Rabbitbrush  Rabbitbrush is a common name for shrubs, principally of the western United States, in three related genera of the family Asteraceae:   Taxonomy for these genera has changed recently; previously, the rabbitbrushes in "Ericameria" and "Lorandersonia" were included in "Chrysothamnus". In each of these genera, not all species are called "rabbitbrush"; most "Ericameria", for instance, are called "goldenbush", and only a minority are called "rabbitbrush".