View photos of the medicinal plant Grindelia squarrosa (Gumweed), profiled in Medicinal Plants of the Western Mountain States.

A passage from Medicinal Plants of the Western Mountain States:

Long recognized as a lung medicine, Grindelia is useful for a number of chronic to subacute conditions. Indications for the plant are bronchitis with a sense of airway constriction, raw and irritated pectoral membranes, and dry cough.