sibirica is most closely related to A. kempeana. Distribution In it is found on rocky ridges, breakaways in skeletal sand soils in inland areas of all states of mainland Australia except Victoria. In Western Australia it is found in the Mid West, Pilbara and Goldfields-Esperance regions where it grows in stony red sandy-clay-loam soils over ironstone, basalt or laterite. In the Northern Territory it is found in the IBRA bioregions of Burt Plain, Central Ranges, Channel Country, Finke, Gibson Desert, Great Sandy Desert, Great Victoria Desert, Little Sandy Desert, MacDonnell Ranges, Mitchell Grass Downs, Mulga Lands, Pilbara, Simpson Strzelecki Dunefields, Stony Plains, and Tanami, and occurs on rocky or gravelly ranges, hills or rises composed of neutral or acidic rocks, sandplains, low sandy rises, dunefields, Mulga-dominated red earth plains, and creek floodouts. See also List of Acacia species References sibirica Acacias of Western Australia Flora of South Australia Flora of the Northern Territory Flora of Queensland Flora of New South Wales Plants described in 1899