Acacia lullfitziorum is a shrub belonging to the genus Acacia and the subgenus Phyllodineae that is endemic to south west Australia
The spreading spinose shrub typically grows to a height of 0.2to and a width of 0.4to. It generally has a prostrate or diffuse habit and will often form low-domed shaped mats. It has glabrous or shortly haired branches that divide into multiple, short, and spinose branchlets that have scarious stipules with a length of . Like most species of Acacia it has phyllodes rather than true leaves. The thin and glabrous phyllodes have an oblong to elliptic or ovate shape with a length of and a width of and have a non-prominent midrib.[1] It blooms from August to October and produces yellow flowers.
The species was first formally described by the botanist Bruce Maslin in 1999 as part of the work Acacia miscellany. The taxonomy of fifty-five species of Acacia, primarily Western Australian, in section Phyllodineae (Leguminosae: Mimosoideae) as published in the journal Nuytsia. It was reclassified as Racosperma lullfitziorum by Leslie Pedley in 2003 then transferred back to genus Acacia in 2006.[2]
It is native to an area in the Great Southern and Wheatbelt regions of Western Australia where it is commonly situated among granite rocks, on gravelly rises and in damp areas growing in gravelly, sandy, clay or loamy soils. It has a scattered distribution from around Coorow in the mnorth west to around Mount Barker in the south east.