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Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Avenue, Room 1000, Portland, OR 97204

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What does it look like?

blessed milk thistleMilk thistle can grow to be six feet tall with distinctive white stripes in the leaves. Milk thistle is also very spiny, more so than bull thistle, with flowers and seedheads ringed by exceptionally sharp spines.