Capsella bursa-pastoris is a common, early-flowering species of sunny, disturbed sites. It is native to Europe and northern asia and is now found in all 50 states and throughout North America.
The flowers are numerous and small, with four white petals. The most conspicuous feature is the presence of the triangular fruits. The stem leaves are clasping at the base. It is an annual species and several generations may be produced even in our relatively short northern growing season. There are many species of the Brassicaceae family in Wisconsin.