Shrub 0.3–2 m high. Branchlets glabrous or with minute straight appressed hairs commonly restricted to phyllode axils. Stipules caducous or persistent. Phyllodes variable, frequently linear to oblanceolate, straight to incurved or recurved, flat to subterete or obtusely pentagonal, 1.5–5.5 (–6) cm long, 1–8 mm wide, acute to obtuse, mucronate or apiculate, coriaceous, green to grey-green, sometimes glaucescent in subsp. angustifolia, glabrous but pulvinus mostly appressed-puberulous adaxially, 5-veined in all, prominently 1-veined per face when flat; adaxial margin with 2 veins coalescing above the gland commonly in basal ⅓–½ of phyllode but sometimes free to apex; gland 1–15 mm above pulvinus. Inflorescences rudimentary normally 2-headed racemes, with axes rhynchophylla) slightly or not at all constricted between seeds, curved to once-coiled, ±terete, to 7 cm long, 2–3 mm wide, thinly coriaceous, black, glabrous or sparsely strigulose. Seeds (not seen for subsp. angustifolia or rhynchophylla) longitudinal, oblong, 3–4 mm long, shiny, black; aril terminal, conical, white or dull yellow.
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