Oenothera biennis L.
Usually an erect biennial or winter annual. Occasionally a summer annual.
Common eveningprimrose plant.
Alternate, narrow oval-shaped, smooth to slightly wavy leaf margins, with distinctive pink to white mid-veins. Leaves initially develop from a basal rosette.
Erect, semi-woody, approaching 5 feet in height. Stem usually branches only at the top and may be visible through the winter.
Flowers and fruit
Flowers are yellow, attached to fused sepals forming a tube and found in terminal spikes. Seed capsules are woody, cylinder-shaped and thickest near the bottom.
Cutleaf eveningprimrose (O. laciniata Hill) Differs by having a prostrate to moderately erect, branching stem; wavy and coarsely toothed leaves; yellow to reddish flowers in the upper and middle leaf axils; and linear, cylinder-shaped seed capsules.
Print a PDF of this page: Common eveningprimrose
The MSU IPM Program maintains this site as an access point to pest management information at MSU. The IPM Program is administered within the Department of Entomology, fueled by research from the AgBioResearch, delivered to citizens through MSU Extension, and proud to be a part of Project GREEEN.