Description ⁴

Carduus acanthoides, known as the spiny plumeless thistle, welted thistle, or plumeless thistle, is a biennial plant species of thistle in the sunflower family (Asteraceae). The plant is native to Europe and Asia and introduced in many other areas, where it is sometimes considered an invasive species.
https://en.wikipedia.org/wiki/Carduus_acanthoides

Sources and Credits

1. (c) Stefan.lefnaer, some rights reserved (CC BY-SA), http://commons.wikimedia.org/wiki/File:Carduus_acanthoides_sl11.jpg
2. (c) zmcdermott, some rights reserved (CC BY-NC)
3. Jacob Sturm, no known copyright restrictions (public domain), http://commons.wikimedia.org/wiki/File:Carduus_acanthoides_Sturm9.jpg
4. (c) bioblitzbanff, some rights reserved (CC BY-SA)

More Info

• iNaturalist.ca taxon page
• Biodiversity Heritage Library
• BOLD Systems BIN search
• Calflora
• CalPhotos
• eFloras.org
• Flora of North America (beta)
• Global Biodiversity Information Facility (GBIF)
• HOSTS - a Database of the World's Lepidopteran Hostplants
• IPNI (with links to POWO, WFO, and BHL)
• Jepson eFlora
• NatureServe Explorer 2.0
• SEINet Symbiota portals
• Tropicos
• USDA PLANTS database
• VASCAN by Canadensys
• World Flora Online

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