Oenothera versicolor, the red evening-primrose, is a species of flowering plant in the family Onagraceae, native to South America, from Peru and Ecuador down to Bolivia and Northern Argentina[2] This species is not as common in cultivation as other members of the genus but popular cultivars including 'Sunset Boulevard' are grown in gardens around the temperate world as the plant is hardy down to at least −10 °C (14 °F).

Oenothera versicolor is a bushy perennial growing to 1 m (3 ft 3 in) tall.

The plant is erect and forms a basal rosette of leaves which are narrowly lanceolate and gradually narrow to the petiole.

The leaf margins are reddish, especially in the bracts of the young buds, and the inflorescence is mostly unbranched.

The seeds of the Red Evening-primrose form in capsules which are generally around 1.5-3 cm long, 5-9 mm thick and dark in colour when ripe.