Onagraceae, commonly known as the evening primrose family, is a group of flowering plants primarily found in temperate and tropical regions. This family includes about 20 genera and over 600 species, with notable members like Oenothera (evening primrose) and Ludwigia (water primrose). They are characterized by their four-petaled flowers, which can be yellow, white, or pink, and often bloom in the evening or at night. Many species in the Onagraceae family are known for their medicinal properties and are used in herbal remedies. The plants typically thrive in a variety of habitats, including wetlands and disturbed areas, and can be annual or perennial. Their unique reproductive strategies often attract a range of pollinators, contributing to their ecological importance.