台灣新歸化十字花科植物——歐亞葶藶

Rorippa sylvestris (L.) Bess., a Newly Naturalized Mustard Species in Taiwan

歐亞葶藶（Rorippa sylvestris(L.) Bess.）為廣泛分布於亞洲西南部和歐洲之十字花科植物，最近新歸化於台灣中部武陵地區。本文描述其分類特徵、花粉形態、染色體數目、分布、生長環境。並與相關種濕生葶藶（Rorippa palustris）做比較。

Rorippa sylvestris (L.) Bess., a species of the Brassicacae widespread in SW Asia and Europe, was recently found naturalized at ca. 1500 m altitude in central Taiwan. Morphologically, R. sylvestris resembles R. palustris, both having deeply pinnatifid leaves, but can be distinguished from R. palustris by similar size pinnules, slender pedicels in fruiting stage (8-12 mm) and linear fruits. SEM micrographs of pollen grains, chromosome number, descriptions, line drawing and taxonomic notes are provided.