HI Betty, When I photographed this I thought it was Hymenanthera dentata, then I saw some Discaria so I thought I must have been mistaken about the Hymenanthera. It is on the summit of Mt Murray deep in a rocky crevice with no weeds around so I doubt it would be Lycium. Michael Mulvaney tells me that Hymenanthera was recently recorded in the ACT for the first time, could this be it?