ragwort

noun

1. 千里光，狗舌草（开黄色小花，能毒害牛马）
   a wild plant with yellow flowers, poisonous to cows and horses

1. Large red-and-black European moth; larvae feed on leaves of ragwort; introduced into United States to control ragwort.
   大型红色和黑色的欧洲蛾子；幼虫吃千里光属植物的叶子；为控制千里光（狗舌草）而引入美国。

noun

1. American ragwort with yellow flowers

   Synonym:    butterweedSenecio glabellus

2. widespread European weed having yellow daisylike flowers

   Synonym:    tansy ragwortragweedbenweedSenecio jacobaea