Nasa urens
NameNasa urens
Scientific NameNasa urens
Common NamesOrtiga Brava, Pega Pega, Stinging Loasa
Plant FamilyLoasaceae
Natural HabitatNative to the Andes region of South America, including Peru, Bolivia, Chile, and Argentina. It thrives in dry, rocky slopes, disturbed areas, roadsides, and agricultural fields.
Parts Usedwhole_plant,leaf
Medicinal Actionsanalgesic,anti-inflammatory,antimicrobial
Traditional UsesTraditionally, Nasa urens is used externally in Andean folk medicine to alleviate rheumatic pain, muscle aches, and sprains. The stinging hairs are sometimes intentionally applied to the skin to create a counter-irritant effect, believed to draw out pain or inflammation.
Active Constituentsflavonoids, alkaloids
Preparation Methodspoultice,decoction
Contraindications & WarningsAvoid contact with open wounds or sensitive skin due to severe irritation from stinging hairs. Not recommended for internal use without expert guidance. May cause allergic reactions in sensitive individuals.
Cultivation NotesPrefers full sun and well-drained, often dry or rocky soil. It is typically found in disturbed habitats and can be considered a weed in its native range. Propagation is usually by seed.
Raritycommon
Description
Nasa urens is an herbaceous plant characterized by its vibrant yellow, five-petaled flowers and stems covered in stinging hairs. The flowers feature a prominent white central structure of staminodes and stamens, often appearing solitary or in small clusters. This plant is well-known for the painful irritation caused by contact with its trichomes.
