台灣芸香科的新紀錄植物－－岩花椒

Zanthoxylum acanthopodium DC. (Rutaceae), a Newly Recorded Plant in Taiwan

花椒屬為芸香科的一個大屬植物，全球包含約有200種，台灣植物誌第二版紀錄有9種，最近我們在中部及東部植物調查時發現另一新紀錄植物—岩花椒；該植物以其葉軸具明顯的寬翼以及葉下表面側脈清楚等特徵，可明顯與台灣產本屬其他物種區別。本文提供該種的形態描述、線畫圖與彩色圖片。

Zanthoxylum, comprising about 200 species in the world, is a large genus of the family Rutaceae. Nine species were recorded in the 2nd edition of Flora of Taiwan. In the course of our botanical inventory, Z. acanthopodium DC., heretofore unknown in Taiwan, was collected from central and eastern part of the island. Z. acanthopodium is easily distinguished from other congenors by leaf rachises with conspicuous wings, and secondary veins of leaflet adaxially blades evident. In this report we provide a description and colored photographs taken from the wild to aid identification.