Loasa sigmoidea
NameLoasa sigmoidea
Scientific NameLoasa sigmoidea
Common NamesOrtiga de la sierra
Plant FamilyLoasaceae
Natural HabitatNative to arid and semi-arid regions of Chile and Peru, often found on rocky slopes, disturbed ground, or along roadsides.
Parts Usedwhole_plant,leaf
Medicinal Actionsanalgesic,anti-inflammatory
Traditional UsesTraditionally, some Loasa species, including Loasa sigmoidea, have been used externally as a counter-irritant for rheumatic pain, arthritis, and muscle aches. The stinging sensation is believed to stimulate blood flow and alleviate deeper pain.
Active Constituentshistamine, acetylcholine, serotonin, flavonoids
Preparation Methodspoultice,tincture
Contraindications & WarningsDirect contact with stinging hairs causes severe skin irritation, redness, swelling, and pain. Not for internal use. Avoid contact with eyes and mucous membranes. Allergic reactions are possible.
Cultivation NotesPrefers full sun and well-drained, sandy or rocky soil. Drought-tolerant once established. Handle with gloves due to stinging hairs.
Rarityuncommon
Description
Loasa sigmoidea is an annual or perennial herb characterized by its striking yellow, complex flowers with prominent stamens and often orange-red staminodes. The entire plant, especially stems and leaves, is covered in stinging hairs.
