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Weed Habitat 

  • Grows in disturbed areas such as roadsides, drainage channels, and overgrazed pastures, often-in dense swards along rivers and floodplains.


  • A vigorously growing, very competitive, woody shrub, which grows 1.5-2.5 meters high and 1 meter wide.
  • Normally an annual, but plants which have been slashed often reshoot, flower and last for a further year.
  • Leaves are divided into 3 opposite pairs, about 4cm long and 2cm wide, rounded at the ends and wedge-shaped at the base.
  • Flowers are yellow, small, about 1cm across with 5 petals.
  • Seedpod is 10-15cm long, 3-5cmm slender and sickle-shaped.

ACTION: For control information contact your local government weed inspector or your Biosecurity Queensland Land Protection Officer.

Senna obtusifolia


Plant Type

Leaf Arrangement

Other weed identifiers

Plant Life Cycle

Weed Declaration

This Species is declared C2 under the Lands Protection (Pest and Stockroute Management) Act 2002.
For further information on declaration refer to the NR&W Pest Fact series.

Weed Spread