Common Winter Cress
    or Yellow Rocket
Common Winter Cress
    or Yellow Rocket
Barbarea vulgaris
Mustard Family - Brassicaceae or Cruciferae
The small (about 3/8 inch wide) yellow flowers have four petals and 6 stamens and form upright terminal clusters. Seedpods are narrow and upright (1 to 1.5 inches long). The stalked basal leaves are 2 to 5 inches long with 4 to 8 paired lobes and a large, rounded terminal segment. Stem leaves are somewhat egg-shaped, coarsely toothed and generally clasp the stem.
(Photographed - late May)
This 1 to 2 foot tall introduced species is common along roadsides and in meadows.
  Pathology Images Inc. 2000 to 2002