Shrub to small tree; twigs ribbed, sparsely to densely hairy. Lvs reduced to phyllodes, mostly verticillate; phyllodes ± glabrous or ciliate about veins and margins, linear to elliptic, usually slightly asymmetric, acute and long-mucronate, entire, 6-17 × (0.5)-1-3-(4) mm, with one prominent vein and often 1-2 less prominent veins; stipules linear to triangular, mucronate, 1-2 mm long, not always conspicuous in mature plants. Fls 4-merous, pale yellow, solitary but concentrated in axillary cylindric spikes; spikes > lvs. Pod sparsely hairy, becoming ± glabrous when mature, ± straight or slightly curved, 50-100 × 2-4 mm; aril folded, somewhat thickened at base of seed.