Yarrow, it's easy to grow and easy to kill.
When you see yarrow, your first reaction could be to destroy the intruder. As young plants, yarrow looks like a frilly weed. A young leaf is better described as a feather than a fern. Once established, yarrow will spread freely. You are likely to find it in your lawn or beds and probably both.
As I learned to recognize the young plants, I allowed them to flourish at the base of a trellised jasmine. The yarrow serves well as a garnish beneath my canopy of yellow flowers.
Yarrow is great when used as an accent plant. It is available in both white and yellow varieties.