Small-flowered bittercress

Flower: Elongating clusters of stalked flowers at the top of the stem and at the end of branching stems in the upper plant. Flowers are about 1/8 inch across with 4 rounded, erect to spreading white petals and 6 pale yellow stamens in the center. The 4 sepals behind the flower are green or tinged purple, mostly oblong, about half as long as the petals.
Leaves and stems: Leaves are compound, basal and lower stem leaves up to 4 inches long with 2 to 6 pairs of linear to oval leaflets and a terminal leaflet that is usually broader and more round. Basal leaves typically wither away by flowering time. Upper stem leaves have narrower leaflets, the end leaflet similar in size as the lateral leaflets, sometimes slightly larger. Stems are green, sometimes purple near the base, hairless or hairy to varying degrees, unbranched except near the flowers. It can be leafy but often has a spindly appearance.