Ericameria nauseosa (formerly Chrysothamnus nauseosus), commonly known as Chamisa, rubber rabbitbrush, and gray rabbitbrush, is a North American shrub in the sunflower family (Aster). It grows in the arid regions of western Canada, western United States (from the western Great Plains to the Pacific) and northern Mexico. Two subspecies have been described, nauseosa (the gray form with 14 varieties) and consimilis (the green form with 8 varieties).