Small annual herb, (2–)2.5–6(–9) cm high. Leaves flat and thread-like, 2–5(–7.5) cm long, usually shorter than or almost as long as infructescence. Scape at fruiting erect, ascending or spreading, (1.2–)3–7 cm long; infructescence (0.1–)0.4–0.9(–1.5) cm long, with (1–)3–6(–15) fruits. Fruits inverted-pyramidal, 1.7–2.5 mm long, 1.5–2.2 mm wide (excluding spreading points), subsessile (pedicel up to 0.2 mm long); carpels 6, free distally, 3 fertile carpels alternating with 3 undeveloped sterile ones; fertile carpels concave to slightly convex dorsally when dry, distally truncate with 1 median spreading point c. 1 mm long; sterile carpels with a conspicuous erect to spreading point. Fruits Sep.–Nov.
LoM, MuM, Wim, Brid, VVP, GipP, OtP, GGr, DunT. Also WA, SA, Tas. Occurs in herbfields on damp saline soils of salt-flats and coastal saltmarshes.
