Use: Meadow arnica, Arnica chamissonis, is very similar in active ingredients to Arnica montana and can be used the same medicinally. The flowers are used in an alcohol extract known as spirits of arnica. The extract is used externally for treating bruises, strains, swellings, sore muscles and joints, and rheumatism. Arnica is also effective in oils and liniments for many sports injuries. To make a liniment, heat 1 oz. arnica flowers in 1 oz. oil or lard for several hours. Strain and let the ointment cool before applying it to bruises or sore muscles. Arnica should not be used for open wounds. Caution: Arnica can be toxic when taken internally. Consumption can cause serious damage to the heart. keep arnica flowers and products out of reach of kids and pets. Culture: Meadow arnica likes regular water during the growing season, but may not tolerate excess water during winter. Meadow arnica grows slowly the first year, but once established it is quite hardy.