White Rattlesnake-root (Prenanthes alba) White rattlesnake-root, also known as White Lettuce, is a shade-loving member of the aster family that flowers in the late summer. The plant pictured was in a wooded section of the Paul Bunyan Trail north of Hackensack Minnesota. Native Americans used Rattlesnake-root for many medicinal purposes. In particular, the Iroquois used …