Santalum acuminatum

Because it is one of the few drought-tolerant fruit trees in far-west New South Wales, it is popular to grow among many Aboriginal communities and the non-Indigenous Australians who are aware of it.

[3] The slender to ovate leaves are pointed at the tip, and are pale yellowish-green bringing a slightly grey and leathery appearance.

[4] Flowers can be green or creamy white on the outer parts, reddish or yellowish brown on the inner faces; these appear on stems, are just 2–3 mm across, and are fragrant.

The species shares the common name quandong with other plants, bearing similar fruit; it may be distinguished as the "desert" or "sweet".

The species was first described by Robert Brown, named in Prodromus Florae Novae Hollandiae (1810) as Fusanus acuminatus, based on his type collection made at Fowlers Bay, South Australia, in 1802.

[4] The number of recorded specimens in this region is low, and mainly restricted to coastal sandplains, its range having been impacted by altered land-use in the wheatbelt.

The taxa recorded in this relationship are species of genera; Acacia, Maireana, Atriplex, and many others, including hemiparasites such as Exocarpos sparteus.

[23] The tree occupies a diverse and widespread range of habitats, including creek beds, granite, gravel plains, and sandy dunes.

The environs of the distribution range are subject to frequent bushfires, this requires the plant to regenerate from its roots, so the species is rarely found as an advanced tree.

An occurrence of an unmolested specimen is recorded at Woodman Point in Western Australia, an area remote from the high-intensity fires of altered regimens.

The fruit and nut were important foods to the peoples of arid and semiarid central Australia, especially for its high vitamin C content.

Commercial trials and propagation by enthusiasts have attempted to reproduce the circumstances of its native habitat; well-drained soil, germination techniques, and selection of appropriate hosts have been more successful.

[29] Research and trials were undertaken in South Australia by grafting Frahn's Paringa Gem onto seedling rootstock; this is how the cultivar is propagated in orchards, and the first sale of the variety was in 1997.

[19] Host plants are needed in the establishment of an orchard; the species selected for this purpose impart factors affecting growth, resistance to infestation, and the harvest.

The study of Melia azedarach (white cedar) as a host to this species revealed that S. acuminatum acquired insecticidal compounds that increased its resistance to the quandong moth.

Researchers then determined that neurotoxins found in the host plant, and other substances harmful to mammals, can pass into the harvested fruit.

[30] Soil-borne agents of disease, such as Phytophthora and Pythium fungal species, may be present where the plant's preference for well-drained soil is not provided.

Nurseries have found the plant to be responsive to the treatments prescribed, if its presence is suspected, such as phosphorous acid soil applications.

This harvest is able to be protected from infestation, and is an easily identifiable source, meeting the requirements of food safety guidelines for commercial ingredients.

[32] The commercial use of the fruit includes its addition to sweet and savoury foods; the flavour is tart and reminiscent of peach, apricot, or rhubarb.

The more widely known Australian sandalwood, S. spicatum, was extensively harvested and exported, leaving S. acuminatum as the more common Santalum in many regions.

The established use of the fruit, by Aboriginal peoples, was acknowledged by the early settlers of the colonies; this product was made into jam and chutney.

The fruit is frequently mentioned in natural histories and botanical works, such as Flowers and plants of Western Australia,[8] and traded as a commodity, however, the kernel of the seed has, historically, been the most extensively used.

Colonial ethnic groups did not attempt to domesticate indigenous plants in Australia, despite being known and occasionally used, but the great demand from export markets to Singapore, Britain, and elsewhere led to financial backing of growers and enthusiasts.

The couple recorded yield and qualities of the fruit, one of which became the source for the variety registered and marketed as Frahn's Paringa Gold.

A desert quandong nut on a piece of paperbark
Leaves and a fruit of quandong, detail of sketch by Olive Pink (1930)