1. small woolly perennial herbs having small whitish discoid flowers surrounded by a ring of club-shaped bristles. 
   一个具绵毛的多年生小型草本属，具小白色盘状花的头状花序，有棒状刚毛形成的冠毛。
2. A Mediterranean thistlelike plant(Cynara scolymus) in the composite family, having pinnately divided leaves and large discoid heads of bluish flowers. 
   洋蓟一种菊科地中海的蓟类植物（菜蓟属洋蓟属），有羽状全裂叶和蓝色花朵的盘状花头
3. Any of several weedy North American plants of the genus Erechtites, having small white or greenish flowers grouped in discoid heads. 
   菊芹几种北美菊芹属植物中的任意一种，有在花盘上聚在一起的小白花或略带绿色的花朵
4. common North American weed with linear leaves and small discoid heads of yellowish flowers; widely naturalized throughout temperate regions; sometimes placed in genus Erigeron. 
   北美洲常见杂草，有线形叶子和圆盘状黄花头状花序；温带地区广泛引入；常归为飞蓬属植物。
5. coarse herbs with whitish discoid flower heads and silky pappus. 
   一个粗糙的草本属，白色盘状的头状花序，具绢毛状的冠毛。

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