This naturalized perennial, 2-5 feet tall, was introduced from Europe. The tubular, two-lipped flowers are clustered around the axils of opposite leaves on a square stem (B). The distinctive leaves have 3-5 toothed lobes which attach to the stem on long stalks, each at right angles from the next pair on the stem (A,B). The white to pinkish upper lip of the flower is covered with fuzzy white hairs. The lower lip is divided into 3 lobes and has a number of purple dots in its throat (C). The flower is partially enclosed in a green calyx with sharp spines (C) which turn brown as the plant matures (D).  It lacks the odor of characteristic of many of the mints.