Perhaps yet another variant of A. pinnatifida, but having longpetioled leaves and if anything even neater and more attractive appearance. The foliage varies from almost glabrous to silky-hairy, but again is always more evident on the lower surfaces. Leaves 8-40mm long and not exceeding 7mm in width, the eleven to nineteen leaflets close-set and deeply lobed. Fruiting spikes attenuated and usually interrupted, often with well-separated lower subsidiary fruitlets, which are hard, smallish and covered in broad-based barbed spines. Argentina and Chile; from 3000m in the central cordilleras to sea-level in Tierra del Fuego.