A biennial Eurasian thistle (Cirsium vulgare) in the composite family, naturalized in North America and having heads of purplish flowers and spiny stems and leaves.

• 牛蓟：一种两年生的欧亚蓟类菊科（矛叶蓟蓟属）植物，原产于北美，有紫色的花和多刺的式与叶