The Victorian Volcanic Plains (VVP) covers a wide area. The native plant remnants that remain, are few and far between which increases their importance as remaining habitat for endangered species. This map show the VVP in the light colour from Melbourne to Portland. Click on it to enlarge. This map is taken from the biodiversity interactive map on the Department of Environment Land Water and Planning website.
If you wish to get a better idea on what may be in your area look at the biodiversity interactive mapping. Remembered this is modeled mapping and the only way to be sure of what is present is to check on ground. If you don’t know what to look for ask around and find a local expert from landcare or the field naturalists. You may have to employ a consultant ecologist.