I always thought this grass was R. auriculatum, but I have checked against some images and apparently the auricle is much more apparent and further down. I have no idea what this is.
Ahhh dear, I just had a look at my comments from Graeme & yup what you are mentioning is exactly the case. I'll undo the confirmation & perhaps we can have him look at this?
I just put this through the VICFlora and got to R. erianthum. Unfortunately I don't know if I would trust my abilities at using the key especially without measurements or better photos. I also ran this through the key and ended up with R. caespitosum (which I am reasonably happy with). Rytidosperma caespitosum (Ringed Wallaby Grass)