Summary
Included here is Guangxi, Guizhou and northern parts of the Yunnan region. In topographical terms it comprises the Tata Shan Mountains, the Szechwan Basin, part of the Kweichow Plateau and southern part of the Great Chinese Plain. Along an east-west axis, it extends the entire length of the Yangtze River.
Of the endemic and near endemic vascular plants so far recorded there are about 292 species in 184 genera and 79 families. There are 28 endemic genera (marked red) and 4 endemic families (marked purple).
References
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Hu, S. Y. 1980. The Metasequoia flora and its phytogeographical significance. Journal of the Arnold Arboretum, 60: 41-94.
López-Pujol, J., Zhang, F-M., Ge, S. 2006. Plant biodiversity in China: richly varied, endangered, and in need of conservation. Biodiversity and Conservation, 15: 3983-4026.
Xie, Z. 2003. Characteristics and conservation priorities of threatened plants in the Yangtze valley. Biodiversity and Conservation, 12: 65-72.
Zhang, Yin-Bo & Ma Ke-Ping. 2008. Geographic distribution pattern and status assessment of threatened plants in China. Biodiversity and Conservation, 17: 1738-1798.