Leaves 0-6-2-5 x 0-15-0-7 cm., spathulate or oblong-spathulate to elliptic or oblong-elliptic, obtuse or nearly so at the apex, the narrowest ones nearly acute, entire, narrowing towards a subpetiolar base or rarely contracted below, slightly connate, flat, neither lineolate nor pellucid-punctate, dark green and membranous or nearly translucent on drying.
Stems up to 17(28) cm. long, procumbent, subdichotomously branched, rigid and sometimes subligneous towards the base, rooting at the lower nodes; branches up to 18 cm. long, prostrate, ascending or erect, slender, herbaceous and rather leafy towards the extremity; lower internodes up to 3-5 cm. long, the others successively shorter.
Flowers 5-merous, solitary and axillary usually all along the stem and branches; pedicels capillary, 7-40 mm. long.
Calyx 1-25-2 mm. long, up to half as long as corolla; sepals oblong-linear, obtuse, slightly connate at the base.
Stamens more than half as long as corolla; filaments 2-2·25 mm. long; anthers c. 0·25 mm. long, yellow.
Corolla 3·5-4 mm. long, white; petals 1·5-2 mm. broad, oblong-elliptic or obovate, concave, suberect.
An annual (or also perennial), diffuse, somewhat fleshy, completely glabrous herb.
Follicles 2-2·5 mm. long, tapering into the c. 1 mm. long styles.
Seeds 0·3-0·4 mm., longitudinally lineolate-ribbed.