Taxonomic studies on Parahellenia (Costaceae) in Vietnam: a new species, P. trongduyii, and a new combination, P. candida

JUAN CHEN; VAN CANH NGUYEN; VAN KHUONG NGUYEN; KHANG SINH NGUYEN; MAXIM S. NURALIEV; NIANHE XIA

doi:10.11646/phytotaxa.583.1.7

Issue: Vol. 583 No. 1: 31 January 2023

Type: Article

Published: 2023-01-31

DOI: 10.11646/phytotaxa.583.1.7

Page range: 72–80

Abstract views: 47

PDF downloaded: 2

Taxonomic studies on Parahellenia (Costaceae) in Vietnam: a new species, P. trongduyii, and a new combination, P. candida

JUAN CHEN⁺⁻
VAN CANH NGUYEN⁺⁻
VAN KHUONG NGUYEN⁺⁻
KHANG SINH NGUYEN⁺⁻
MAXIM S. NURALIEV⁺⁻
NIANHE XIA⁺⁻

Key Laboratory of Plant Resources Conservation and Sustainable Utilization /Guangdong Provincial Key Laboratory of Digital Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, 510650, Guangzhou, People’s Republic of China, South China National Botanical Garden, 510650, Guangzhou, People’s Republic of China

Institute of Applied Technology, Thu Dau Mot University, No. 6 Tran Van On Street, Phu Hoa Ward, Thu Dau Mot City, Binh Duong Province, Vietnam

Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Street, Hanoi, Vietnam, Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Street, Hanoi, Vietnam

Joint Russian-Vietnamese Tropical Scientific and Technological Center, Nguyen Van Huyen Street, Cau Giay, Hanoi, Vietnam, Department of Higher Plants, Biological Faculty, M.V. Lomonosov Moscow State University, 1, 12, Leninskie Gory, 119234 Moscow, Russia

Key Laboratory of Plant Resources Conservation and Sustainable Utilization /Guangdong Provincial Key Laboratory of Digital Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, 510650, Guangzhou, People’s Republic of China, South China National Botanical Garden, 510650, Guangzhou, People’s Republic of China

Monocots Cheilocostus Hellenia morphology plant taxonomy

Requires Subscription or Fee PDF (19MB)

Abstract

Parahellenia trongduyii, a new species of Costaceae from Vietnam, is described and illustrated. The new species is similar to P. tonkinensis, but differs in unbranched or barely branched stems, narrowly triangular-lanceolate glabrous buds, bract apex with a soft mucro, yellow to whitish yellow labellum with longitudinal orange to red lines at center, longer anther crest and stigma with a slightly bilobed dorsal appendage. A new combination, Parahellenia candida, is proposed for the species earlier known as Cheilocostus candidus. A key to Parahellenia in Vietnam is also provided.

References

Beentje, H. (2016) The Kew Plant Glossary, an illustrated dictionary of plant terms (2 nd edition). Royal Botanic Gardens, Kew, London, 184 pp.
Blume, C.L. (1827) Enumeratio Plantarum Javae, fasc. 1. Apud J.W. van Leeuwen, Lugduni Batavorum [Leiden], 274 pp.  https://doi.org/10.5962/bhl.title.44901
Chen, J., Zeng, S.J., Zeng, L.Y., Nguyen, K.S., Yan, J.W., Liu, H. & Xia, N.H. (2022) Parahellenia, a new genus segregated from Hellenia (Costaceae) based on phylogenetic and morphological evidence. Plant Diversity 44: 389–405.  https://doi.org/10.1016/j.pld.2022.02.001
Gagnepain, F. (1902) [publ. 1903] Zingibéracées nouvelles de I’herbier du Muséum. Bulletin de la Société botanique de France 49: 247–269.  https://doi.org/10.1080/00378941.1902.10830936
Gagnepain, F. (1908) Zingiberaceae. In: Lecomte, H., Humbert, H. & Gagnepain, F. (Eds.) Flore générale de l’Indo-Chine, Vol. 6. Masson & Cie, Paris, pp. 25–130.  https://doi.org/10.5962/bhl.title.59355
IUCN (2012) IUCN Red List Categories and Criteria: Version 3.1. Second edition. Gland, Switzerland and Cambridge, UK, 32 pp.
Leong-Škorničková, J., Böhmová, A. & Trần, H.D. (2022) A new species and new combination in basally flowering Vietnam Costaceae. PhytoKeys 190: 103–111.  https://doi.org/10.3897/phytokeys.190.76494
Maas, P.J.M. (1979) Notes on Asiatic and Australian Costoideae (Zingiberaceae). Blumea 25: 543–549. [https://repository.naturalis.nl/pub/525131]
Meekiong, K., Ipor, I.B. & Tawan, C.S. (2008) A new Costus (Costaceae) from Sarawak, Borneo, Malaysia. Rheedea 18: 87–89.
Poulsen, A.D. & Specht, C.D. (2010) A new species of Costaceae from Borneo. Gardens’ Bulletin Singapore 62: 135‒142.
Schumann, K. (1904) Zingiberaceae. In: Engler, H.G.A. (Ed.) Das Pflanzenreich, Vol. 20. Wilhelm Engelmann, Leipzig, pp. 1–458.
Thiers, B. (continuously updated) Index Herbariorum: A global directory of public herbaria and associated staff. Available from: http://sweetgum.nybg.org/ih (accessed 12 January 2022)
Wu, T.L. & Larsen, K. (2000) Costaceae. In: Wu, Z.Y. & Raven, P. (Eds.) Flora of China, Vol. 24. Science Press & Missouri Botanical Garden Press, Beijing & St. Louis, pp. 320–321.