In recent years many alien adventive species found their ways toTaiwan. In this report we document the naturalization of the New WorldChromolaena odorata, a problematic weed, that is growing rampantly on southernpart of this island. A taxonomic account, line drawing, and distribution mapfor Taiwan with notes on this obnoxious weed are provided.

　　　　　原產美洲之香澤蘭（菊科）近年來大量歸化於台灣南部。香澤蘭為多年生蔓性草本，生長迅速，繁殖力強，植株並含植物相剋物質，在河谷向陽兩側、廢休耕地、崩塌地、林道邊坡、森林邊緣、牧場、火燒地區往往大量滋生，原生植被受其侵害至鉅。此外，香澤蘭之莖葉富含硝酸鹽，人畜誤食易中毒。本文提供其分類性狀描述、植物繪圖以及在台灣之分布圖。