Flower:

Flowers are in rounded clusters at the top of the plant and at the tip of branching stems near the top of the plant. Individual flowers are white, about ¼ inch across, with 4 oval petals and 6 yellowish green stamens, 3 on each side of the flat ovary. The 4 green sepals behind the flower have whitish edges. The flower cluster elongates as the plant matures, with blooms at the stop and seeds forming below the blooms.

Leaves and stem:

There is a rosette of spatula shaped basal leaves that wilt away early. Stem leaves are 1 to 4 inches long and up to 1 inch wide, hairless, with irregular blunt teeth and a rounded or blunt point at the tip. The edges are often a little wavy. Leaves near the base of the plant may have short stems; those nearer the top are more clasping. Attachment is alternate. The main stem is ribbed and hairless.

Fruit:

Fruit is a flat oval pod about ½ inch long with a notch at the tip. It dries to a papery brown shell. Each side of the pod holds up to 8 seeds.

Notes:

The flowers of Field Pennycress are not very distinctive, but the seedpods are and make this plant easy to identify.