Study on niche of population of Ulmus lamellosa in the south area of Shanxi province Phenotypic Diversity of Leaves Morphologic Characteristics of Ulmus lamellosa Natural Populations in Shanxi Interspecific relationship of rare and endangered Ulmus lamellosa community in Taiyue Moutain of Shanxi Interspecific Segregation of Rare and Endangered Plant Ulmus lamellosa Communities in Shanxi Province Functional Diversity of Ulmus lamellosa Community in the Taiyue Mountain of Shanxi Ecological Gradient Analysis and Environmental Interpretation of Ulmus lamellosa Communities in the Taiyueshan Reserve, Shanxi Study on Ulmus lamellosa Community Characteristics and Species Diversity in the South of Shanxi Phenotypic Diversity of Leaves Morphologic Characteristics of Ulmus lamellosa Natural Populations in Shanxi