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This striking member of the daisy family has thorny, variegated foliage and purple blooms that resemble large thistles. Remove the blooms before seeds mature to prevent the plant from self-seeding and becoming weedy. When cut, the plant produces a white, milky liquid, which is how it got its name. The plant has been used for centuries as a treatment for diseases of the liver and gallbladder. In its native range, it is an annual, but it may overwinter in Zones 5-9.
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