Kroenleinia grusoniiKroenleinia grusonii Kroenleinia grusonii is the golden barrel cactus, a Mexican species with a rounded, ribbed body and dense golden yellow spines. Young plants remain small and symmetrical for a long time, gradually building the strong spherical outline associated with mature specimens. The rib structure, pale wool at the crown and bright spine colour make it a clear focal plant in a sunny cactus collection. Strong light, mineral substrate and