Bridal Creeper or Florist’s Smilax
This South African plant is one of WA’s worst environmental weeds. Birds eat the fleshy red berries and spread the weed. It is very invasive, dies down in summer then shoots rapidly and smothers other vegetation. A Weed of National Significance (WONS). Further information can be found at the WONS website.
See more on Florabase and Weeds Australia.