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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

13. Blessed Milk Thistle

Blessed Milk Thistle (Silybum marianum)

 blessed milk thistle

  • Creamy white veins cover its foliage
  • Large (2 to 3 inches in diameter) flower heads
  • Thistle-like purple bristles

blessed milk thistle

Photos by Mitch Bixby