Annual, much-branched and glaberous herb up to 20-50 cm in height. Leaves are simple, small between 0.5 and 25 mm, sessile, opposite, cylindric and fleshy. Blooming in early winter, flowers are axillary, mainly solitary but occasionaly in pairs, 5 mm in diameter with 5 sepals, 5 petals and 10 stamens. They are supported by short peduncules (2-4 mm). Fruits are capsules deeply 5-lobed obovoid and 2 to 3 mm long.