Capsella rubella

Capsella rubella, the pink shepherd's-purse, is a plant species in the genus "Capsella", a very close relative of "Arabidopsis thaliana" and a member of the mustard family, Brassicaceae. It has a very similar appearance to "Capsella bursa-pastoris", but "C. rubella" has a diploid genome, whereas "C. bursa-pastoris" is tetraploid. "Capsella rubella" is used as a model plant to study the evolution of self-incompatibility into self-compatibility in plant reproduction. The species is found mostly in Mediterranean region. Separation of this species from its closest ancestor is predicted to have happened around 30,000 to 50,000 years ago.