江西省地处我国中亚热带东部,在植物区系划分上属泛北极植物区、中国—日本植物亚区,并且是这一亚区的核心部分。在世界植物区系的起源上,江西处在古北极和古亚热带两个植物区系相交接地带。从中生代侏罗纪起,江西的地史和气侯变化都比较小,所受的历次冰川破坏作用的影响不大,一直处于比较稳定的温暖湿润气侯条件下, Jiangxi Province is located in the eastern subtropics of China. It is a pan-Arctic plant zone, China-Japan Plant Sub-zone, and is a core part of this sub-region. In the origin of the world flora, Jiangxi is located in the ancient Arctic and the ancient subtropical flora of the junction zone. Since the Jurassic in the Mesozoic, Jiangxi Province has a relatively small change in its geo-history and climate, and has had little effect on the destructive effects of glaciers since its establishment. It has been under relatively stable and warm climatic conditions,