From the point of view of genera geographical distribution area types,the proportion of Pan-tropic distribution genera was highest,that of tropic Asian distribution genera was the second,that of old world tropic distribution genera was the third.

• 从属的地理分布区类型来看 ,以泛热带分布属的比例最高 ,其次是热带亚洲分布属、旧世界热带分布属。