Nordic Journal of Botany 26: 257Á316, 2008 doi: 10.1111/j.1756-1051.2008.00265.x, # 2008 The Authors. Journal compilation # Nordic Journal of Botany 2008 Subject Editor: Henrik Ærenlund Pedersen. Accepted 13 October 2008 An annotated checklist of the Orchidaceae of Laos Andre´ Schuiteman, Pierre Bonnet, Bouakhaykhone Svengsuksa and Daniel Barthe´le´my A. Schuiteman (
[email protected]), Nationaal Herbarium Nederland, Univ. Leiden, PO Box 9514, NLÁ2300 RA Leiden, the Netherlands. Á P. Bonnet, CIRAD and UM2, UMR AMAP, FRÁ34000 Montpellier, France. Á B. Svengsuksa, National Univ. of Lao PDR, Faculty of Science, Dept of Biologie, PO Box 7322, Vientiane, Laos PDR. Á D. Barthe´le´my, INRA, UMR AMAP, FRÁ34000 Montpellier, France. A checklist is presented of the orchid flora of Laos, enumerating 485 species in 108 genera. An estimate is given of the expected size of the orchid flora of Laos. Notes on habitat, global and local distribution, endemism, conservation, phenology, as well as a systematic overview complement the checklist. Origin of the checklist Á The karst formations and montane forests in the Lak Xao district, Bolikhamxai province. The checklist presented below grew out of a UNESCO Á Various sites in the Phou Khao Khouay NBCA, project (reference no. 27213102 LAO) and the ORCHIS Vientiane and Bolikhamxai provinces. project (Bhttp://www.orchisasia.org/). The first, entitled Á The Phou Phanang NBCA, Vientiane prefecture. ‘Systematic study of the wild orchids in Lao P.D.R. and Á The Louangphrabang district, Louangphrabang pro- their conservation’, was conducted during the year 2005 by vince. Bouakhaykhone Svengsuksa. Some 700 living orchid speci- Á The Oudomxai district, Oudomxai province.