Euphorbia horrida f. monster (Monstrous)

It's a slow-growing succulent plant, easily recognizable for its particular monstrous shape, which makes it unique in its kind and highly appreciated by green collectors. Its green stem has multiple elongated tubercles and irregularly shaped ribs, framed by stiff brownish spines. Flowering occurs in summer, blooming at the apex of the plant with small yellow to green flowers.