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

Van Son Dang; Ba Vuong Truong; Nghia Son Hoang; Van Tu Nguyen; Quoc Bao Nguyen; Quoc Trong Pham; Van Tho Le; Cam Nhung Kieu; Van Huong Bui; Akiyo Naiki

doi:10.15625/2615-9023/17544

Author affiliations

Authors

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

DOI:

https://doi.org/10.15625/2615-9023/17544

Abstract

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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