Check out  the Australian Plants site of the Association of Societies for Growing Australian Plants (ASGAP) if you are interested in the cultivation, propagation, conservation and appreciation of Australia's native flora.

Local native flora of the Cooks River Valley in the Inner West suburbs of Sydney (including Marrickville, Dulwich Hill, Hurlstone Park, Earlwood and Campsie, to Chullora and Rookwood in the west, Bexley and Rockdale in the south) are listed by size and shape, rather than by family or flora region of origin. There is also a list of Waverley Council's indigenous plants, etc., thus, the categories listed here include trees, shrubs , climbers & trailers , ground covers, ferns , orchids and, lastly, grasses. at:--- http://www.ozemail.com.au/~casliber/cooksriverflora.html

Species occurrence by geographic region is a Government site that shows what species are found in a particular regions of Australia. You can click on a state/ territory to zoom in and query by 1:100,000 map sheet.    http://www.erin.gov.au/database/TAX994R.html