Rorippa sylvestris (the creeping yellowcress,Rorippa sylvestris at USDA PLANTS Database keek, or yellow fieldcress; syn. Radicula sylvestris (L.) Druce Rorippa sylvestris at The Herbarium of Louisiana State University) is an invasive speciesRorippa sylvestris at Invasive.org of plant in the United States, likely entering from Europe before 1818 from ballast water and spreading throughout North America through contaminated nursery seed stock.
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