Dioecious, much-branched, succulent shrub, 5-50 cm, sometimes with tuberous rootstock; stems very slender, erect, greyish, often roughened, 2-4 mm diam., often slightly ridged. Leaves opposite, ± sessile, triangular, 1-3 mm long. Cyathia 2-3 mm diam., glands ± entire, greenish yellow.