A perennial, with a fibrous, yellow rootstock producing a branching stem, 1-3 feet high, Leaves are opposite, ovate to lance-shaped and toothed. The axillary, pale purple or blue, 2-lipped, hooded flowers are in I-sided racemes from the leaf axils. Found in eastern and central U.S. in rich woods, and moist thickets. It is a antispasmodic,
