Canadian Fleabane (Conyza canadensis syn. Erigeron canadensis)

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Botanical Information

• Family: Asteraceae
• Common Names: Canadian Fleabane, Horseweed, Butterweed
• Parts Used: Aerial parts (leaves, stems, flowers)

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Description

Conyza canadensis is an annual herb native to North America, now widespread across temperate and tropical regions. It has a long history of use in Indigenous and Western herbal medicine, particularly for its astringent, anti-inflammatory, and diuretic properties. Traditionally, it has been employed to treat wounds, digestive issues, urinary tract conditions, and excessive bleeding.

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Historical and Traditional Uses

• Used by Indigenous peoples of North America for urinary tract infections, bleeding disorders, and respiratory conditions.
• Employed as a diuretic and astringent in early American herbal medicine.
• Traditionally burned as an insect repellent due to its aromatic properties.

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Constituents

• Essential oils (limonene, terpenes)
• Flavonoids
• Tannins
• Resins
• Alkaloids

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Actions

• Astringent
• Anti-inflammatory
• Diuretic
• Hemostatic (reduces bleeding)
• Antimicrobial
• Carminative (supports digestion)

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Medicinal Uses

1. Urinary Tract and Kidney Support:
Canadian Fleabane has been traditionally used as a diuretic to promote kidney health and relieve urinary tract infections.

2. Hemostatic and Wound Healing:
Astringent properties help control excessive bleeding and aid in wound healing when applied topically.

3. Digestive Aid:
Used to relieve indigestion, bloating, and excess gas by calming the digestive tract.

4. Anti-Inflammatory and Pain Relief:
Traditionally used to alleviate joint pain, rheumatism, and inflammatory conditions.

5. Respiratory and Cold Support:
Employed as a mild expectorant to clear mucus and soothe coughs.

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Preparation and Dosage

Infusion (Tea):

• 1-2 tsp of dried herb per cup of boiling water. Steep for 10-15 minutes and drink up to 2 times daily.

Tincture:

• 2-5 ml of tincture taken up to 3 times daily.

Poultice or Compress:

• Applied externally to wounds and inflamed areas for soothing effects.

Inhalation:

• Dried leaves and flowers burned to clear respiratory passages and repel insects.

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Precautions and Contraindications

• Pregnancy and Lactation: Use with caution and consult a healthcare provider before use.
• Blood Disorders: Due to its hemostatic properties, individuals on blood thinners should use with caution.
• Allergic Reactions: May cause reactions in individuals sensitive to plants in the Asteraceae family.

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Energetics (Traditional Medicine Perspectives)

• Traditional Western Herbalism: Cooling and drying; supports digestion, circulation, and inflammation reduction.
• Indigenous North American Medicine: Used for cleansing, purification, and healing wounds.

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Combinations

• For Urinary Health: Combine with uva ursi and corn silk.
• For Wound Healing: Combine with yarrow and plantain.
• For Digestive Support: Combine with peppermint and ginger.

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Harvesting and Storage

• Harvesting: Aerial parts are collected in mid to late summer when in bloom.
• Drying: Air dry in a shaded, well-ventilated area.
• Storage: Store dried material in an airtight container away from moisture and light.

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Modern Research

Studies confirm Conyza canadensis’s diuretic, antimicrobial, and anti-inflammatory properties, reinforcing its traditional medicinal applications.

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Canadian Fleabane remains a versatile herb in traditional and modern medicine, valued for its urinary, digestive, and wound-healing benefits.