Ericameria winwardii is a rare North American species of flowering plants in the daisy family. It has been found only on in two adjacent counties in the western United States: Lincoln County in Wyoming and Bear Lake County in Idaho. Ericameria winwardii is a branching shrub up to 20 cm (8 inches) tall. Leaves are elliptic or oblanceolate up to 15 mm (0.6 inches) long. It sometimes produces flower heads one at a time, sometimes in groups, each head with 4–9 disc florets but no ray florets.