This flowering herb grows throughout North America and is typically found in fields and meadows. The plant grows 1 to 3 feet tall and has white, umbrella-like clusters of flowers at the top of its stalks. Yarrow’s leaves can be applied to bleeding wounds to stimulate clotting, and drinking a tea from its flowers can be a remedy for a variety of ailments including colds, flu, headaches, diarrhea and stomach ulcers.