Onopordum acanthium

Scotch Thistle at Symonston, ACT

Onopordum acanthium at Symonston, ACT - 12 Oct 2015
Onopordum acanthium at Symonston, ACT - 12 Oct 2015
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Identification history

Onopordum acanthium 17 Oct 2015 MichaelMulvaney
Onopordum acanthium 12 Oct 2015 Mike

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User's notes

Large patches under trees. Shows attack by introduced weevils.

1 comment

   18 Oct 2015
The photo of the leaf shows stem boring weevils at work, they were first released to control Scotch and Illyrian thistle in 1993, they weaken the plant and reduce seed production rather than killing it outright. the beetle larvae do most of the damage

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Nearby sightings

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Location information

Sighting information

  • 1,001 - 10,000 Abundance
  • 12 Oct 2015 08:40 AM Recorded on
  • Mike Recorded by

Species information

  • Onopordum acanthium Scientific name
  • Scotch Thistle Common name
  • Not Sensitive
  • Exotic
  • Noxious or High Risk Weed or Pest
  • Up to 827.86m Recorded at altitude
  • 70 images trained Machine learning
  • In flower
2,148,925 sightings of 19,884 species in 6,408 locations from 11,278 contributors
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