Acacia calligera (Pedley) Pedley

Spreading, glabrous, resinous shrub mostly 0.5–1.5 m high, sometimes flat-topped. Branchlets with prominent, resin-crenulated ribs. Phyllodes patent to ascending, mostly ovate to elliptic or oblong-elliptic and often dimidiately so, occasionally ±orbicular, straight or rarely slightly recurved at apices, often slightly to markedly undulate, (0.3–) 0.5–1.5 (–2) cm long, (2–) 3–7 (–8) mm wide, l: w ratio = 1–3, green to ±glaucous, marginal vein yellowish, (3–) 5–7-veined, the veins widely spaced, obscure or pronounced and with the central one normally the most pronounced; apex with a small, slightly thickened, beak-shaped, curved mucro which is deflexed (not erect) and commonly ±adnate to phyllode margin; gland inconspicuous, 0.5–2 mm above the vestigial pulvinus. Inflorescences simple; peduncles (3–) 5–10 (–16) mm long; spikes (0.8–) 1–3.5 cm long, sulphur yellow to golden. Flowers 5-merous; calyx gamosepalous, shortly dissected; petals with prominent midrib. Pods ±narrowly oblanceolate, sometimes very narrowly elliptic to linear, basally tapered, straight-sided, flat, 2–6 (–9) mm long, (4–) 5–6 (–8) mm wide, firmly crustaceous to ±woody, obliquely nerved, opening elastically from apex, with dehisced valves recurved; margins thickened and pale-coloured. Seeds oblique in distinct chambers, narrowly oblong-elliptic, 3–3.5 mm long, brown to dark brown; areole open, with pale halo; funicle-aril narrowly turbinate.

Grows in red, stony, gravelly, sandy, lateritic or skeletal soils or grey clay with lateritic deposits, in open eucalypt savannah woodland with grass (often spinifex) understorey, or shrubland with Terminalia and eucalypts, on ridges, escarpments or plains; sometimes forming dense thickets.