Effects of water levels on the growth and reproductive characteristics of Carex brevicuspis growing on sites with different elevations A STUDY ON IN VITRO CLONAL PROPAGATION OF MEI FLOWER (PRUNUS MUME SIEB. ET ZUCC.) Fitness analysis of seed- and vegetative reproduction of clonal tree Symplocos laurina FUNCTIONS OF BRANCHES OF THE CLONAL TREE SYMPLOCOS LAURINA Techniques of Tissue Culture and in vitro Clonal Propagation of Ilex latifolia Studies on plantlet regeneration from the mature leaves of Dioscorea zingiberensis Effects of Naphthalene Acetic Acid on the Shooting Growth and Aboveground Biomass of Hemarthria compressa STUDIES ON CIRCULTION METHOD OF VEGETATIVE PROPAGATION OF POPULUS TOMENTOSA AND P.HOPEIENSIS Clonal Propagation of Gynostemma pentaphyllum (Thunb.) Makino in Test Tube VALLISNERIASPECIES IN LAKES OF THE MIDDLE-LOWER REACHES OF THE YANGTZE RIVER OF CHINA Effect of simulated ortet density on growth and clonal propagation of Iris japonica