Annual herb to 20 cm tall; roots adventitious. Leaves mostly basal, ascending, linear-oblanceolate, ±entire, glabrous; lamina 2.5-10 cm long, 2-5 mm wide. Flowers in loose, terminal thyrses or racemes to 15 cm long; bracts linear, to 15 mm long; peduncle 4-10 mm long; bracteoles linear, to 1.5 mm long; pedicel 5-7 mm long. Sepals lanceolate, c. 1 mm long. Corolla 2-3 mm long, without enations, auricles indistinct; abaxial lobes 0.5 mm long; wings absent or very narrow. Indusium square, c. 0.5 mm long, ±flat. Ovules many, scattered. Fruit subglobular, c. 3 mm diam.; valves entire. Seeds yellowish.