台灣新歸化菊科植物－－方莖鹵地菊

Melanthera nivea (L.) Small (Asteraceae), A Newly Naturalized Plant in Taiwan

原產美國東南部至中南美洲的菊科植物－－方莖鹵地菊（Melanthera nivea(L.) Small），近來發現歸化於臺灣南部路旁荒地。本物種的植株直立或斜升、莖近四稜形、花冠白色、無舌狀花等特徵可與雙花蟛蜞菊及天蓬草舅區別。 A new naturalized plant, Melanthera nivea (L.) Small, which is native to the Southeastern America, West Indies and Central America, was found naturalized in a disturbed field in southern Taiwan. It is distinct from Melanthera biflora (L.) Wild and Melanthera prostrata (Hemsl.) W. L. Wagner & H. Rob. by plant erect or scandent, stems square, corolla white and only with disc florets in head.

A new naturalized plant, Melanthera nivea (L.) Small, which is native to the Southeastern America, West Indies and Central America, was found naturalized in a disturbed field in southern Taiwan. It is distinct from Melanthera biflora (L.) Wild and Melanthera prostrata (Hemsl.) W. L. Wagner & H. Rob. by plant erect or scandent, stems square, corolla white and only with disc florets in head.