Mike young leaves are often hairy in Tick Indigo. An earlier sighting by Julie Lidner also noted the unusual form of plants in this area - probably worth a collection and lodging with CSIRO herbarium but you will need a permit to make a collection - I am in the process of organising a CNM group permit but more to come on that.
Michael I submitted a specimen to the herbarium a few years ago when I had a license to collect and it was identified as Indigofera adesmifolia. Dave Mallinson told me that he had also lodged a specimen much earlier than me with the same result . It is different it has never produced seed it doesn't have the same form as I.adesmifolia and it tends to sucker.