Field pennycress
Field pennycress
Thlaspi arvense
Mustard Family - Cruciferae
An upright, thin-looking herb due to the narrow leaves hugging the smooth stem. Few if any basal leaves. Leaves elliptical, toothed, alternate and with a lobed base clasping the stem. The white 4-petalled flowers are tiny (about 1/8 inch wide). Seed pods nearly round, flat and with a distinct apical notch. (Photographed - May)
  Pathology Images Inc. 2002 2002