Oenothera biennis

Oenothera biennis
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Onagraceae
Genus: Oenothera
Species:
O. biennis
Binomial name
Oenothera biennis
Synonyms
  • Brunyera biennis (L.) Bubani
  • Oenothera biennis var. vulgaris Torr. & A.Gray
  • Onagra biennis (L.) Scop.
  • Pseudo-oenothera virginiana Rupr.

Oenothera biennis, the common evening-primrose, is a species of flowering plant in the family Onagraceae, native to eastern and central North America, from Newfoundland west to Alberta, southeast to Florida, and southwest to Texas, and widely naturalized elsewhere in temperate and subtropical regions. Evening primrose oil is produced from the plant.

Other common names include evening star, sundrop, weedy evening primrose, German rampion, hog weed, King's cure-all and fever-plant.