Eastwoodia is a North American genus of plants in the sunflower family. It contains the single species Eastwoodia elegans, a flower known by the common name yellow mock aster or yellow aster. It is endemic to California. This plant is found only on the grasslands and hillsides of central California, from the Bay Area south to the Tehachapis. The genus was named for the Canadian-American botanist Alice Eastwood, 1859–1953.