Barbarea verna, Asch. (Barbarea proecox, Sm.)
Time of bloom: April to June.
Seed-time: June to August.
Range: Massachusetts to Virginia, and westward to Missouri.
Habitat: Fields, meadows, and waste places.
Often cultivated for winter salads, frequently escaping and now thoroughly naturalized as a weed. A more slender plant than the preceding species, its root-leaves more finely divided, having five to eight pairs of lateral segments. Flowers smaller and a paler yellow. Pods much longer, sharply four-sided, slightly compressed on short and very thick pedicels. Seeds smaller, more numerous, brown and flattened.
Means of control the same as for Winter Cress. The smooth, glossy surface of these two Mustards renders them impervious to injury from sprays.