臺灣新歸化植物──伏生金鈕扣

Acmella repens (Asteraceae), a newly naturalized plant in Taiwan

本文報導新歸化於臺灣北部的菊科植物—伏生金鈕扣（Acmella repens (Walter) Rich.）。該種原生於熱帶與亞熱帶美洲，其形態與其他臺灣已記錄的金鈕扣屬物種相比，伏生金鈕扣的舌狀花相當顯眼，花瓣長度達3–6 mm，而莖通常伏生或匍匐生長。

A newly naturalized species from the Northern part of Taiwan, Acmella repens (Walter) Rich., native to tropical and subtropical regions of the Americas, is reported herein. This species is distinguished from other Acmella species in Taiwan by its conspicuous ray flowers, with limb lengths of 3–6 mm, and its predominantly decumbent or prostrate stems.