Eryngium planum

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Legend for Species Pages

sea holly, plains eryngo, cross-thistle

Eryngium planum L.

  • Occurrence in Alberta – Y
  • Global Invasive Species Database –
  • NatureServe Rank –
  • Haber, Upland –
  • Haber, Wetland –
  • CWF, Status & Invasive Range –
  • Alberta Revegetation Guidelines –
  • The Nature Conservancy –
  • CBCN –
  • AB Weed – N


A garden escape, originating from Eurasia.

[1] Link to Wikipedia, Eryngium planum "..Eryngium planum (flat sea holly) is a species of flowering plant in the family Apiaceae, native to the area that includes central and southeastern Europe and central Asia. It is an herbaceous perennial thistle growing to 50 cm (20 in) with branched silvery-blue stems, and numerous small blue conical flowerheads surrounded by spiky bracts in summer..."

[2] Link to USDA Plants Profile for Eryngium planum L., plains eryngo

The following photos were taken in a disturbed area near a Red Deer golf course:

sea holly, Photo: Tony Blake
sea holly foliage, Photo: Tony Blake
sea holly flower head, Photo: Tony Blake