Siam Weed
Image: Thilanka and Nimali (cc-by-nc)
NameSiam Weed
Scientific NameChromolaena odorata
Common NamesSiam Weed, Christmas Bush, Common Floss Flower, Bitter Bush
Plant FamilyAsteraceae
Natural HabitatNative to Central and South America, it has become a pantropical invasive weed, thriving in disturbed areas, roadsides, agricultural lands, and forest edges in tropical and subtropical climates.
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 gastrointestinal issues. The leaves are often crushed and applied topically to cuts and sores.
Active ConstituentsFlavonoids, Alkaloids, Essential oils, Tannins, Saponins
Preparation Methodsinfusion,decoction,poultice,powder
Contraindications & WarningsCan be toxic to livestock if consumed in large quantities. Some individuals may experience allergic reactions upon skin contact. Internal use should be approached with caution due to potential hepatotoxicity in high doses or prolonged use.
Cultivation NotesConsidered an invasive weed in many regions, it grows vigorously in full sun to partial shade and a wide range of soil types, preferring moist, well-drained conditions. It reproduces readily by seed and vegetatively.
Raritycommon
Description
A fast-growing, perennial, herbaceous shrub or subshrub, often forming dense thickets. It features opposite, ovate to deltoid leaves and produces numerous small, white to pale lavender flowers in terminal corymbs.
