Annual herb to 30 cm high. Stems with scattered, sparse antrorse to divaricate hairs. Leaves alternate, linear, linear-lanceolate or ovate-elliptic, 12–80 mm long, 2–8 mm wide, glabrescent or pubescent with antrorse hairs, margin entire or occasionally few-toothed, recurved, venation obscure; stipules linear, appressed, to 1 mm long, margin ciliate. Flowers on filiform peduncles 3–13 mm long; pedicel 2–4.5 mm long; bracts triangular. Sepals lanceolate-ovate, 2.5–4.5 mm long, carinate, glabrous or with scattered hairs. Petals orange to yellow, the anterior spathulate, 10–14 mm long, 5–9.5 mm wide, 2 posterior petals linear-oblong, 3–4 mm long; lateral pair lanceolate-falcate, 4.5–5.5 mm long. Anterior 2 filaments with penicillate nectaries. Capsule 5.5–7.5 mm long. Seeds 5–10, ribbed, pitted between ribs, cream.
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