cowbane

詳細解釋：

cow.bane

n.（名詞）
A perennial North American herb(Oxypolis rigidior) having pinnately compound leaves and umbels of small white flowers.
毒牛芹：一種生長於北美洲的多年生草本植物（毒牛芹） ，生有羽狀的複葉，開傘狀小白花
Any of several related plants, such as the water hemlock.
毒芹：任一種類似植物，如毒芹