Shrubs, not root-suckering. Phyllodes mostly acutely inclined to stem, those immediately below the inflorescence sometimes spreading to ca. 90 degrees, oblong to narrowly elliptic or narrowly oblanceolate, straight to slightly falcate, 2.5–5 mm wide; margin commonly distinctly indented around the gland; apex usually asymmetrically rounded, typically distinctly pruinose. Flowers Aug., Sept.
CVU, HNF. Known only from Mt Typo near Cheshunt, where dominant over much of the mountain, and nearby areas (Rose River, Bennies-Mt Cobbler Rd). Occurs in dryish montane to subalpine forest, mostly on rather shallow soils.
Acacia boormanii subsp. gibba is characterised by its broader phyllodes (2–5 mm wide) which are distinctly glaucous when young. This subspecies, which hybridises with A. pravissima, may resemble narrow phyllode forms of A. kettlewelliae but is distinguished by its narrower pods (c. 5 mm wide) and insignificant gland.
