Yunnan is the place which has the largest number of plants in China and is called the kingdom of plant. Almost all kinds of climate can be found in Yunnan,from tropical, subtropical to temperate and frigid. There are estimated 17 thousand species of higher plants in Yunnan Province, which belongs to 274 families, 2076 genera, accounting for 62.9% of the total China higher plants. The northwest of Yunnan is the core area of Hengduan Mountains and has plenty alpine flowers. The south part of Yunnan is tropical area with tropical plants. And the Southeast of Yunnan is typical karst forest which has some unique flowers such as Paphiopedilum, also called lady slipper orchid.