Siam Weed
Image: Thilanka and Nimali (cc-by-nc)
NameSiam Weed
Scientific NameChromolaena odorata
Common NamesSiam Weed, Common Floss Flower, Bitter Bush, Christmas Bush
Plant FamilyAsteraceae
Natural HabitatNative to Central and South America, this plant thrives in disturbed areas, roadsides, agricultural lands, and forest edges in tropical and subtropical regions worldwide, where it is often considered an invasive species.
Parts Usedleaf,whole_plant
Medicinal Actionsanti-inflammatory,antimicrobial,antioxidant,astringent
Traditional UsesTraditionally, Siam Weed leaves are widely used for wound healing, to stop bleeding, and to treat various skin infections. It has also been employed in some traditional medicine systems for conditions such as malaria, fever, and certain gastrointestinal issues.
Active Constituentsflavonoids, alkaloids, tannins, essential_oil
Preparation Methodsinfusion,decoction,poultice
Contraindications & WarningsMay cause allergic reactions in sensitive individuals. Internal use should be approached with caution due to potential hepatotoxicity with prolonged high doses. It is generally not recommended for pregnant or breastfeeding women.
Cultivation NotesConsidered an invasive weed in many tropical and subtropical regions, its cultivation is generally not encouraged. It grows readily from seeds or cuttings in warm, humid climates with full sun to partial shade, often outcompeting native vegetation.
Raritycommon
Description
A fast-growing, perennial shrub often found scrambling or climbing, characterized by hairy stems and opposite ovate leaves. It produces dense clusters of small, white to pale lavender, fluffy composite flowers.
