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Article
Published: 2020-01-23

Didymoplexiella laosensis (Orchidaceae: Epidendroideae: Gastrodieae), a new holomycotrophic orchid from Lao PDR

Flora Conservation Department, Kadoorie Farm and Botanic Garden, Lam Kam Road, Lam Tsuen, Tai Po, New Territories, Hong Kong S.A.R., People’s Republic of China
Ministry of Science and Technology, Biotechnology and Ecology Institute, Vientiane, Laos
Flora Conservation Department, Kadoorie Farm and Botanic Garden, Lam Kam Road, Lam Tsuen, Tai Po, New Territories, Hong Kong S.A.R., People’s Republic of China
Flora Conservation Department, Kadoorie Farm and Botanic Garden, Lam Kam Road, Lam Tsuen, Tai Po, New Territories, Hong Kong S.A.R., People’s Republic of China
Keywords Didymoplexis Didymoplexiopsis Indo-Burma Biodiversity Hotspot Monocots

Abstract

Didymoplexiella laosensis is described as a new species from the limestone mountains of Vang Vieng District in central Laos. A detailed description, colour plate, line drawings and conservation assessment are provided, together with morphological comparisons with three allied species in tropical Asia, namely, D. ornata, D. siamensis and D. trichechus. With the leasing of its limestone habitat to a mining company for cement production, the threat to D. laosensis is already evident.