Elaeocarpus arnhemicus, commonly known as elaeocarpus,[2] blue plum, bony quandony or Arnhem Land quandong,[3] is species of flowering plant in the family Elaeocarpaceae and is native to northern Australia, New Guinea, Timor and certain other islands in the Indonesian Archipelago.

It is a tree with narrow elliptic to lance-shaped or egg-shaped leaves with serrated edges, racemes of white or cream-coloured flowers and metallic blue fruit.

There are between fifteen and eighteen, sometimes up to twenty, stamens and the style is 1.2–2 mm (0.047–0.079 in) long and glabrous.

[6] Elaeocarpus arnhemicus was first formally described in 1868 by Ferdinand von Mueller in his book Fragmenta Phytographiae Australiae.

[6] Blue plum grows in riparian rainforest and some other habitats in the northern part of the Northern Territory, Cape York Peninsula, north-east Queensland and New Guinea at altitudes up to 500 m (1,600 ft) above sea level.