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Photo: Rolf Engstrand, CC BY-SA 3.0 (via Wikimedia Commons)

Mad Dog Skullcap

Scutellaria lateriflora

Also known as Skullcap, Blue Skullcap, Hoodwort, Helmet Flower

At a glance
Family
Lamiaceae (mint family)
Type
Herbaceous perennial
Parts used
Aerial parts (leaves, stems, and flowering tops)
Size
1 to 3 feet tall
Bloom
Summer, small blue-violet flowers from June through September
Habitat
Wet meadows, marshy ground, streambanks, and damp woodland edges across North America
Acquisition
Grow or buy

Key benefits

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Eases nervous tension
Supports restful sleep
Calms occasional worry
Traditionally soothes overwork

Traditional uses

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Skullcap grows quietly at the edges of ponds and wet meadows, its tiny blue helmet-shaped flowers easy to miss until you know to look for them. Cherokee and other Indigenous healers used it as a women's herb and a calming nervine long before European settlers arrived, and by the 1800s it had become a staple of American eclectic medicine, prescribed for restlessness, nervous exhaustion, and what old herbals called "the fidgets." Its unsettling common name, mad dog skullcap, comes from an 18th-century belief that it could treat rabies, a use later abandoned, though the calming reputation endured and only grew stronger. Generations of herbalists have since reached for it as one of the gentler nervines in the garden, a plant to steep at the end of a long day.

How to grow & use it

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The full apothecary for Mad Dog Skullcap

Traditional remedies and step-by-step preparations, a complete growing guide, and how to harvest, dry, and store it, all unlocked with HerbLens Unlimited.

  • ✦Remedies & preparations
  • ✦ Growing guide
  • ✦Harvest & storage
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Pairs well with
  • ✦Chamomile
  • ✦Lemon Balm
  • ✦Passionflower
Substitutes
  • ✦Passionflower
  • ✦Lemon Balm
Choose it when

“For the evenings when your thoughts won't quite lie down and rest.”

Did you know?

The plant's small flower has a curious bump on its upper lip that early botanists thought resembled a tiny medieval helmet, or skull cap, which is how this humble wetland mint got its name.

Safety

Skullcap has occasionally been adulterated with germander, a lookalike herb that can cause liver injury, so buy from a reputable supplier. Its calming effect can add to sedatives, sleep aids, or alcohol, and it is not established as safe in pregnancy or breastfeeding.