Fls in a terminal complex "spike" within glume-like bracts. Bracts (2)–3, distinctly alternate, 1–2 bracts empty. Pseudanthia 1 always in the basal bract, 1 also in the middle bract in G. setacea. ♂, 2 in each pseudanthium; anthers 1-celled. ♀, 2 in each pseudanthium, collateral, connate or completely fused. Fr. dehiscing along the outer side of each carpel, or dehiscing loculicidally with 2 valves in G. australis. Perennial herbs, densely tufted and forming cushions. Stems much-branched, lfy throughout. Lvs ∞, densely imbricate, dilated at the base to a broad membr. sheath, slightly ligulate. Three spp. Type sp.: G. australis Gaud. from Falkland Is and Tierra del Fuego. Otherwise known only from N.Z., Tasmania and New Guinea.