Silene perlmanii
 Silene perlmanii is a rare species of flowering plant in the pink family known by the common name cliff-face catchfly. It is endemic to Hawaii where it is known only from the southern Waianae Mountains of Oahu. Today there are no plants left in the wild. The species is in cultivation at the National Tropical Botanical Garden. It is a federally listed endangered species of the United States.This white-flowered subshrub was first discovered in 1987.