The floristicregion of Dian (Yunnan) -Qian (Guizhou )-Gui (Guangxi) has the highest Castanopsis species diversity in China, with 29 species .
中国栲属植物最丰富的地区是滇黔桂地区（29 种） 。
2
The Arctic region is broken into three floristic zones (High, Low and Sub Arctic), referring to the amount of plant life that exists within the regions' boundaries.
根据区域边界内的植物数量，北极地区可以划分成三个植物区系(分别是高北极，低北极和次北极)。
3
As one of the zonal vegetation types of the mid-subtropical region of China, its floristic composition consists of 140 species of vascular plants of 100 genera in 58 families.