Root-bark yellow brown fissured. Bark along base of trunk roughly longitudinally fissured dark grey, underside grey to brown, becoming longitudinally fissured and dark grey to grey higher up the trunk with the underside light brown. Main branches bark greenish grey to grey, smooth, often with persistent scattered prickles. Stem bark light brown with lenticels, finely latitudinal fissured, underside grey. Young branches glabrous to sparingly hairy. Wood soft quickly devoured by insect. Stipules not spinescent, up to 2.5 mm long, deciduous. Prickles in pairs below the nodes, thorns recurved, horn brown, occasionally light yellow brown at the apex, up to 9 mm long, leaves 1-2 clumped above the thorns, petiole (8.1-)12.2-21.0(-22.3) mm long, with a gland 1/3-1/2 up the petiole; rachis (17.6-)22.5-38.0(-42.1) mm long, sparingly hairy, lime green in colour, gland at the junction of the top 1-3 pinna pairs. Pinna (3.0-)4.4-6.1(-6.0) pairs per leaflet, (18.2-)19.7-26.1(-27.2) mm long, sparingly hairy, lime green in colour. leaflets (6.0-)7.3-10.0(-11.0) pairs per pinna, (1.4-)1.7-2.2(-2.4) x (5.0-)6.0-7.6(-7.7) mm, linear to linear-oblong, base asymmetric, apex light green above grey green below, with 1-3 veins from the base, secondary and tertiary venation not visibly in fresh material, margins entire fringed lime green. Inflorescence spicate, produced with the leaves; spike (28.7-)28.9-35.7(-36.9) mm, white yellow; peduncles 5.8-11.6 mm long. Flowers sessile; calyx pubescent, lime green tinged reddish, tube (0.90-)1.23 x 1.65(-1.67) mm long, lobes (0.76-)0.82 x 1.14(-1.30) mm long; corolla lime green, tube (1.62-)1.64-2.22(-2.33) mm long, shorter than calyx, lobes (0.95-)0.98-1.55(-1.74) mm long; stamen filament free (4.60-)4.85-5.45(-5.50) mm long; anthers 0.14-0.15 mm across; ovary (0.97-)1.06-1.32(-1.43) x (0.29-)0.31-0.39(-0.40) mm glabrous; stipe 0.48-0.64 mm long. Pods reddish brown, (43.0-)69.6-140.6(-154.0) x (10.3-)12.9-19.1(-21.0) mm, (2-)7-8(-10.0) seeded, straight, linear, dehiscent, coriaceous, base acuminate to mucronate. Seeds brown to olive green, (8.6-)9.5-10.9(-11.6) x (7.5-)8.0-9.5(-10.0) mm, sub-circular, central areole (3.5-)4.2-5.3(-5.8) x (2.9-)3.8-4.7(-4.9) mm.