Motherwort

(Leonurus cardiaca)

Basic Identification

Common Names

Motherwort
Lion’s tail
Throw-wort
Heartwort

Botanical Name

Leonurus cardiaca

Plant Family

Lamiaceae (Mint family)

Parts Used

• Aerial parts (leaves, stems, and flowers) — primary medicinal use

Habitat and Native Range

Motherwort is native to Europe and Central Asia but is now widely naturalized throughout North America and other temperate regions.

It commonly grows in:
• disturbed soils
• roadsides
• waste areas
• garden edges
• urban environments

Motherwort prefers:
• full sun to partial shade
• well-drained soil
• moderate moisture

It is a hardy perennial that often establishes itself easily and can spread in favorable conditions.

Motherwort is occasionally cultivated in herbal gardens but is more often wild-harvested due to its abundance and resilience.

Overview

Motherwort is a deeply valued herb in Western herbalism, particularly known for its strong relationship with the heart—both physical and emotional. It is most commonly used to calm the nervous system, regulate heart rhythm, and support individuals experiencing stress, anxiety, or emotional overwhelm.

Unlike gentler relaxing herbs, motherwort has a more direct and noticeable effect, especially in cases where stress manifests as heart palpitations, tension in the chest, or emotional intensity.

It is especially valuable in conditions where the nervous system and cardiovascular system are closely linked, helping to steady both the emotional and physical heart.

Motherwort is considered a key herb in both traditional and clinical practice for addressing acute stress responses, particularly when symptoms feel immediate or intense.

Basic Uses

Motherwort is commonly used for:

• Heart palpitations (especially stress-related)
• Anxiety with physical symptoms in the chest
• Nervous tension and emotional overwhelm
• Mild hypertension associated with stress
• Menstrual discomfort and hormonal tension
• Support during menopause (especially with anxiety or palpitations)

Botanical Description / Morphology

Growth Habit
Upright perennial herb, typically 2–5 feet tall, with a square stem and somewhat coarse, bushy appearance

Stem
• Square (typical of mint family)
• Green to slightly purplish
• Ridged and somewhat hairy
• Strong, upright structure

Leaves
• Arrangement: Opposite
• Shape: Deeply lobed, palmate (especially lower leaves)
• Upper leaves: More narrow and less divided
• Margin: Coarsely toothed
• Surface: Slightly rough, often hairy

Venation
• Prominent midrib with branching lateral veins
• Clearly visible due to broader leaf structure

Flowers
• Type: Small, tubular flowers arranged in whorls (verticillasters) around the stem
• Color: Pale pink to lavender
• Shape: Two-lipped (typical of mint family)
• Location: Clustered at leaf nodes along upper stem

Key Feature
• Distinctive whorled flower clusters encircling the stem at intervals
• Combined with square stem and lobed leaves, this makes identification relatively easy

Roots
• Fibrous root system
• Perennial rootstock that returns each year

Key Identifying Features

• Square stem (mint family)
• Deeply lobed, somewhat coarse leaves
• Whorled clusters of small pink/purple flowers along the stem
• Strong, somewhat bitter aroma when crushed

Similar Species / Lookalikes

• Other Leonurus species – generally similar, but less commonly encountered
• Mint family plants (general) – share square stems but differ in leaf shape and flower arrangement
• Dead nettle (Lamium spp.) – similar flower structure but different growth habit and leaf shape

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