I think it is this common and variable taxon but I am not sure. Poor image doesn't help:)
Biconvex culm (Photos 3 & 5). 4th photo shows leaf. Growing in fairly dry open grassy vegetation. Seems to be Valley Heathy Forest (EVC 127).
This population has been the subject of control. A small amount of regrowth has grown.
Extensive prostrate, scrambling and weakly twining shrub. Currently infertile. Second specimen seen at Port Sorell.