Centaurea solstitialis

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Legend for Species Pages

Yellow Starthistle

Centaurea solstitialis L.
  • Moss, Flora of Alberta – Rare
  • Global Invasive Species Database – Yes[1]
  • NatureServe Rank – High
  • Haber, Upland – No
  • Haber, Wetland – No
  • CWF, Status & Invasive Range – No
  • Alberta Revegetation Guidelines – No
  • The Nature Conservancy – Yes, w/ ESA
  • CBCN – No
  • AB Weed – Prohibited Noxious


Forms dense stands, excluding native vege and altering water table, poisionous to horses, ISSG, BC AB SK MN ON

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

Centsols XID Centaurea solstitialis6.jpg
Centsols XID Centaurea solstitialis5.jpg
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Centsols XID Centaurea solstitialis seedling3.JPG


Roché C.T., and B.F. Roché Jr. 2000. Identification of Knapweeds and Starthistles in the Pacific Northwest: PNW432. Pacific Northwest Extension Publication. 22 pp. [3]

Alberta Invasive Plant Council factsheet: https://www.invasiveplants.ab.ca/Downloads/FS-YellowStarthistle.pdf

Canada's Least Wanted Invasive Plants [4]