Baccharis sarothroides is a North American species of flowering shrub known by the common names broom baccharis, desertbroom, greasewood, rosin-bush and groundsel in English and "escoba amarga" or "romerillo" in Spanish. This is a spreading, woody shrub usually sticky with glandular secretions along the primarily leafless green stems. The small, thick leaves are a few centimeters long and are absent much of the year, giving the shrub a spindly, twiggy appearance. It flowers abundantly with tiny green blooms on separate male and female plants.