Oenothera lavandulifolia, commonly called lavender leaf sundrops, is a low-growing perennial plant in the evening primrose family found in the Colorado Plateau and Canyonlands region of the southwestern United States.
From May to July it blooms with striking yellow flowers that fade to shades of orange or lavender as the flower dries up.
Oenothera lavandulifolia was scientifically described and named by John Torrey and Asa Gray in 1840. It is part of the genus Oenothera in the family Onagraceae. It has no accepted subspecies or varieties, but it has synonyms. It has, at times, been considered a variety or subspecies of Oenothera hartwegii.
It grows in blackbrush scrub and mixed desert shrub up into pinyon juniper woodland and ponderosa pine forest communities, as far north as South Dakota, and up to in elevation in the southwest.