Gently boil a few pieces of dried root in water for about ten minutes, then let steep off the heat before straining. This preparation was used with moderation according to reported traditional practices. Dosage should be validated with a healthcare professional or recognized pharmacopoeia before use.
Soak a clean cloth in cooled root decoction and apply locally to the affected area. Renew the application if necessary, without prolonged use. Dosage should be validated with a healthcare professional or recognized pharmacopoeia before use.
This plant grows wild in the mountainous regions of western North America; it is rarely available in French herbalist shops and is mainly found through specialists in North American plants or in botanical garden cultivation.
The root is traditionally harvested in autumn, once the aerial parts have withered, a period when the plant's reserves are concentrated there.