Acacia torticarpa is a shrub of the genus Acacia and the subgenus Plurinerves that is endemic to a small area in western Australia.
The shrub has branchlets are hairy and marked with parallel grooves and have persistent stipules that have a length of . Like most species of Acacia it has phyllodes rather than true leaves. The hairy and leathery evergreen phyllodes are patent to inclined and have a narrowly linear to oblanceolate-linear shape and are usually incurved with a length of and a width of and have six distant and raised nerves.[1] It is thought to bloom in July when it produces simple inflorescences that occur in pairs in the axils with spherical flower-heads that have a diameter and containing 17 to 18 yellow flowers. Following flowering hairy and leathery seed pods form that have a flexuose-linearshape with a length of up to and a width of . The glossy tan coloured seeds inside have an oval to elliptic shape with a length of .[1]
It was first formally described by the botanists Richard Sumner Cowan and Bruce Maslin in 1990 as a part of the work Acacia Miscellany. Some new microneurous taxa of Western Australia related to A. multineata (Leguminosae: Mimosoideae: Section Plurinerves) from Western Australia as published in the journal Nuytsia. It was reclassified as Racosperma torticarpum by Leslie Pedley in 2003 then transferred back to genus Acacia in 2006.[2] It is similar in appearance to Acacia caesariata.[1]
It is native to an area in the Wheatbelt region of Western Australia. It has a limited and disjunct distribution nd is only known from two populations near Yorkrakine and about further south around South Kumminin.[1]