Paeonia suffruticosa var. spontanea is an endemic to China, being one of the state-protected third-grade threatened plants. It distributes only in Majiagou, Jishan belonged to the tip of Luliang Ranges, Shuiyukou, Yongji belonged to the western of Zhongtiao Ranges in Shanxi and Huashan Mountains, Huanglong Mountain, Tongchuan and Wanhua Mountain, Yan'an in Shaanxi, respectively. The distribution region is located in 109°05′～110°57′E , 34°29′～35°05′ N, and above sea level from 1000m to 1800m. The zonal...