Early explorers often described Rottnest Island as a heavily wooded area. Unfortunately, ~200 years of bushfires and farmland clearing has stripped much of the island of its large trees, and when combined with limited fresh water and a fragile environment, natural recovery has been limited. A conservation program that includes reforestation is ongoing, and an island-based nursery is working on growing and breeding flora endemic to Rottnest Island.
There are three woodland tree species endemic to Rottnest Island – the Rottnest Island teatree (Melaleuca lanceolata), the Rottnest Island pine (Callitris preissii), and the summer-scented wattle (Acacia rostellifera).
Walking or biking around the island during spring and summer you’re bound to see the bright flowering Rottnest Island daisy (Trachymene coerulea) identified by their clusters of tiny blue flowers above tall flower spikes. When strolling closer to the coastline of the island, you might come across some dune flora including beach spinifex (Spinifex longifolius), wild rosemary (Olearia axillaris), and searocket (Cakile).
Rottnest Island is an A-Class Reserve meaning that all flora and fauna inhabiting Rottnest Island are protected by law.