Creeping yellow cress (Rorippa sylvestris)
ODA rating: B Other common names yellow fieldcress Description Perennial; flowers June to August. Grows up to 20 in tall. Leaves 2 to 4 in long and pinnately divided into narrow, sharply toothed lobes. Flowers yellow with four small petals. Impacts A common pest of Netherland ormamental bulb production areas. This plant can reduce bulb crop value and marketability as a contaminate of nursery stock. It invades disturbed wetlands, and some evidence suggests that this species may be allelopathic. Click on photo below to view larger image | | | | | Images courtesy of Weed Science Society of America | | If images are downloaded and used from the ODA web site please be sure to credit the photographer. Distribution in Oregon Can be found as pest in some agriculture crops in Western Oregon.   Biological controls No approved biological control agents are available. Informational links WeedMapper
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