This is the very rare Eureka Dunes evening primrose, Oenothera californica ssp. eurekensis, that is only known from three locations in the southern Eureka Valley, which is part of Death Valley National Park. Eureka Dunes is the 2nd highest sand dune system in the United States at about 700' tall. This evening primrose grows on the lower slopes of the sand dunes and blooms from April to June with large showy white flowers that age to red. These pictures were taken in 2005 (our last good rainfall year) on a field trip with the Jepson Herbarium.