Sweet, low growing perennial with a creeping habit and upright flowering stems with compact purple flowers all summer. Prefers part shade and ample moisture. These plants can handle severe neglect and survive. Traditionally, this herb has been used for healing a variety of wounds and skin problems. The aerial parts of the plant are astingent and antiseptic. It has also been used internally for sore throats, bleeding gums, and hemorrhoids. In Chinese medicine the cooling flowers stimulate the liver and gallbladder when these systems are out of balance. Easy to grow and great ground cover in a shadier garden. Perennial Hardy to zone 4.