COMMUNITY STUDIES ON THE STATUS OF THE ENDANGERED PLANT, BERCHEMIELLA WILSONII VAR. PUBIPETIOLATA, USING INTERSPECIFIC ASSOCIATION ANALYSIS GENETIC DIVERSITY IN FRAGMENTED POPULATIONS OF BERCHEMIELLA WILSONII VAR. PUBIPETIOLATA, AN ENDANGERED PLANT ENDEMIC TO EASTERN CHINA Studies on Traits of Concomitant Community of Endangered Plant Berchemiella wilsonii Tissue Cultures of Berchemiella wilsonii var.pubipetiolata Niche Characteristics of Berchemiella wilsoni var.pubipetiolata,An Endangered Species in China A Preliminary Study on Dormancy and Germination Physiology of Endangered Species Berchemiella wilsonii (Schneid.) Nakai var.pubipetiolata H.Qian Seeds Drup and seed morphology of the Berchemia and Berche-miella(Rhamnaceae)and its systematic significance