Desertbroom

Aka broom baccharis, greasewood, rosin-bush and groundsel in English and "escoba amarga" or "romerillo" in Spanish.
"The Seri refer to desert broom as cascol caaco, and make a decoction by cooking the twigs. This tea is used to treat colds, sinus headache, and general sore achey ailments. The same tea is also be used as a rub for sore muscles. Studies done on plant extracts show that desert broom is rich in leutolin, a flavonoid that has demonstrated anti-inflammatory, antioxidant, and cholesterol lowering capabilities. Desert broom also has quercetin, a proven antioxidant, and apigenin a chemical which binds to the same brain receptor sites that Valium does."