Lily of the valley (Convallaria majalis) is a highly fragrant, herbaceous perennial known for its distinctive white, bell-shaped flowers that bloom in the spring. While valued as an ornamental plant and a classic component in perfumery, it contains potent cardiac glycosides, making all parts of the plant highly poisonous if ingested.
Botanical and INCI Classification
- Scientific Name:Convallaria majalis L..
- Family:Asparagaceae (formerly Liliaceae or Convallariaceae).
- INCI Classification:(External Information) In the International Nomenclature of Cosmetic Ingredients, extracts from this plant are typically listed as Convallaria Majalis Flower Extract or Convallaria Majalis Extract.
What is Lily of the Valley?
Lily of the valley is a woodland flowering plant native to Europe and parts of Asia and North America. It typically grows 15–35 cm tall and forms extensive colonies through spreading underground stems called rhizomes.
- Flowers:Sprays of 6 to 12 pendulous, sweetly scented white flowers.
- Foliage:Usually two broad, elliptic leaves.
- Fruit:Small, poisonous orange-red berries that develop in the summer.
Parts of the Plant Used
Depending on the application (herbal medicine, perfumery, or traditional use), various parts of the plant are utilized:
- Flowers:Primarily for fragrances, essential oils, and traditional tinctures.
- Leaves:Used in dried forms for herbal preparations and external poultices.
- Rhizomes/Bulbs:Historically used as a cardiotonic to regulate heart action.
- Aerial Parts:Often harvested together for practitioner-only medicinal extracts.
Benefits and Uses
- Medicinal (Practitioner-Only)
Because of its narrow therapeutic window, medicinal use is generally restricted to qualified professionals.
- Cardiotonic:It strengthens and tones the cardiac muscle, improving the efficiency of the heart’s pumping action without increasing oxygen demand.
- Heart Conditions:Used to treat mild-to-moderate congestive heart failure, cardiac arrhythmias (like atrial fibrillation), and heart palpitations.
- Diuretic:Helps reduce oedema (fluid build-up) of cardiac origin by increasing blood flow to the kidneys and limiting sodium reabsorption.
- Fragrance and Cosmetics
- Perfumes:Its complex “muguet” scent is a staple in perfumery, famously featured in Dior’s Diorissimo. Because a natural extract is difficult to produce, the scent is often recreated synthetically.
- Aromatherapy:Used traditionally to help ease headaches, depression, and melancholy.
- Traditional and Folk Uses
- External Applications:Historically used in poultices to draw out splinters or pus from wounds.
- Memory and Brain Health:Older traditions suggested its use to “strengthen the brain” and improve weak memory.
Potential Side Effects and Toxicity
All parts of the plant are toxic due to the presence of roughly 38 different cardiac glycosides.
- Symptoms of Ingestion:Nausea, vomiting, abdominal pain, diarrhoea, and a slow or irregular pulse.
- Severe Toxicity:Can lead to cardiac arrhythmias, mental confusion, circulatory collapse, and potentially death in cases of extreme overdose.
- Drug Interactions:Must not be taken with other cardiac glycosides (like digoxin), beta-blockers, or potassium-depleting drugs (corticosteroids, certain diuretics).
- Contraindications:Should be avoided during pregnancy, breastfeeding, and in individuals with high blood pressure or potassium deficiency.