Siam Weed
Image: Thilanka and Nimali (cc-by-nc)
NameSiam Weed
Scientific NameChromolaena odorata
Common NamesSiam Weed, Bitter Bush, Christmas Bush, Jack-in-the-bush
Plant FamilyAsteraceae
Natural HabitatNative to Central and South America, but widely naturalized and invasive in tropical and subtropical regions worldwide, thriving in disturbed areas, forest margins, grasslands, and agricultural lands.
Parts Usedleaf,flower,whole_plant
Medicinal Actionsanti-inflammatory,antimicrobial,antioxidant,astringent,analgesic
Traditional UsesTraditionally used for wound healing, stopping bleeding, treating skin infections, burns, malaria, fever, and as an anti-inflammatory agent. Leaves are often crushed and applied topically.
Active ConstituentsFlavonoids, Terpenoids, Alkaloids, Essential oils
Preparation Methodsinfusion,poultice,decoction,powder,salve
Contraindications & WarningsMay cause allergic reactions in sensitive individuals. Internal use should be cautious due to potential toxicity in high doses or prolonged use. Not recommended for pregnant or breastfeeding women.
Cultivation NotesConsidered an invasive weed in many regions, it grows vigorously in full sun to partial shade and a wide range of soil types. It is easily propagated by seed or stem cuttings.
Raritycommon
Description
A fast-growing perennial shrub or herb, often scrambling or climbing, reaching up to 3 meters tall. It produces numerous small, white to pale lavender flowers in dense terminal clusters, characterized by their brush-like appearance.
