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An inventory of orchid species diversity was carried out in cloud forest of Genting Highlands,which is one of the most developed highland areas in Peninsular Malaysia.Since 1967,construction of roads and hotel complexes has had a serious impact on its physical environment and vegetation.Habitat destructions together with climate change might have caused some orchid species to be extirpated locally or extinct.The cloud forest of Genting Highlands consists of 4 major peaks,Gunung Ulu Kali,Gunung Chin Chin,Gunung Lari Tembakau and Gunung Mengkuang.Combined findings from the current study,previous published works and specimens deposited in local and abroad herbaria,an updated list of orchid species found in the cloud forests of Genting Highlands is presented.A total of 146 orchid taxa were recorded,comprises of 51 genera,143 species,1 subspecies and 2 varieties,of which 46 are new records to Genting Highlands.Previous studies by Ridley (1914&1924),Holttum (1953&1964),Null (1972),Stone (1981),Seidenfaden & Wood (1992) and Kiwe (1982)documented a total of 88 species of orchids found in the summit region of Genting Highlands,of which only 43 species were recovered whilst 45 species which were mostly strict montane species were not recovered during this study.