直立黃細心（紫茉莉科）——臺灣新的外來植物

Boerhavia erecta L. (Nyctaginaceae), A New Adventive Plant in Taiwan

作者於臺灣南部高雄巿至臺中一帶沿鐵道的開濶地發現一種新的紫茉莉科外來植物－直立黃細心（Boerhavia erecta L.），與黃細心（Boerhavia diffusa L.）同屬。前者植株直立或基部斜傾，花序腋生或頂生，胞果光滑呈倒圓錐狀，可與後者區別。本文描述其形態特徵、生育環境，並提供植物繪圖及檢索表。

Boerhavia erecta L., a new adventive weed has recently been found growing along the Kaohsiung-Taichung railroad. It can be distinguished from B. diffusa L. by its ascending to erect habit, white to pink flowers and obconical glabrous fruit. The diagnostic key to species in Taiwan and the botanical description, along with a line-drawing illustration of the species, are given.