N a perennial Mediterranean plant, Cardaria (or Lepidium) draba, with small white flowers: a widespread troublesome weed: family Brassicaceae (crucifers) 白水槿
N（名词） a perennial Mediterranean plant, Cardaria (or Lepidium) draba, with small white flowers: a widespread troublesome weed: family Brassicaceae (crucifers) 白水槿