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Type: Article
Published: 2023-03-07
Page range: 245–260
Abstract views: 54
PDF downloaded: 3

A revision of Geostachys (Zingiberaceae: Alpinioideae) in Cambodia, Laos and Vietnam, including a new species, G. aristata

The Herbarium, Singapore Botanic Gardens, 1, Cluny Road, 259569 Singapore
Vietnam National Museum of Nature, Vietnam Academy of Science and Technology, 18, Hoàng Quốc Việt Street, Cầu Giấy, 122300 Hà Nội, Vietnam
Becamex Institute of Research and Development, Becamex IDC Corp., 08, Hùng Vưõng Street, Hòa Phú Ward, Thủ Dầu Một City, Bình Dưõng Province, Vietnam, Southern Institute of Ecology, Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 1D, TL29 Street, District 12, Hồ Chí Minh City, Vietnam
Southern Institute of Ecology, Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 1D, TL29 Street, District 12, Hồ Chí Minh City, Vietnam
Joint Russian-Vietnamese Tropical Scientific and Technological Center, Nguyễn Vãn Huyên street, Cầu Giấy, Hà Nội, Vietnam, Department of Higher Plants, Biological Faculty, M.V. Lomonosov Moscow State University, 1, 12, Leninskie Gory, 119234 Moscow, Russia
Monocots Alpinieae Eastern Indochina Geostachys annamensis Geostachys pierreana gingers lectotypification


A revision of the ginger genus Geostachys (Zingiberaceae: Alpinioideae: Alpinieae) in Cambodia, Laos and Vietnam is presented. Three species are formally recognised, all endemic to the area of study, including one new species from central Vietnam. Lectotypes are designated for G. annamensis and G. pierreana. The uncertainty about the type locality of G. pierreana is highlighted; the absence of this species in Thailand and Vietnam is demonstrated. The presence of Geostachys in Laos is discussed. The key to the species of the genus is provided. For each species, description, notes on etymology/eponymy, distribution, IUCN preliminary assessment, habitat and phenology, and taxonomy are given. The newly described species, G. aristata, is compared to the morphologically closest congener, G. annamensis, from which it differs by green leaf sheaths and ligules, greenish bracts and bracteoles with prominently aristate apices, prominently mucronate calyx lobes and labellum with crimson spots extending to the margins.


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