Achillea

noun

Achil·​lea ˌak-ə-ˈlē-ə, ə-ˈkil-ē-ə 

: a large genus of temperate composite herbs of the northern hemisphere that have divided leaves and small heads of disk and ray flowers, are a source of achilleine, and include one (A. millefolium) formerly widely used as a medicinal herb