Erect annual to short-lived perennial herb, 0.15–0.7 m high, with taproot; young stems terete, dull green, strigose, with moderately dense, appressed, equally biramous hairs. Leaves simple; stipules narrow-triangular, 0.3–1 mm long, glabrescent or sparsely pubescent, not persistent; petiole 0.5–1 mm long; multicellular hairs absent to sparse in the leaf and stipule axils, inconspicuous, red, club-shaped. Lamina linear, (10–) 20–45 mm long, 0.3–1 mm wide, the surface furrowed or margins in-rolled; upper surface dull green with sparse, appressed (rarely shortly spreading) hairs; lower surface dull green with sparse, appressed hairs; apex acute; veins not prominent. Inflorescence (5–) 15–35 (–55) mm long, shorter or rarely longer than leaf; peduncle 3–15 mm long; bracts triangular; 0.5–0.7 mm long; flowers pink to purple, pedicel 0.5–1.5 mm long. Calyx (1.3–) 1.5 (–1.8) mm long, with subequal lobes equal to or longer than the length of the tube and moderately dense, grey, appressed hairs. Standard pink, obovate to orbicular, 3–3.2 mm high, 2.8–3 mm wide. Wings spathulate to narrowly obovate, 2.8–3.3 mm long, 1.1–1.3 mm wide. Keel 3.3–3.5 mm long, 1.3–1.5 mm deep, with lateral pockets 0.3–0.4 mm long, acute apex; hairs moderately dense, hyaline, at the tip and along the bottom. Staminal tube 1.8–3.2 mm long, colourless. Ovary glabrous. Pods ascending to spreading, terete, 15–30 mm long, 2–3 mm deep, brown, glabrous; apex shortly pointed; endocarp spotted; seeds (5–) 8 (–10) per fruit.
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