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Rorippa palustris is often confused with:
Rorippa teres Rorippa teres fruits
Plants that fill a similar niche:
Adonis aestivalis Adonis aestivalis form
Allium canadense Flowers
Pilea nummulariifolia Leaves

Marsh Yellowcress Rorippa palustris

Previously known as:

  • Rorippa islandica
Phonetic Spelling
ro-RIP-uh pal-US-triss
Description

Marsh yellowcress and southern yellowcress (Rorippa teres), in the Brassicaceae (mustard) family, are very similar winter annual weeds, each widely distributed in the US. These species are most common on moist sites but will grow in many environments. Plants form a rosette with deeply-lobed leaves and erect, branched flower stalks. As plants age, leaves become more deeply lobed. In containers, marsh yellowcress often forms a single erect stem branched only in the inflorescence, but both species may form well-branched mounds. Flowers are yellow and form cylindrical fruit containing many small tan seeds. The species are differentiated by the fruit pods (siliques). Marsh yellowcress seed pods are on short (about 1/2 inch) stalks whereas southern yellowcress seed pods lack stalks or are on very short stalks. Both species germinate in fall or spring, in cool moist soils, and are well controlled by several preemergence herbicides. Herbicide efficacy rankings for these species are based on limited experimental data.

This plant is also known under the Latin name R. islandica.

See this plant in the following landscape:
Cultivars / Varieties:
Tags:
#weed
 
Cultivars / Varieties:
Tags:
#weed
  • Attributes:
    Genus:
    Rorippa
    Species:
    palustris L.
    Family:
    Brassicaceae
  • Whole Plant Traits:
    Plant Type:
    Weed
    Habit/Form:
    Erect
  • Fruit:
    Fruit Color:
    Cream/Tan
    Fruit Description:
    cylindrical fruit containing many small tan seeds
  • Flowers:
    Flower Color:
    Gold/Yellow
  • Leaves:
    Leaf Color:
    Green
    Leaf Type:
    Compound (Pinnately , Bipinnately, Palmately)
    Hairs Present:
    No
    Leaf Description:
    deeply-lobed, pinnate leaves
  • Stem:
    Stem Is Aromatic:
    No
  • Landscape:
    Problems:
    Weedy