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Practical Weed Science for the Field Scout: Corn and Soybean

Eveningprimrose, cutleaf (Oenothera laciniata)

Winter annual broadleaf

Cutleaf evening-primrose is almost always a biennial or a winter annual unlike common eveningprimrose which is more often a summer annual. Cutleaf eveningprimrose has leaves with deeply toothed margins and produces many showy yellow or red flowers. Leaves initially develop as a basal rosette. Young leaves have margins that are untoothed, but subsequent leaves have toothed margins. Mature plants have leaves that are lanceolate in outline, are relatively narrow with a white midvein, and have deeply toothed margins. The fruit is a capsule that is about 3/4 to 1-1/2 inches long and often curved.
 

IPM1007, revised November 2009

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