Oenothera elata is a plant of the genus Oenothera known by the common name Hooker's evening primrose. Its subspecies include hookeri, hirsutissima and elata. It is native to much of western and central North America.
The hookeri subspecies of Oenothera elata, native to California, can reach about 1.8 meters (6 feet) height. The shade of its flowers varies from yellow to orange.