Annuals, usually 1–2-stemmed, 8–17 (–25) cm. Basal leaves several, to 12 cm long, 1.2–2.8 mm wide. Cauline leaves 2–4, to 10 cm long, to c. 2.5–3.0 mm wide; margins ±smooth, sparsely hairy, with hairs long, especially near sheath mouth; apex acute, usually ±extended to a single or sometimes two hairs. Inflorescence bract herbaceous, c. 2–4 cm long, surrounding pseudorhachis; middle bracts purplish-membranous with scarious ciliate margins. Bracteoles purplish-membranous, ovate, acuminate, c. 2.0–2.5 mm long. Inflorescence a loose divaricate panicle usually 5–13 cm long, almost evenly branched or distally denser; branches thin, smooth; flowers borne singly. Tepals ±equal or outer slightly longer, ±ovate, with outer tepals purplish with decreasing colour intensity towards membranous margins, (2.4–) 2.7–2.9 (–3.2) mm long, acute and mucronate; midrib usually distinctly papillose near apex; inner tepals wholly translucent-membranous or midrib purplish; apex usually emarginate and mucronate. Stamens 6; anthers 0.3–0.5 mm long; filaments 0.4–0.8 mm long; style 0.2–0.3 mm long; stigmas 0.3–0.5 mm long, not exserted. Capsule ovoid-subglobose, pale brown to pale purplish, thin-walled, ±acute to subobtuse; segments 1.4–1.8 mm long, c. 1.3–1.5 mm wide; mucro short. Seeds subglobular 0.8–0.9 × 0.6–0.7 mm long, smooth, shining, pale castaneous-brown; appendage absent. 2n=6, fide N.Malheiros & D.Castro, Nature 160: 156 (1947); H.Nordenskiöld, Hereditas 37: 327 (1951).