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, Triffid Weed
Plant FamilyAsteraceae
Natural HabitatNative to tropical and subtropical Americas, it has become a widespread invasive species in many parts of Asia and Africa, thriving in disturbed areas, roadsides, agricultural lands, and forest edges.
Parts Usedleaf,flower,whole_plant
Medicinal Actionsanti-inflammatory,antimicrobial,antioxidant,astringent
Traditional UsesTraditionally, the leaves are widely used for wound healing, to stop bleeding, and to treat skin infections. It is also employed internally for conditions such as malaria, fever, coughs, and various gastrointestinal complaints in traditional medicine systems.
Active ConstituentsFlavonoids, Alkaloids, Tannins, Essential oils
Preparation Methodsinfusion,decoction,poultice,powder
Contraindications & WarningsMay cause allergic reactions in sensitive individuals. Due to its potential toxicity in large doses, it should be used with caution and professional guidance. Not recommended for pregnant or breastfeeding women.
Cultivation NotesGenerally not cultivated due to its highly invasive nature. It grows vigorously from seeds or stem cuttings in warm, humid climates with ample sunlight and well-drained soil, often outcompeting native vegetation.
Raritycommon
Description
Chromolaena odorata is a fast-growing perennial shrub, typically reaching 1-3 meters in height. It features ovate to deltoid leaves with serrated margins and produces numerous small, white to pale lavender flowers in dense terminal corymbs.
