A. fissuratus is a geophyte plant that produces a star-shaped rosette of fleshy, deltoid to hemispheric tubercles, which have no spines and lie almost flat on the soil surface. The tubercles, about as long as wide, are closely packed and form a coarse mosaic. Exposed faces of tubercles, deeply fissured on either side of the central areolar groove, are coarsely rugose, and are often sharply angled apically; and with a lateral longitudinal furrow on each side of the tubercle, along the edge. The areoles are up to 3 mm wide, sometimes confined to middle of tubercle faces instead of extending to tips. They are usually solitary, rarely giving rise to side shoots from old areoles, they grow extremely slowly, to 20 cm in diameter.
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