Yarrow (Achillea millefolium) is a perennial herbaceous plant. The rhizome is thick, creeping, and branched. The stems are solitary, and up straight. The flowers are small, white or pink in color, collected in small inflorescences - baskets, which in turn form a common corymbose inflorescence from numerous baskets. The fruit is a flat, oblong silver-gray achene. Yarrow blooms from June to the end of summer, the seeds ripen in July - September.