Above: Evening Primrose along shore of the Marion Dunn Pond in Madison, Wisconsin. (10/8/20).
Evening Primrose - Oenothera biennis
Evening Primrose is biennial plant that takes two years to complete its biological life cycle. It is a native plant that grows in prairies and disturbed sites. Evening Primrose grows from 2' to 6' in height.
Evening Primrose has 4-petal, yellow flowers. The flowers are hermaphrodite (bisexual), produced on a tall spike and only last until the following noon. They open visibly fast every evening, hence the name "evening primrose".
Evening Primrose blooms from late July to October.
Above: Evening Primrose in Oak Savanna in Madison, Wisconsin. (7/23/19).
For more information on the Evening Primrose, visit Wikipedia.
Or, visit the UW-Madison Wisconsin State Herbarium website page about Evening Primrose - Oenothera biennis.
Or, visit the Edible Wild Foods website page on Evening Primrose - Oenothera biennis.
Evening Primrose
Oenothera biennis
Above: Evening Primrose along retaining pond in Madison, Wisconsin. (7/30/21).
Above: Evening Primrose in Oak Savanna in Madison, Wisconsin. (8/19/18).
Above: Evening Primrose in Oak Savanna in Madison, Wisconsin. (8/01/19).
Above:Evening Primrose in Oak Savanna in Madison, Wisconsin. (7/31/20).
Above: Evening Primrose in Oak Savanna in Madison, Wisconsin. (7/29/20).
Above: Evening Primrose in Oak Savanna in Madison, Wisconsin. (7/28/19).
Above: Evening Primrose in Oak Savanna in Madison, Wisconsin. (7/26/19).
Above: Evening Primrose in Oak Savanna in Madison, Wisconsin. (7/25/19).
Above: Evening Primrose in Oak Savanna in Madison, Wisconsin. (7/24/19).
Above: Evening Primrose in Oak Savanna in Madison, Wisconsin. (7/23/19).
Above: Common Evening Primrose seed pods along shore of the Retaining Pond on the corner of Nakoma Road and Manitou Way in Madison, Wisconsin. (12/1/20).
Above: 1885 floral illustrationn from Germany.
Above: Evening Primrose specimen collected on Lands' End Lane in Dodgeville, Wisconsin. (8/10/1995).
Above: 1933 Evening Primrose illustration by Mary Vaux Walcott. Smithsonian American Art Museum, Gift of the artist.