One study in Colorado found that favored foods included vetch and evening primrose. GLA was first isolated from the seed oil of evening primrose. Licences for several evening primrose oil-containing drugs were later withdrawn. Evening primrose oil may be useful. However, almost all parts of the evening primrose are edible and medically or cosmetically applicable. Vitamin E is not effective in relieving pain nor is evening primrose oil. The flowers of many species open in the evening, hence the name "evening primrose". Common names include evening primrose, suncups, and sundrops. For American television, Perkins appeared in "Evening Primrose" (1966). One plant which grows right out of the sand is the beach evening primrose. Evening primrose is a soothing remedy for coughs associated with colds. For this reason evening primrose oil is a widely sold dietary supplement. Evening primrose oil (EPO) is produced from the plant. Endemic species include the Eureka Dune Grass, the Eureka Evening Primrose and the Shining Locoweed. The result was "Evening Primrose", with Anthony Perkins and Charmian Carr.