Queensland State Archives posted a photo:
Plums may have been one of the first fruits domesticated by humans. Three of the most abundant cultivars are not found in the wild, only around human settlements in the East European and Caucasian mountains and Asia. Plum remains have been found in Neolithic age archaeological sites along with olives, grapes and figs.
The name plum derived from Old English plume or “plum, plum tree,” which extended from Germanic language or Middle Dutch, prume, and Latin, prunum.
Plums are a diverse group of species. The commercially important plum trees are medium-sized, usually pruned to 5-6 metres height. The tree is of medium hardiness. Without pruning, the trees can reach 12 metres in height and spread across 10 metres. They blossom in different months in different parts of the world; for example, in about January in Taiwan and early April in the United Kingdom.
Fruits are usually of medium