Prostrate herb, becoming glabrous; stems 15–35 cm long. Leaves in unequal pairs or alternate, with 5–7 pairs of leaflets; petiole 3–10 mm long; leaflets narrowly elliptic or narrowly obovate, 5.5–11 mm long, 1.5–3.8 mm wide, obliquely rounded at base, shortly acuminate, sparsely appressed-pilose adaxially, glabrous abaxially. Flowering pedicel 8.5–14 mm long, upright. Sepals 5.7–9 mm long, glabrous adaxially except for pubescent apices, sparsely appressed-pilose abaxially. Petals elliptic or obovate, 6.5–10 (–11.5) mm long, glabrous. Stamens 10, all fertile; filaments 5.5–6 mm long. Ovary densely white-pubescent; ovules ?3 per cell; style (including stigma) 2.3–2.8 (–5.5) mm long in flower; stigma (0.7–) 0.9–1.0 mm long. Fruit globose, 5-winged, 15–22 mm high, 18–26 mm wide, sparsely pubescent, dorsally with a single 3.5–4 mm long spine medially or below either side of midrib between each of the wings, eventually dissociating into five 2-winged cocci; fruiting pedicel 11–35 mm long.
Found in red sand, usuallyin mulga with Aristida, Plechtrachne or Triodia, sometimes thesand over limestone.
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