Skullcap is an herbaceous perennial mint with ridged leaves and tiny flowers that can range in color from purple and blue to pink and white. The two-lobed flowers resemble the military helmets worn by early European settlers, hence the herb's name. A hardy plant, it grows 1 to 4 feet (25 cm to 1 m) high, thriving in the woods and swamplands of eastern North America. Settlers in the late 1700's promoted the herb's effectiveness as a cure for rabies, giving rise to one of its common names, mad dog weed. This claim was later discarded, and herbalists began to focus on the plant's considerable value.Skullcap is a comforting herb, traditionally used to alleviate nervous tension and exhaustion. It is used to promote emotional wellbeing and relaxation during times of occasional distress. Skullcap is traditionally used for trouble sleeping (insomnia), anxiety, stroke, and paralysis caused by stroke. It is also used for fever, high cholesterol, “hardening of the arteries” (atherosclerosis), rabies, epilepsy, nervous tension, allergies, skin infections, inflammation, and spasms.