Leonurus cardiaca

Leonurus cardiaca

Plant Family

Lamiaceae

Botanical Description

Motherwort is a perennial herb growing 60-120 cm tall with square stems, deeply lobed palmate leaves, and whorls of small pink to purple flowers on the upper stem. Has a bitter taste.

Cautions

Avoid during pregnancy (may stimulate uterus). Not for heavy menstrual bleeding. May interact with heart medications, sedatives, and thyroid medications. May cause photosensitivity.

Habitat

Waste ground, roadsides, hedgerows, near human habitation.

Harvest Instructions

Aerial parts harvested when flowering begins. Cut top third of plant.

Geographic Distribution

Native to Europe and Central Asia. Naturalized in North America.

Growth Conditions

Full sun to partial shade. Tolerates poor soil. Prefers well-drained conditions.

Plant Size

60-120 cm

Effects on the Body

Calms heart palpitations, reduces anxiety, supports heart function, eases menstrual difficulties. Traditional women's herb.

Active Constituents

Leonurine, stachydrine, flavonoids (rutin, quercetin), iridoids, diterpenes, tannins.

Safety Information

Dosage

Tea: 1-2 teaspoons dried herb in hot water, steep 10-15 minutes. Tincture: 2-4 ml three times daily.

Culinary Use

Not used culinarily due to bitter taste.

Folklore & Historical Use

Traditional women's herb for centuries. Latin name 'cardiaca' refers to heart use. Called 'lion's tail' due to leaf shape.

Scientific Research

European Medicines Agency approves for nervous cardiac complaints and hyperthyroid conditions. Limited but supportive clinical evidence for mild sedative and antiarrhythmic effects. German Commission E approves for nervous heart complaints.