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''Cirsium horridulum'', called bristly thistle, horrid thistle, yellow thistle or bull thistle, is a North American species of plants in the thistle tribe within the sunflower family. The species is native to the eastern and southern United States from New England to Florida, Texas, and Oklahoma as well as to Mexico, Belize, Guatemala, Honduras, and the Bahamas.

Thomas Nuttall described var. ''megacanthum'' as "one of the most terribly armed plants in the genus."

''Cirsium.. more

Similar species: Asterales
Species identified by Joe Spandrusyszyn
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By Joe Spandrusyszyn

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Uploaded Feb 7, 2019. Captured Jan 29, 2019 13:06 in Long Pine Key Nature Trail, Homestead, FL 33034, USA.
  • ILCE-6300
  • f/5.6
  • 1/1000s
  • ISO320
  • 300mm