Abstract: A. Mongolicus is endemic, evergreen plant, in desert of China. It is also ancient relic species. Studies have indicated that A. mongolicus possesses very striking xeromorphic structures, for example, leaves possess dense epidermis, with thickened, and deeper and sunked stomata, and palisade tissues are well developed. Its water-holding power and heat resistance are also higher. These traits are beneficial to adapt drought, burning hot in summer and hard winter. Growth of A. mongolicus ia slow because its intensity of transpiration and photosynthesis are all very low.