Perennial pepperweed (Lepidium latifolium)

  • Perennial Pepperweed Plant 215x150

Category C Weed

Mustard family (Brassicaceae)

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    • Up to 6 ft. tall, semi-woody, waxy and lacks hair (glabrous); many stems can arise from each crown often branched near top; branches arise from leaf axils


      • Alternate, oval to lance-shaped, mostly 3-12 in. long, 1-3 in. wide, green to gray-green, lack hair and waxy; edges (margins) smooth to toothed and can also be curled; leaf bases DO NOT clasp stem; lower leaves larger than upper leaves


        • Small and white with 4 petals; arranged in dense clusters at the tips of stems

        • Seed pods are round, flattened, less than 0.1 in. diameter, usually covered with hairs; each has 2 chambers, each with 1 seed


          • Creeping root system


            • Grows best on moist sites; often found in floodplains, pastures, meadows, hay fields and along waterways; known to occur in all Nevada counties

            • Perennial; reproduces by roots and seed

            • Also known as tall whitetop


              • Mowing, digging, tillage, burning and grazing established stands are NOT effective

              • Apply metsulfuron or chlorsulfuron to actively growing plants through early-bloom; imazapic from full-bloom until plants become necrotic; 2,4-D and glyphosate at bud to flower can be effective if repeated for several years


                Perennial Pepperweed Infestation 215x150
                Perennial Pepperweed Plant 215x150
                Mature Plant
                Perennial Pepperweed Flower 215x150
                Perennial Pepperweed Leaves Stem 215x150
                Leaves on stem
                Perennial Pepperweed Seedling 215x150
                Nevada Noxious Weed Field Guide
                Nevada Noxious Weed Guide