Boreal Yarrow (Achillea millefolium var. borealis) is a tall (2’-3’) perennial often found on roadsides and in fields.  Yarrow is a colonizer and spreads well providing mid to late summer color from its clusters of small white flowers that occasionally appear with a slight rose undertone.  Although yarrow has been used for a variety of medicinal purposes in may cultures we do not recommend consuming any part of this plant.