Botanical Overview
American Pennyroyal (Hedeoma pulegioides) belongs to the Lamiaceae family. Limited but reliable traditional records indicate this plant has recognized medicinal applications in one or more healing traditions. The mint family (Lamiaceae) includes aromatic herbs and shrubs with square stems, opposite leaves, and two-lipped flowers. Many species produce essential oils in glandular trichomes on their leaves and stems. This family is one of the most important sources of culinary and medicinal herbs worldwide.
General Description
Hedeoma pulegioides, also known as pennyrile, American pennyroyal, or American false pennyroyal, is a species of Hedeoma native to eastern North America, from Nova Scotia and southern Ontario west to Minnesota and South Dakota, and south to northern Georgia and Arkansas.
Family Context
The Lamiaceae family is large and widely distributed. Notable medicinal members include:
- Basil — 86 documented uses
- Rosemary — 60 documented uses
- Agbo — 54 documented uses
- Sage — 49 documented uses
Geographic Distribution
American Pennyroyal has been recorded in 7 countries and territories worldwide, including Brazil, Canada, Italy, Mexico, Sweden, and others.
Traditional Uses
American Pennyroyal has been traditionally used for digestive health, respiratory conditions, and pain and inflammation, among other applications.
Digestive health.
- Colic
- Carminative
For digestive complaints, the herb is typically prepared as a tea or decoction taken before meals. The bitter compounds stimulate digestive secretions and improve nutrient absorption. Some traditions use the powdered root or leaves in small doses as a stomachic tonic.
Respiratory conditions.
- Cold
- Pneumonia
Respiratory conditions are addressed through steam inhalation of the herb’s vapors or internal use as a warm tea. The hot infusion acts as an expectorant, helping to loosen phlegm and clear congestion. Some traditions combine it with honey for coughs.
Pain and inflammation.
- Ache(Head)
For pain and inflammation, preparations are applied both topically as compresses and taken internally. A warm poultice draws blood to the area and promotes healing, while internal preparations address systemic inflammation.
Active Compounds
Phytochemical research has identified 30 compounds in this species, including a diverse array of phytochemical classes (see the Complete Chemical Inventory below for the full list).
The identified compounds include the following categories:
- Alkaloid: nitrogenous compounds with diverse pharmacological activities