description Evening Primrose Overview
Evening primrose is the common name for plants in the genus Oenothera, a group of annual, biennial, and perennial herbs native mainly to the Americas. Many species bear four-petaled yellow flowers that open in the evening or at dusk, although flowering behavior varies across the genus. Oenothera is grown as a garden plant and wildflower, and its seeds are processed into evening primrose oil used in some dietary supplements.
help Evening Primrose FAQ
What is evening primrose?
Evening primrose is the common name for plants in the genus Oenothera. The genus includes annual, biennial, and perennial herbs native mainly to the Americas.
Why is it called evening primrose?
Many Oenothera species produce yellow, four-petaled flowers that open at dusk or in the evening. Flowering behavior varies across the genus, so not every species follows the same schedule.
Are evening primrose flowers always yellow?
Yellow is the best-known color, especially in species with evening-opening flowers, but Oenothera species can vary in flower color and behavior. Identification should be based on the whole plant, not color alone.
Is evening primrose related to true primroses?
No. Oenothera belongs to the evening primrose family, Onagraceae, while true primroses belong to the genus Primula. The shared common name does not mean they are closely related.
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