Capsella grandiflora

Capsella grandiflora is a species of flowering plant in the Brassicaceae family. It is referred to by the common name grand shepherd's-purse and is a close relative of "Arabidopsis thaliana". It is predicted together with Capsella orientalis to be the surviving progenitor of Capsella bursa-pastoris.
The main signature of this plant compared to other "Capsella" species is its wide flower petals. Together with "Capsella rubella", this plant is used as a model plant to study the evolution of self-incompatibility into self-compatibility in plant reproduction.