Botanical Name: Oenothera biennis. Other Common Names: Fever plant, great evening-primrose, kings-cure-all, night willow-herb, scabish, scurvish, tee primrose, sun drop, suncups. Habitat: Evening primrose grows in the temperate climates of North America, and other similar regions. This plant can be found growing in the dry, open soils along roadways, railways, and in open fields. This plant prefers full sun, although the flowers only bloom at night or on overcast days. This plant lasts two years and is self-sowing. Plant Description: Evening primrose is a tall (3-6 feet in height), biennial plant native to North America, with a base of leaves