The root has been eaten as food and the plant also has a lot to offer as a medicinal. There is value from the root to the leaves to the flowers and then seeds.https://en.wikipedia.org/wiki/Oenothera_californicahttp://www.naturalmedicinalherbs.net/herbs/o/oenothera-biennis=evening-primrose.phpOenothera californica is a perennial herb producing a spreading or upright stem up to 80 centimetres (31 in) long. Young plants have a basal rosette of leaves, while older ones have leaves along the stem, lance-shaped to nearly oval in shape and up to 6 centimeters long.
Flowers occur in the upper leaf axils, drooping in bud and becoming erect as they bloom. The four petals are white, fading pink, and may exceed 3 centimeters long.