Onopordum acanthium

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Legend for Species Pages

Scotch cottonthistle

Onopordum acanthium L.

  • Moss, Flora of Alberta – No

  • [1]Global Invasive Species Database – Yes
  • "...native to Europe and Asia. It has been introduced to temperate climates elsewhere, including much of North America and Australia. In North America, Onopordum acanthium is a weed problem on western rangeland and produces significant economic losses for ranchers. Seeds are dispersed locally by wind, humans, water, livestock, and wildlife are involved in long distance dispersal..."

  • [2]NatureServe I-Rank – Not yet assessed

  • AB Weed Act status – ?


[3] Link to Wikipedia, Onopordum acanthium - "...native to Europe and Asia. The plant prefers habitats with dry summers, such as the Mediterranean region, growing best in sandy, sandy clay and calcareous soils which are rich in ammonium salts. It grows in ruderal places, as well as dry pastures and disturbed fields. Its preferred habitats are natural areas, disturbed sites, roadsides, fields, and especially sites with fertile soils, agricultural areas, range/grasslands, riparian zones, scrub/shrublands valleys and plains along with water courses..."

[4] Link to USDA Plants, Profile and map for Onopordum acanthium L., Scotch cottonthistle

Scotch thistle, Onopordum acanthium, Plant(s) (licensed under a Creative Commons Attribution 3.0 License.)
Scotch thistle Onopordum acanthium, Flower(s) (licensed under a Creative Commons Attribution 3.0 License.)