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Êǹ¾Ä¡ÉÈÒʵÃÊÁà´ç¨¾Ãйҧ਌ÒÊÔÃÔ¡ÔµÔìDiversity of Thai Native OrchidsOrchidaceae ranks as the largest floweringplant family with approximately 900 genera with25,000 species worldwide. Orchids grow naturallyon every continent with habitats ranging from theequator and throughout the northern and southernhemispheres. However, the greatest diversity andabundance of orchids is found in tropical regions.In Thailand, native orchids grow in alltypes of vegetation. They have been foundabundantly in Doi Inthanon National Park and DoiChiang Dao Wildlife Sanctuary in the north;Phu Luang and Phu Rue Wildlife Sanctuary andPhu Kradueng National Park in the northeast;Khao Luang National Park in the south; KhaoSoidao Wildlife Sanctuary in the east; Huay KhaKhaeng and Thung Yai Naresuan WildlifeSanctuary in the southwest; and Khao YaiNational Park in the center of the country.24