Adaptation of leaf anatomical characteristics of eleven understory species to different environments in coniferous plantations Biosystematic Relationships and Leaf Anatomical Characteristics of Plants of Three Genera in Hordeinae(Poaceae) Responses of the anatomical characteristics of plant leaf to long-term grazing under different stocking rates in Inner Mongolia steppe Biosystematic Relationships and Leaf Anatomical Characteristics of Three Sects’ Plants in Elymus (Poaceae) Study on leaf anatomical characteristics of dominant spedes of rehabilitation vegetation in Heshan