Which plants upper petal is divided into two lobes, Ammobium or Westringia?
Ammobium Ammobium is genus of perennial Asteraceae species described as a genus in 1824.
Abronia ammophila Abronia ammophila, the Yellowstone sand verbena, or Wyoming sand verbena, is a plant unique to Yellowstone National Park lakeshores and is endemic to the park.