The characteristics of soil and vegetation of degenerated alpine steppe in the Yellow River Source Region Community characteristics of Stipa purpurea stepp in the Qinghai Lake region Effects of Temperatures on Seed Germination Characteristics of Alpine Plant Stipa purpurea (Poaceae)* Intraspecific Variation of Leaf Epidermal Cuticle Waxes under Scanning Electronic Microscope:Stipa purpurea and Oxytropis microphylla from the QinghaiTibet Plateau Isolation and identification of endophytes infecting Stipa purpurea, a dominant grass in meadows of the Qinghai-Tibet Plateau Interspecific associations analysis of Stipa purpurea community in Tuotuo River Area Effect of grazing on community characteristics and species diversity of Stipa purpurea alpine grassland in Northern Tibet Quantitative classification and ordination of Stipa purpurea steppe community in source region of the Yangtze River COMMUNITY CHARACTERISTICS OF STIPA PURPUREA STEPPE IN SOURCE REGIONS OF CHANGJIANG AND HUANGHE RIVERS, CHINA Comparative Physiological and Molecular Analyses of Intraspecific Differences of Stipa purpurea (Poaceae) Response to Drought Simulation of Stipa purpurea distribution pattern on Tibetan Plateau based on MaxEnt model and GIS VARIATION OF LEAF STRUCTURE OF TWO DOMINANT SPECIES IN ALPINE GRASSLAND AND THE RELATIONSHIP BETWEEN LEAF STRUCTURE AND ECOLOGICAL FACTORS Comparative Physiological and Molecular Analyses of Intraspecific Differences of Stipa purpurea (Poaceae) Response to Drought Quantitative Classification and Ordination of Stipa purpurea Steppe Community in Qinghai Plateau