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Rattlesnake master inflorescences consist of whitish-green spiky balls 1/2-1" across made up of small florets enclosed by prickly bracts; the florets have five short, rounded petals, five stamens, and a long, divided white pistil that protrudes well beyond the edge of the floret. Note that, if you're bitten by a rattlesnake, this plant will be of no use to you whatsoever.
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Eryngium

Eryngium yuccifolium

rattlesnake master [Jun-Sep]

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I want to acknowledge the work of a friend and colleague, Dr. Fred Donner. We both share a passion for the flowers in Jackson Park. Fred's website (jacksonparkwildflowers.org) inspired me to build my own website and database; use and enjoy them both.

I am also pleased to thank my ninja web gurus and coders, Lindsey Young and Stefanie Engstrom. This site would not exist without their herculean labors.

Copyright 2026 © Michael LaBarbera

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