Unwelcome naturalization of Chromolaena odorata (Asteraceae) in Taiwan.

In recent years many alien adventive species found their ways to Taiwan. In this report we document the naturalization of the New World Chromolaena odorata, a problematic weed, that is growing rampantly on southern part of this island. A taxonomic account, line drawing, and distribution map for Taiwan with notes on this obnoxious weed are provided.