Austrian fieldcress (Rorippa austriaca)


Category A Weed

Mustard family (Brassicaceae)

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Stem

  •  Up to 3 ft. tall and branched at the top

    Leaves

    • Bluish-green, 1-4 in. long and oblong to lance-shaped; edges (margins) are smooth to toothed

    • Stem leaves are alternate; leaf size decreases up the stem; bases of upper leaves have small lobes that clasp the stem

      Flower

      • Small yellow flowers (0.1 in. wide) with 4 petals; clustered at tips of branches

      • Seed pod is oval, 0.1 in. long and borne on a 0.3-0.6 in. long stalk

        Root

        • Thick, fleshy taproot with creeping roots

          Other

          • Grows best in moist, disturbed areas; often infests roadsides, waste areas, pastures and crop fields; not known to occur in Nevada

          • Perennial; reproduces by roots; forms dense patches

            Control

            • Hand removal of individual plants (including roots) can limit spread of small infestations

            • Repeated cultivation and improved drainage of wet areas have also been reported to be effective

            • Apply 2,4-D to actively growing plants

              Images

              Austrian Fieldcress Plant 215x150
              Mature Plant
              Austrian Fieldcress Plant Flowering 215x150
              Flowering Plant
              Austrian Fieldcress Flower 215x150
              Flower
              Austrian Fieldcress Rosette 215x150
              Rosette
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              Nevada Noxious Weed Guide