Investigation - including checking with two of the authors of "Mangroves to Mountains" that I know, has identified it as Goodenia bellidifolia subsp argentea or Rocket Goodenia.
It is reported to be one of the host plants for the Meadow argus butterfly. I have been unable to track down why it is called "Rocket Goodenia" but maybe it is something to do with the shape of the leaves that look a little like the vegetable called rocket. As it was on the road verge I have relocated some to our property. I hope it grows successfully and propagates well to help attract the Meadow argus butterfly and also to provide some colour to our garden.
ref: Mangroves to Mountains rev. ed. Leiper G, Glazebrook J, Cox D, Rathie K.
Logan River Branch of SGAP.
