Description: Erect rhizomatous perennial herbs.
Leaves spongy, inflated.
Inflorescence spicate. Flowers bisexual, 2-merous. Flower structure variously interpreted, either as having 2 perianth segments or these treated as 2 bracts. Stamens (i) 12 and each 2-locular, or (ii) these treated as the outer 6 being perianth segments and the inner 6 being stamens, or (iii) 12 1-locular stamens fused in pairs; all 12 produce pollen and dehisce extrorsely, thus favouring the first interpretation. Carpels usually 4, fused almost to the apex.
Individual fruit dehiscing and remaining fused to central axis.
Distribution and occurrence: World: 1 species, endemic Australia. Australia: 1 species, endemic.
Text by S. W. L. Jacobs