http://it.wikipedia.org/wiki/Capsella_bursa-pastoris http://en.wikipedia.org/wiki/Capsella_bursa-pastoris http://upload.wikimedia.org/wikipedia/commons/e/e0/Capsella_bursa-pastoris_2.JPG http://en.wikipedia.org/wiki/File:Capsella_bursa-pastoris.JPG http://it.wikipedia.org/wiki/File:Root-system.jpg