Oenothera biennis (Evening Primrose)

Oenothera biennis, also known as Evening Primrose, is a herbaceous plant that belongs to the Onagraceae family. It is native to North America and is characterized by its yellow flowers that bloom in the evening, hence the common name. The plant has a biennial lifecycle, with the first year producing a basal rosette of leaves and the second year producing a tall stem with flowers. Evening Primrose is widely used in herbal medicine for its oil that is rich in gamma-linolenic acid (GLA).