Ryu I think this is the garden herb Geranium robertianum, but I don't think it has been recorded as naturalised in the ACT before, so would e worth collecting a specimen, if my ID is right.
I will see if I can find it over the weekend (it may have lost all it's leaves by now). If I do find it, do I press it and take it to the herbarium? What are their opening hrs?
Ryu - probably wait until it is flowering if you take it to the CSIRO Black Mountain Herbarium you can drop a specimen off for David Albrecht during business hours.