detox tea evening - LIVER DETOX HERBAL TEA, 14 Days - burdock root milk thistle, 3 Packs (42 bags) More facts about the milk thistle. The milk thistle (Silybum marianum) plant goes by many different names, including Scotch thistle, holy thistle, Mary thistle, variegated thistle. The Mediterranean native plant is particularly fond of growing in rocky, dry regions. All parts of these tall and thorny biennial flowering plants can be eaten. The seeds can be harvested and you can cook and consume both the leaves and flower heads. The milk thistle's purple flowers sit on top of spiky heads, and it is also known for its bright green foliage with white marbling.