Wildflowers of Toronto's High Park​​

Evening-primrose, common
​Oenothera biennis

​Family: Evening Primrose
Biennial
Native to Ontario

Blooms: July to October
Habitat: Open dry sandy sites

​Height: up to 2 m 
Flower: 1.5 - 2.5 cm held above an inferior ovary.

Flower opens in the evening and usually closes by noon. Pollinated by moths.