Siam Weed
Image: Thilanka and Nimali (cc-by-nc)
NameSiam Weed
Scientific NameChromolaena odorata
Common NamesSiam Weed, Bitter Bush, Christmas Bush, Common Floss Flower, Triffid Weed, Jack-in-the-Box
Plant FamilyAsteraceae
Natural HabitatNative to Central and South America, now widely naturalized and invasive in tropical and subtropical regions worldwide, found in disturbed areas, roadsides, agricultural lands, and forest edges.
Parts Usedleaf,flower,whole_plant
Medicinal Actionsanalgesic,anti-inflammatory,antimicrobial,antioxidant,astringent
Traditional UsesTraditionally used for wound healing, stopping bleeding, treating skin infections, malaria, fever, and coughs. Leaves are often crushed and applied topically to cuts and wounds for their antiseptic and hemostatic properties.
Active ConstituentsFlavonoids, Alkaloids, Essential oils, Tannins, Saponins
Preparation Methodsinfusion,decoction,poultice,powder
Contraindications & WarningsMay cause allergic reactions in sensitive individuals. Internal use should be approached with caution 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, so cultivation is generally discouraged. It thrives in full sun to partial shade and a wide range of soil types, preferring moist, well-drained conditions.
Raritycommon
Description
A fast-growing perennial shrub or herb, often forming dense thickets. It has slender, branched stems and ovate to deltoid leaves, bearing distinctive white to pale lavender flowers in dense terminal corymbs.
