Erect, glabrous, spiny, glaucous shrublets ±1 m high, evergreen. Rhizome typical, hard, woody, with tubers on side roots. Stems ribbed when young, becoming smooth with age. Spines sharp, exserted, ±10 mm long, present below branches and cladode fascicles. Branches close together, axils multibudded, bearing branchlets and racemes. Cladodes 25-102 mm a fascicle, triangular in cross-section, ±(10-)15-20 x 1-2 mm, smooth, apiculate. Racemes simple, 50-80 mm long, closely beset with solitary flowers on short, persistent stalks and bracts, subtended by small spines; tepals narrowly obovate, ±3 mm long. Stamens with thin filaments and yellow anthers. Ovary with ±6 ovules in each locule; globose. Berry ±10 mm in diameter, red.
Erect or twining, spiny shrublet, up to 1 m high. Stems ribbed when young, becoming smooth with age, glabrous. Spines sharp, exserted, ± 10 mm long, present below branches and cladode fascicles. Cladodes 1-4 per fascicle, triangular in cross section, smooth, apiculate, 15-20 x 1-2 mm. Flowers in simple racemes; stamens with yellow anthers; pedicels short. Flowering time Apr., May. Fruit a red berry.
Like A. confertus but cladodes 150-200 mm long.