Slender annual herb, sometimes with perennial rootstock; stems 10–60 cm long, subglabrous, pubescent or hirsute. Leaves with (2–) 3–5 (–6) pairs of leaflets, the lowest pair inserted well above stem; leaflets linear to narrowly ovate, oblique, 10–45 mm long, 0.5–1.5 (–3.5) mm wide, acute, sparsely ciliate, glabrous adaxially, sparsely pubescent abaxially; lower pairs spreading. Flowering pedicel 13–38 mm long, upright. Sepals 2–8.5 mm long, glabrous adaxially and abaxially or sparsely appressed-pubescent abaxially. Petals obovate, 3.5–16 mm long, yellow throughout. Extrastaminal glands 5; intrastaminal glands lacking. Stamens 10, 5 usually shorter, all fertile, or 1 or 2 with linear anthers, at maturity equal to stigma; filaments c. 2–4 mm long. Ovary 5-lobed, with moderately dense to dense white erect or appressed hairs; style (including stigma) (1.5–) 2–7 mm long. Fruit hispid, appressed-pubescent or subglabrous, of 1–5 tardily dissociating, fully developed cocci; pedicel 20–50 mm long, deflexed. Cocci 5–11 mm high, smooth or reticulate, unarmed or with pair of divergent basal spines dorsally, sometimes also with pair of medial spines.
Occurs in sand orsand/clay in a variety of habitats including tussock grassland, Eucalyptuswoodlands, levee banks and red sand interdune areas associated with spinifex.It is often recorded after fire.
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