The Heath Family Members are two flowering plants, Azaleas and Ericas. Azaleas are a genus of flowering shrubs in the heath family, Ericaceae, that range in size from small bushes to larger trees. Ericas are a genus of flowering plants in the heath family, Ericaceae, that are mostly low-growing shrubs. Both genera have numerous species and cultivars that are widely cultivated for their attractive flowers and foliage.