Abutilon hulseanum (Torr. & A. Gray) Torr. ex A. Gray (Malvaceae), a Newly Naturalized Plant in Taiwan

臺灣新歸化錦葵科植物－－疏花莔麻

A newly naturalized plant, Abutilon hulseanum (Torr. & A. Gray) Torr. ex A. Gray (Malvaceae), native to the tropical Americas, has recently been found in low elevation of central Taiwan . It is a newly recorded species to the flora of this island. A detailed description, line-drawings, photographs and geographic distribution are provided for identification of this species. The morphology of A. hulseanum is very similar to A. grandifolium (Willd.) Sweet, and is distinguished from features of petiole, flowers and mericarps. 本文首次報導原產熱帶美洲，目前已歸化於臺灣中部低海拔區的疏花莔麻（Abutilon hulseanum （Torr. & A. Gray） Torr. ex A. Gray ）。描述其形態特徵、地理分佈及生育地環境，並提供彩色圖片與線繪圖以資辨識，另外比較與其相似種大葉莔麻（A. grandifolium （Willd.） Sweet）在外觀形態特徵差異。