Siam Weed
Image: Thilanka and Nimali (cc-by-nc)
NameSiam Weed
Scientific NameChromolaena odorata
Common NamesSiam Weed, Christmas Bush, Common Floss Flower, Triffid Weed
Plant FamilyAsteraceae
Natural HabitatNative to Central and South America, it is now a pantropical invasive weed, thriving in disturbed areas, roadsides, forest edges, and agricultural lands in tropical and subtropical climates.
Parts Usedleaf,flower,whole_plant
Medicinal Actionsanti-inflammatory,antimicrobial,antioxidant,astringent
Traditional UsesTraditionally used for wound healing, cuts, burns, and skin infections due to its antimicrobial and anti-inflammatory properties. In some regions, it is also employed for fever, coughs, and gastrointestinal complaints.
Active ConstituentsFlavonoids, Alkaloids, Essential oils, Tannins, Saponins
Preparation Methodspoultice,infusion,decoction,tincture
Contraindications & WarningsMay cause allergic reactions in sensitive individuals. Internal use should be approached with caution due to potential toxicity in high doses or long-term use, and a lack of extensive human safety data.
Cultivation NotesConsidered an invasive weed in many tropical and subtropical regions, it grows vigorously in full sun to partial shade, tolerating a wide range of soil types. It spreads rapidly by seed and vegetative means, making cultivation for medicinal purposes generally unnecessary and often discouraged due to its invasive nature.
Raritycommon
Description
A fast-growing, perennial shrub or herbaceous plant, often forming dense thickets. It features clusters of small, white to pale lavender, fluffy flowers and ovate, serrated green leaves arranged oppositely on its stems.
