Siam Weed
Image: Thilanka and Nimali (cc-by-nc)
NameSiam Weed
Scientific NameChromolaena odorata
Common NamesSiam Weed, Christmas Bush, Common Floss Flower, Triffid Weed
Plant FamilyAsteraceae
Natural HabitatNative to Central and South America, it is now a widespread invasive weed in tropical and subtropical regions globally, thriving in disturbed areas, roadsides, agricultural lands, and forest edges.
Parts Usedleaf,flower,whole_plant
Medicinal Actionsanti-inflammatory,antimicrobial,antioxidant,astringent
Traditional UsesTraditionally used for wound healing, stopping bleeding, and treating skin infections due to its antimicrobial and astringent properties. It is also employed in some traditional systems for malaria, fever, and coughs, with crushed leaves often applied topically to cuts and wounds.
Active ConstituentsFlavonoids, Alkaloids, Essential oils, Tannins, Saponins
Preparation Methodsinfusion,poultice,decoction,powder
Contraindications & WarningsMay cause allergic reactions in sensitive individuals. Internal use should be approached with caution due to potential toxicity in large doses or prolonged use. Not recommended for pregnant or breastfeeding women.
Cultivation NotesConsidered an invasive weed in many parts of the world, it grows rapidly in full sun to partial shade. It tolerates various soil types and propagates easily by seed or stem cuttings, requiring no specific cultivation as it thrives aggressively.
Raritycommon
Description
A fast-growing perennial shrub, often forming dense thickets, characterized by its ovate, serrated leaves. It produces terminal clusters of small, white to pale lavender, fluffy flowers.
