The plant common yarrow, or herba sanguinaria (Achillea millefolium).
A bloodthirsty person.
Eager to shed blood; bloodthirsty.
Involving bloodshed.
Consisting of, covered with, or similar in appearance to blood.
Achillea millefolium or common yarrow, a flowering plant widespread in the temperate Northern Hemisphere, formerly and sometimes used to stanch the flow of blood.