Most of the naturalized species originated from the Tropical Americas and South America.The majority of the naturalized flora is in the form of herbs with 22 percent being aquatics.

• 国外来源地最主要来自热带美洲及南美洲，以菊科、禾本科、豆科的种类最多，生活型以草本植物佔绝大多数，有22 %25为水生植物。