Any of several Eurasian plants of the genus Leonurus,especially L. cardiaca,a weed having clusters of small purple or pink flowers and spine-tipped calyx lobes. 益母草，茺蔚任一种生活于欧亚大陆的茺蔚属植物，尤指山艾属野草，开紫色或粉色小花串，生有尖端有刺的花萼裂片。
While all signs now point to Mexico as the epicenter, the genetic material in the virus there includes part of a swine influenza virus of Eurasian origin. 尽管所有迹象都指出墨西哥是疾病爆发的中心，但这种病毒的基因物质里却包含了部分起源于欧亚大陆的一种猪流感病毒。
