Pycnanthemum incanum - Herbaceous perennial herb. 60-120 cm height, 100 cm height. Hardy, easily grown plant. White to lavender flowers. Flowers excellent food source for bees and butterflies. Vigorous clump forming grower, spreading by rhizomes. Can become invasive. Grow in full sun to part shade. Medicinal plant, used by native Americans. Leaves used fresh or dried to make a tea. Leaves have a strong minty aroma. In the wild a food source for large mammals. Enjoys a rich soil, and regular watering in the growing season. Endangered in some of its natural habitat areas.