Owenia acidula, commonly known as Emu apple, is small or medium-sized tree of outback woodlands native to Australia. It may grow to ten metres tall.
The pinnate leaves are bright green and shiny, with leaflets 2-5 cm long. Broken twigs ooze a milky sap. The edible fruit is purplish-red with paler speckles, 2-4 cm wide with a large stone-like seed.
The fruit pulp is an Aboriginal bushfood and apparently causes hallucinations. They ripen after coming off the tree, and have a sour flavor.
Thanks to wikipedia.org