Latin: Achillea millefolium
An “astringent, alterative, a diuretic, and a tonic … used to stop [bleeding] … in the treatment of colds, influenza, measles, smallpox, chickenpox, fevers… Yarrow acts as a blood cleanser and opens the pores to permit free perspiration, taking along with it, unwanted waste and thus relieving the kidneys.” (Robert Thomson, in “The Grosset Encyclopedia of Natural Medicine” (1980))
Yarrow is a “stimulating diaphoretic and tonic” (Menzies-Trull in "The Herbalist's Prescriber")
“Diaphoretic, hypotensive, astringent, diuretic, antiseptic … Yarrow is one of the best diaphoretic herbs and is a standard remedy for aiding the body to deal with fevers. It lowers blood pressure … stimulates digestion …” (David Hoffman in “The New Holistic Herbal”).