Scirpus inundatus (R.Br.) Poir.
Tufted. Stems rather rigid, 6-30- (50) cm high. Leaves 1- (3) or reduced to red-brown basal sheaths. Inflorescence a cluster of (1) -3-6- (10) spikelets, often proliferous. Glumes obtuse, flattened towards tip. Stamen 1. Style-branches 3. Nut distinctly trigonous, usually white.
N., S. Nelson; Westland; rare elsewhere. St., Ch. Damp ground; lowland to montane. (Australia, Norfolk Id, Malaysia, S. America)