THE PHYTOCOENOLOGICAL FEATURES OF MIXED NEEDLELEAF AND BROADLEAF FOREST ON SUBTROPICAL MOUNTAIN IN GUANGXI Study on the characteristics of Forsythia suspensa community in Taiyue wood district Eco-geographic Distribution and Coenology Characteristics of Cupressus gigantea Characteristics of Riparian Rare Plant Communities on the Shennongjia Mountains,Central China The Phytoeoenological Features of Mixed Evergreen and Deciduous Broadleaf Forest on Yellow-brown Soil Mountain in Guangxi