a herbaceous plant of the daisy family, with broad leaves and burred fruits. It originated in tropical America but is now cosmopolitan 欧龙牙草;苍耳。 参见 clotbur
Genus Xanthium, family Compositae: two or three species, in particular X. strumarium 苍耳属,菊科:2 或3种,尤指欧洲苍耳