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Eryngium aquaticum
Also called Rattlesnake Master, Water Eryngo, Marsh Eryngo, Marsh Rattlesnake Master
Eryngium aquaticum is a species of flowering plant in the family Apiaceae known by the common name rattlesnakemaster, marsh rattlesnake master, corn-snakeroot, bitter snakeroot, and marsh eryngo. This plant is native to eastern North America.
This biennial or perennial herb grows up to 2 meters (6 ft 7 in) tall. The ribbed, erect stem branches toward the top. There are alternately arranged leaves which are lance-shaped and toothed on the edges. The basal leaves may be up to 90 centimeters (35 in) long by 9 cm (3.5 in) wide. The inflorescence contains white to blue flower heads with spiny, blue-tinged bracts.
Alpine Sea Holly · Amethyst eryngo · Eryngium arenosum · California eryngo · Coastal eryngo · Beethistle · Eryngium babadaghense · Baldwin's eryngo · Eryngium billardieri · Eryngium bithynicum · Amethyst Eryngo · Field eryngo
Text excerpted from the Wikipedia article Eryngium aquaticum by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
