Summer blooms - Rattlesnake Master

A warm season native prairie forb growing 2 to 5 feet tall, the Rattlesnake Master grows spiked clusters of flowers that bloom into tiny 5 petaled flowers. These unique plants attract a wide variety of bees, butterflies, and insects that feed on the nectar. The flower heads have an almost honey like odor The leaves are long and low with prickled edges at various junctions resembling those of the yucca plant's.

Native Americans would use the dried seed-heads as rattles.
Pilgrims thought the root of the plant would work as an antidote to bites from the rattlesnake (which it does not).