This is a popular, waterwise garden plant, especially when planted en masse as a ground cover, or in rock gardens. It is also cultivated for its medicinal properties.
It is a fast growing, branched, succulent perennial with fleshy, linear green leaves in opposite rows and clasping the stems at the base. It forms spreading clumps with greyish stems often bearing adventitious roots. The small 6-petaled star shaped flowers are carried on an upright, spreading raceme during spring (or occasionally at other times). The petals are either yellow or sometimes orange, which combines attractively with the fluffy yellow stamens to give a bi-coloured look. The fruit is a small, rounded capsule and contains black seeds which are dispersed by wind. The plants are very variable in leaf length.