Pennyroyal (Mentha pulegium)
Parts used: aerial parts
Medicinal uses: A good digestive tonic, it stimulates digestive juices, relieves flatulence and colic; a good remedy for headaches and for minor respiratory infections helping to keep fever and congestion in check; a powerful stimulant to the uterine muscle encouraging menstruation; externally it can be sued to relieve itchiness and rheumatic conditions including gout (Chevallier 234).
Additional uses: This plant is well regarded as an insect repellent, for both humans and pets (Kowalchik 413)
Cautions: Do not take during pregnancy or if menstrual bleeding is heavy (Chevallier 234).
Pacific Northwest Medicinal Plant Guide (Check out all plants growing in Tryon Farm's medicinal garden!)