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.

Native to the Sonoran Desert of northwestern Mexico (Baja California, Baja California Sur, Sinaloa, Sonora) and the Southwestern United States (southern California, Arizona, New Mexico, western Texas), it is common in gravelly dry soils and disturbed areas.

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