baccata living in Baicheng have thick leaves and big epidermic cells, which palisade parenchyma is composed to 2 layer cells. Its leaves have aerenchyma and big vessel. Its petioles have big epidemic cells, stomata and substomatal chamber.

• 白城地区生长的山丁子叶片较厚,表皮细胞也较大,栅栏组织有两层细胞构成,海绵组织均疏松,形成通气组织,叶片主脉的导管管径比较大,而长春地区生长的山丁子叶仅有一层栅栏组织,白城地区的山丁子叶柄的表皮细胞较大,有气孔和孔下室。