Erect, spiny shrub, up to 0.5 m high. Stems erect, glabrous, with ascending branches. Spines secondary branches transformed into compound spines with many lateral spinules. Cladodes overlapping, filiform, apiculate, glaucous, 3-10 mm long, absent at anthesis. Flowers axillary, single or paired along short deciduous branchlets; pedicels articulated near middle. Flowering time Sept.-Nov. Fruit a nutlet.
Erect, glabrous shrub, up to 0.5 m high. Roots thick, terete. Stems erect, secondary branches terminating in spines. Cladodes in small fascicles evenly spaced along innocuous, deciduous branchlets, usually secund on spreading branchlets, absent at anthesis. Flowers: many, fascicled on reduced branchlets; tepals greenish. Fruit a nutlet.