通过对山东半岛植物小区、辽东半岛植物小区、鲁中南低山丘陵植物小区和属于华北山地亚地区的北太行山-恒山植物小区属的相似性系数以及属的分布区类型的UPGMA分析，结果表明：山东半岛植物小区和鲁中南低山丘陵植物小区的相似性程度高，关系近，而辽东半岛植物小区与北太行山-恒山植物小区的相似性程度高，关系近，所以把山东半岛植物小区和辽东半岛植物小区划入同一个植物区系亚地区是不合理的，建议把辽东半岛植物小区划归到华北山地亚地区，原辽东、山东丘陵植物亚地区改名为山东丘陵植物亚地区。
This paper compares the flora of the Shandong peninsula with the neighboring floras on the south-central low hills of Shandong, the Liaodong peninsula and the northern Taihang and Heng mountains as a means to determine the appropriate classification for the Shandong and Liaodong peninsula floras. Shandong peninsula flora and the low hills flora of south-central Shandong have high homologies and a close relationship determined by similarity coefficients of genera. An UPGMA analysis illustrated a strong clustering of spermatophyta genera among Shandong peninsula, Liaodong peninsula and the north Taihang-Heng mountain floras. Our results do not support the view of Wu Zhengyi and Wang Hesheng who suggested that the Shandong peninsula flora and Liaodong peninsula flora should be divided into different subregions. The authors suggested that the Liaodong peninsula flora should be divided into the North China mountain flora and the Shandong-Liaodong hill be renamed as the Shandong hill subregion flora. Previous China vegetation classifications were based on the view that the Liaodong peninsula flora belonged to the warm temperate northern deciduous Quercus subzone and Shandong peninsula flora belonged to the warm temperate southern deciduous Quercus subzone.