Slender annual herb, 1.5–4.5 cm high. Leaves flat and thread-like, 0.5–2.5 cm long, shorter than to almost as long as the infructescence. Scape at fruiting erect or ascending, (0.8–)1.5–3.5 cm long; infructescence (0.3–)0.5–1.8(–2.4) cm long, with (4–)7–13 fruits. Fruits narrowly pyramidal to suboblong, 1.3–1.8(–2.2) mm long, 0.4–0.5(–0.7) mm wide just above base; pedicel 0.1–0.2 mm long; carpels 6, 3 fertile carpels alternating with 3 undeveloped sterile ones; fertile carpels flat to slightly convex dorsally when dry, at base with 2 minute lateral obtuse points up to c. 0.1 mm long. Fruits Aug.–Nov.
MuM, Wim, VVP, GipP, OtP, WaP, WPro. Also WA, SA, Tas. Scattered on damp saline soils near salt-lakes, and forming part of herbfield in coastal saltmarshes.