An infusion of the leaves and stems is used as a wash for acne, skin ulcers, poor skin, bruises, and infections (Cabrera n.d.; Linares, Penafiel, and Bye 1988; Martinez 1969).

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Origin:
Mexico
Medicinal  properties:
- Bruises, contusions (topically)
- Tea as gargles for sore throat
Toxicity:
- Potentially toxic, avoid internal use
- Avoid in pregnancy and lactation
- Not to be confused with European arnica, with which it shares some of its applications

1) Nicholson Michael S. ; Arzhennithe, Charles . Economic Botany. vol. 47 . --p. 184-192 1993

2) Armando González Stuart/ Plants Used in Mexican Plants Used in Mexican Traditional Medicine Traditional Medicine: Their Application and Effects In Traditional Healing Practices. - p. 28.