institute of Tropical Biology, VAST, Vietnam
  • Cam Nhung Kieu Graduate University of Science and Technology, VAST, Vietnam
  • Van Huong Bui Tropical Biosphere Research Center, University of the Ryukyus, Japan
  • Akiyo Naiki Tropical Biosphere Research Center, University of the Ryukyus, Japan



Two new species of genus Helicteres (Malvaceae, Helicteroideae), Helicteres Taynguyenenis and Helicteres dakmilensis from the Central Highlands of Vietnam are described and illustrated. H. taynguyenensis is morphologically similar to Helicteres angustifolia widely distributed in mainland SE Asia to China, Japan and Australia, but differs from the latter by having shorter petioles, larger calyx and petals, and longer androgynophores. Helicteres dakmilensis is closely related to Helicteres poilanei endemic to Vietnam, but distinguished by shorter petioles, fewer secondary veins, persistent stipules and bracts, larger calyx and fruits. The IUCN conservation status, vernacular name, illustrations, photographs, and comparison with the closest allies are provided for each of the new species.


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Author Biography

Van Son Dang, Institute of Tropical Biology, VAST , Vietnam

VNM Herbarium, ITB


Angiosperm Phylogeny Group (APG), 2016. An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG IV. Botanical Journal of the Linnean Society, 181: 1–20. boj.12385 boj.12385">

Backer C. A. & van den Brink R. C. B, 1963. Flora of Java, Vol. 1. NVP Noordhoff: Groningen, pp. 110.

Chantaranothai P. & Poompo S., 2020. Taxonomic Notes on the Genus Helicteres L. (Malvaceae) from Thailand, Cambodia and China. Tropical Natural History, 20(3): 235–243.

Cowie I. D., 2011. New taxa and notes on Helicteres L. (Malvaceae: Helicteroideae) from the Northern Territory, Australia. The Beagle, Records of the Museums and Art Galleries of the Northern Territory, 27: 27–54.

Cristóbal C. L., 2001. Taxonomía del género Helicteres (Sterculiaceae). Revisión de las especies Americana. Bonplandia, 11(1–4): 1–206.

Cronquist A., 1981. An integrated system of classification of flowering plants. Columbia University Press, New York, pp. 1262

Dang V. S., Dang M. Q. & Hoang N. S., 2020. Helicteres binhthuanensis V.S.Dang (Malvaceae, Helicteroideae), a new species from southern Vietnam. PhytoKeys, 166: 87–95. 10.3897/phytokeys.166.57647 10.3897/phytokeys.166.57647">

Hoang N. S., Bui D. T., Nguyen T. N. T. & Dang V. S., 2020. A new species of Helicteres (Malvaceae) from southern Vietnam. Taiwania, 65(3): 321‒325.">

IUCN Standards and Petitions Committee, 2022. Guidelines for Using the IUCN Red List Categories and Criteria. Version 15.1. Prepared by the Standards and Petitions Committee.">

Jain S. K. & Rao R. R., 1977. A Handbook of Field and Herbarium Methods. Today and Tomorrow Printers and Publishers, New Delhi, pp. 157.

Kurz W. S., 1877. Forest flora of British Burma 1. Office of the Superintendent of Government Printing, Calcutta, pp. 549.

Linnaeus C., 1753. Species plantarum 2. Impensis Laurentii Salvii, Stockholm, pp. 963.

Mabberley D. J., 2017. Mabberley’s plant-book: a portable dictionary of plants, their classification and uses. Cambridge University Press, Cambridge, pp. 1120.

Masters M. T., 1874. Sterculiaceae. Pp. 353–379. In: J.D. Hooker Flora of British India, Pt 1. L. Reeve and Co: London, pp. 740.

Nyffeler R., Bayer C., Alverson W. S., Yen A., Whitlock B. A., Chase M. W. & Baum D. A., 2005. Phylogenetic analysis of the Malvadendrina clade (Malvaceae s.l.) based on plastid DNA sequences. Organisms, Diversity & Evolution, 5: 109–123.

Pham H.H., 1999. An illustrated flora of Vietnam, Vol. 1. Youth Publication, Ho Chi Minh, pp. 991. Phengklai C., 2001. Sterculiaceae.

In: Santisuk, T. & Larsen, K. (Eds) Flora of Thailand, 7(3): 562–573. Royal Forest Department: Bangkok.

Rondón J. B. & Cumana-Campos L. J., 2007. Taxonomic revision of genus Helicteres L. (Sterculiaceae) in Venezuela. Acta Botanica Venezuelica, 30(1): 163–190.

Tang Y., Gilbert M. G. & Dorr L. J., 2007. Helicteres. In: Wu, Z.Y., Raven, P.H. & Hong, D.Y. (Eds) Flora of China, Vol. 12: 302–330. Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis.

Tardieu-Blot M. L., 1942. Sterculiaceae nouvelles d'Indochine. Notulae Systematicae, 10(4): 234–238.

Thiers B., 2022. Index Herbariorum: A global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium. Available from: (accessed 07 July 2022) (accessed 07 July 2022)">




How to Cite

Dang, V. S., Truong, B. V., Hoang, N. S., Nguyen, V. T., Nguyen, Q. B., Pham, Q. T., Le, V. T., Kieu, C. N., Bui, V. H., & Naiki, A. (2022). Two new species of genus \(\textit{Helicteres}\) (Helicteroideae, Malvaceae) from Vietnam. Academia Journal of Biology, 44(4), 123–132.