Carduus nutans

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Legend for Species Pages

Nodding Thistle

Carduus nutans L.
  • Moss, Flora of Alberta – Occasional
  • Global Invasive Species Database – No
  • NatureServe Rank – High/Low
  • Haber, Upland – Minor
  • Haber, Wetland – No
  • CWF, Status & Invasive Range – Potential, BC, SK, AB, MB, ON, QC, NF, NB, NS
  • Alberta Revegetation Guidelines – No
  • The Nature Conservancy – Yes, w/ ESA
  • CBCN – Potential
  • AB Weed – Prohibited Noxious

Synonyms for Carduus nutans L.

  • Carduus macrocephalus Desf.
  • Carduus macrolepis Peterm.
  • Carduus nutans L. ssp. leiophyllus (Petrovic) Stojanov & Stef.
  • Carduus nutans L. ssp. macrocephalus (Desf.) Nyman
  • Carduus nutans L. ssp. macrolepis (Peterm.) Kazmi
  • Carduus nutans L. ssp. nutans
  • Carduus nutans L. var. leiophyllus (Petrovic) Arènes
  • Carduus nutans L. var. macrocephalus (Desf.) B. Boivin
  • Carduus nutans L. var. vestitus (H.M. Hallier) B. Boivin


Invasive in CO Montane meadows, displacing native vegetation

[1] Link to Bugwood Invasipedia for extensive information on biology, ecology, and management of this species.

Alberta Invasive Plants Council factsheet:

[2] Link to USDA Plants profile for Carduus nutans L. nodding plumeless thistle

[3] Link to NatureServe I-Rank info for Carduus nutans L.

[4] Link to Missouri Department of Conservation, Vegetation Management Guideline, Carduus nutans L.

Cardnuta 1.jpg
Cardnuta 2.jpg
Cardnuta XID Carduus nutans2.jpg
photo: L. Hamilton