台灣的茜草科新記錄－－蘊璋耳草

Hedyotis koana Wang (Rubiceae) a Newly Recorded Plant in Taiwan

耳草屬為茜草科的一個大屬，全部約有150種主要分佈於熱帶及亞熱帶，台灣植物誌紀錄有10種，最近我們在台灣南部植物調查發現另一新紀錄植物－－蘊璋耳草；該植物的葉線形，頂生和上部腋生的聚傘花序以及花梗較長，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、彩色圖片與線描圖。 Hedyotis, comprising about 150 species in the tropical and subtropical regions of the world and is one of the largest genera in Rubiaceae. Ten species were recorded in the 2nd edition of Flora of Taiwan. In the course of our botanical inventory, Hedyotis koana Wang , heretofore unknown in Taiwan, was collected from southern part of the island. Hedyotis koana is easily distinguished from other congeners by narrow leaves, terminal or upper axillary cyme and long fl owering pedicles. In this report we provide a description, colored photographs and draw taken from the wild to aid identifi cation.