About Oenothera nuttallii Torr. & A.Gray
Oenothera nuttallii Torr. & A.Gray, commonly called the white-stemmed evening-primrose, is a species of flowering plant belonging to the evening primrose family. It is native to western Canada, excluding British Columbia, and the north-central United States, and has been introduced to Illinois. This perennial plant grows up to 60 cm (24 in) tall. It occurs in grasslands, sagebrush steppes, and plains, and typically grows in sandy soils.