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重新定义后的中国斯蒂芬期植物群所对应的岩石地层单元只限于太原组下部晋祠段。该植物群以石松纲、楔叶纲、真蕨纲和种子蕨纲为主，也有一定数量的瓢叶纲和科达纲植物分子。尽管中国斯蒂芬期植物群与欧美同期植物群有一定共性，但二者差别仍很明显。
The redefined rock formation unit of the Chinese Stephenian flora is only limited to the Jinci section at the lower part of the Taiyuan Formation. The flora mainly consists of Shimatophyta, Cucurbitaceae, Genus Fern and Seeds Fern. There are also some Scleractinia and Kodak plant elements. Although the Chinese Stephans flora has some similarities with the flora of the same period in Europe and the United States, the difference between the two is still evident.