HABIT	A PROSTRATE OR PROCUMBENT, ANNUAL OR PERENNIAL HERB.
STEMS	THE STEMS ARE GENERALLY PROSTRATE, 0.2-1 M HIGH, WITH STRONG CREEPING TAP ROOTS, OFTEN ROOTING AT THE NODES, SOMETIMES FLOATING, CREEPING OR ASCENDING AT THE TIPS, CYLINDRICAL AND SLIGHTLY HAIRY, WITH NUMEROUS ERECT BRANCHES.
LEAVES	SIMPLE, OPPOSITE, SHORTLY PETIOLATE OR SESSILE, BROADLY LANCEOLATE OR SPATULATE TO ALMOST LINEAR, 0.6-5 CM LONG, AND 0.3-1 CM WIDE. THEY ARE ATTENUATED AT THE BASE, AND THE APEX IS ACUTE TO BLUNT, WITH ENTIRE, GLABROUS OR PILOSE MARGINS.
FLOWERS	FLOWERS INCONSPICUOUS, WHITE, BORNE IN SMALL, AXILLARY, DENSE, SESSILE, SILVERY-WHITE CLUSTERS OF COMPRESSED SPIKES.
FRUITS	UTRICLE CORDIFORM AND STRONGLY COMPRESSED.
SEEDS	DARK-BROWN TO BLACK, DISC-SHAPED AND SHINY, ABOUT 0.8-1 MM IN DIAMETER.