There are over 60,000 known tree species on earth. Brazil has the most tree species in the world.

Here in Australia, it is home to approximately 24,000 different species of native plants. Some of the most common species are Acacia (Wattles), Eucalypts (Gum trees), Proteaceae (Banksias, Grevilleas) and Melaleuca (Paperbarks).

Source:

https://www.aussietreesolutions.com.au/interesting-facts-about-trees/

https://www.australia.com/en/facts-and-planning/about-australia/australias-plants.html