Loasa rotundifolia
NameLoasa rotundifolia
Scientific NameLoasa rotundifolia
Common NamesOrtiga brava, Loasa de hoja redonda
Plant FamilyLoasaceae
Natural HabitatNative to arid and semi-arid regions of Chile, often found on rocky slopes, roadsides, and disturbed areas.
Parts Usedleaf,flower,whole_plant
Medicinal Actionsanalgesic,anti-inflammatory
Traditional UsesIn traditional Chilean folk medicine, some *Loasa* species, including *L. rotundifolia*, have been used externally as a counter-irritant for rheumatic pain, localized inflammation, and muscle aches. It is typically applied as a poultice, utilizing its stinging properties to stimulate local circulation and distract from deeper pain.
Active ConstituentsFlavonoids, Triterpenes, Irritant compounds (in stinging hairs)
Preparation Methodspoultice,powder
Contraindications & WarningsSevere skin irritation and blistering upon contact due to stinging hairs. Avoid contact with eyes and mucous membranes. Not recommended for internal consumption due to potential toxicity and severe gastrointestinal irritation. Allergic reactions are possible.
Cultivation NotesPrefers full sun and well-drained, sandy or rocky soils. Drought-tolerant once established. Can self-seed readily and may be considered a weed in some agricultural or garden settings. Handle with extreme caution due to stinging hairs.
Raritycommon
Description
An annual or perennial herbaceous plant native to Chile, characterized by its roundish, deeply lobed leaves and stems covered in prominent stinging hairs. It produces distinctive yellow flowers with a complex, often reddish or whitish central structure of staminodes.
