Ryu, they look to be growing from half-buried wood. Am I right? If so then it's a species of Mucronella. From recollection there are two species in the ACT, but I'll check on that.
I'm not quite sure. The Fire trail was about 0.5m below the surrounding ground level. This, from memory, was growing on something protruding probably around the middle of the vertical soil 'walls' of the fire trail