The mulga apple, is an Australian bush tucker food, often eaten by Aborigines

Indigenous Australians

Indigenous Australians are the original inhabitants of the Australian continent and nearby islands. The Aboriginal Indigenous Australians migrated from the Indian continent around 75,000 to 100,000 years ago....

 of Central Australia

Central Australia

Central Australia/Alice Springs Region is one of the five regions in the Northern Territory. The term Central Australia is used to describe an area centred on Alice Springs in Australia. It is sometimes referred to as Centralia; likewise the people of the area are sometimes called Centralians...

.

The mulga apple is in fact a combination of plant and animal; the insect gall

Gall

Galls or cecidia are outgrowths on the surface of lifeforms caused by invasion by other lifeforms, such as parasites or bacterial infection. Plant galls are abnormal outgrowths of plant tissues and can be caused by various parasites, from fungi and bacteria, to insects and mites...

 grows inside the wood of the mulga

Mulga

Acacia aneura, commonly known as Mulga or True Mulga, is a shrub or small tree native to arid outback Australia of areas such as the Western Australian Mulga shrublands.-Description:...

 tree (Acacia aneura).

Mulga apple is known as Merne ataltyakwerle in the Arrernte language of Central Australia.

It grows on the end of the mulga branches. Aborigines eat them raw or cook them in hot earth. Mulga trees grow in flat country and at the foot of hills.