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Silybum marianum
spiny stems branch at the top, and reach a height of 4 to 10 feet. The leaves are wide, with white blotches or veins. Milk thistle gets its name from the milky white fluid that comes from the leaves when they are crushed. The flowers are red-purple. The small, hard-skinned fruit is brown, spotted, and shiny. Milk thistle spreads quickly (it is considered a weed in some parts of the world), and it matures quickly, in less than a year.
Milk thistle is native to the Mediterranean region, and is now found throughout the world. This stout thistle usually grows in dry, sunny areas.
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