Siam

This week's weed is annual Siam. It is classified as a RESTRICTED species. It is a dense tangling bush that quickly invades and smothers native vegetation.

WHAT TO LOOK FOR

  • Dense tangling bush up to 2-3 meters tall.
  • Scrambles up trees to 20 m.
  • Fibrous, shallow root system with a basal ball.
  • Leaves are soft, green, hairy and roughly triangular with distinctive 3 vein pattern.
  • Flowers are pale lilac, appearing white from a distance.

LOOKS LIKE

  • Blue top or billy goat weed

WHY IT'S BAD

  • Quickly invades and smothers native vegetation.
  • Out-competes native vegetation.
  • Increases frequency and intensity of bushfires.

WHAT TO DO

  • This plant must NOT be given away, sold, or released into the environment. Penalties may apply.
  • Please report any sightings of this plant to council for advice on control options.

MORE INFORMATION

https://www.business.qld.gov.au/.../restricted/siam-weed

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