Brittle, stiffly erect shrublet, up to 300 mm tall, with opposite lateral branches and pustulate branches from base. Leaves densely whorled, terete, bristle-tipped, stipules filiform, membranous. Flowers in small axillary clusters, white and green. Fruit top-shaped, minutely pitted.
Divaricately branched shrublet to 30 cm, with stiffly erect, brittle, pustulate branches from base. Leaves whorled, terete, apiculate. Flowers in small, axillary clusters, white and green. Fruits top-shaped, minutely pitted.