Guaraní cestrum
NameGuaraní cestrum
Scientific NameCestrum parqui
Common NamesGuaraní cestrum, Green Cestrum, Palqui, Willow-leaved Jessamine, Chilean Cestrum
Plant FamilySolanaceae
Natural HabitatNative to South America, particularly Chile, Argentina, Uruguay, and Paraguay. It thrives in disturbed areas, roadsides, forest edges, and riparian zones, preferring full sun to partial shade and well-drained soils.
Parts Usedleaf,flower,bark
Medicinal Actionsanalgesic,anti-inflammatory,diuretic
Traditional UsesTraditionally, the leaves and bark of Guaraní cestrum have been used in South American folk medicine as a febrifuge to reduce fever, as an analgesic for pain relief, and as an anti-inflammatory agent. It was also sometimes used as a diuretic, though its high toxicity necessitates extreme caution.
Active ConstituentsGlycoalkaloids (e.g., parquin, cestrine), saponins, flavonoids
Preparation Methodsinfusion,decoction,poultice
Contraindications & WarningsALL parts of Cestrum parqui are highly toxic, especially the berries and leaves, due to the presence of glycoalkaloids. Ingestion can cause severe gastrointestinal upset, neurological symptoms (tremors, convulsions), respiratory distress, and liver damage, potentially leading to death. It is toxic to humans and livestock. This plant should not be used internally or externally without expert supervision, and is generally avoided due to its high toxicity. Pregnant and breastfeeding women, children, and individuals with liver or kidney conditions should absolutely avoid it.
Cultivation NotesThis plant is relatively easy to grow in warm climates (USDA zones 8-11). It prefers full sun to partial shade and well-drained soil, and is drought-tolerant once established. It can tolerate a range of soil types but can become invasive in some regions.
Raritycommon
Description
Cestrum parqui is a fast-growing, semi-deciduous shrub or small tree, typically reaching 2-4 meters in height. It features slender, lanceolate leaves and clusters of fragrant, tubular, greenish-yellow flowers that open at night, followed by small, dark purple berries.
