Camissonia contorta (Douglas ex Lehm.) Kearney

Camissonia contorta (Douglas ex Lehm.) Kearney. Camissonia contorta is a species of flowering plant, known by the common name plains evening primrose, in the family Onagraceae. It is an annual herb producing a slender, bending to curling red or green stem which is sometimes hairy. It is up to 30 centimeters long and erect or spreading out. The blue-green leaves are linear to very narrowly oval in shape and up to 3.5 centimeters long. The nodding inflorescence produces one or more small flowers. Each has bright yellow petals up to half a centimeter long, sometimes with small red dots near the bases. The fruit is a capsule about 3 centimeters long, containing 50 -100 tiny seeds.