Silybum
 Silybum (milk thistle) is a genus of two species of thistles in the daisy family (Asteraceae). The plants are native to the Mediterranean regions of Europe North Africa and the Middle East. The name milk thistle derives from a feature of the leaves which are prominently banded with splashes of white. Historically these milky bands were said to be Mother Mary's milk and this is the origin of another common name St. Mary's thistle.