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, now widespread as an invasive species in tropical and subtropical regions worldwide, found 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, treating skin infections, malaria, fever, coughs, and as an anti-inflammatory. Leaves are often crushed and applied topically to cuts and wounds.
Active ConstituentsFlavonoids, Alkaloids, Tannins, Essential oils
Preparation Methodspoultice,infusion,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 NotesThrives in warm, humid climates with full sun to partial shade. Tolerant of various soil types but prefers well-drained soil. Can be highly invasive, so cultivation should be managed carefully to prevent spread.
Raritycommon
Description
A fast-growing perennial shrub or herb, often forming dense thickets. It features opposite, ovate to triangular leaves and produces numerous small, white to pale lavender, fluffy flower heads in terminal clusters.
