The 1992 Census includes both native and exotic plant species.
You can search by genus only, or use % as wildcard, ( ie Acacia long% )
The results will be preceded by a letter (below) indicating which botanic garden is growing the plant.
A five-letter abbreviation of the plant's family is also shown ( ie Myrta = Myrtaceae ).
C = Canberra - Australian National Botanic Gardens, ACT
.M = Melbourne - Royal Botanic Gardens, Melbourne, VIC
..A = Adelaide - Adelaide Botanic Gardens, SA
...L = Mt.Lofty - Mt Lofty Botanic Gardens, near Adelaide, SA
....W = Wittunga - Wittunga Botanic Gardens, near Adelaide, SA
.....K = King's Park - Kings Park and Botanic Gardens, Perth, WA
......D = Darwin - Darwin Botanic Gardens, NT
.......B = Brisbane - Brisbane Botanic Gardens, Mt Coot-tha, QLD
........H = Hobart - Royal Botanical Gardens, Hobart, TAS
.........S = Sydney - Royal Botanic Gardens, Sydney, NSW
..........N = Mt.Annan - Mt Annan Botanic Gardens, near Campbelltown, NSW
...........T = Mt.Tomah - Mt Tomah Botanic Gardens, Blue Mountains, NSW
Checklists of holdings of these Gardens can be obtained from this database - checklist files are very large.
A percent sign % in the search box will retrieve the whole file.
^C in the search box will retrieve all plants growing in the Canberra gardens.
^...L in the search box will retrieve all plants growing in the Mt Lofty gardens etc.