Genetic Diversity and Population Genetic Structure of Arceuthobium sichuanense Effects of Arceuthobium sichuanense infection on photosynthesis and transpiration of Picea wilsonii Anatomical Study on Endophytic System of Dwarf Mistletoe (Arceuthobium sichuanense) Materials for Chinese Viscoideae Materials for Chinese Viscoideae Flowering Characteristics and Chemical Control of the Buds of Arceuthobium sichuanense