In the understory of North America, Eurybia macrophylla, the large-leaved aster, was known to certain Indigenous peoples for the virtues attributed to its root. Less celebrated than other plants of the traditional pharmacopoeia, it nonetheless holds a discreet place in regional herbalists' notebooks, passed down through generations within forest communities.
The root was traditionally used by certain North American Indigenous groups to relieve ailments of the respiratory tract, notably as an inhaled preparation or drunk as a light decoction.
A traditional use of the root by fumigation or decoction to soothe headaches is reported, a practice documented in certain Indigenous oral traditions.
Preparations from crushed or infused root are said to have been applied locally to soothe certain skin irritations, according to loosely formalized traditional uses.
The root is also found, more marginally, among the plants used in decoction to accompany mild digestive troubles in certain local traditional practices.
A traditional use poorly documented scientifically: caution is warranted, particularly for internal preparations. Avoid any use in pregnant or breastfeeding women, for lack of sufficient safety data. Do not give to children without the advice of a health professional. Consult a qualified professional before any prolonged use or therapeutic application.
Partner herbalists — available with the detailed notebook.
PFAF, Wikipedia