We discovered that 46 families accounting for 50.0% of the 92 families are from the tropical plant flora and display a clear superiority,and that the 29.3% of ,belonging in 27 families,are from temperate zone.

• 从科的区系分析发现:来自热带植物区系的有46科,占总科数的50 0%25,具有明显优势; 来自温带的27科,占29 3%25。