Name : Golden Barrel Cactus  
Information : Scientific Name: Echinocactus grusonii, Info: The stem of the golden barrel cactus serves as the plant's "barrel." For the purpose of storing water, the stem has developed to be spherical and swollen. Other cacti have thick stems to retain water, but the stems still keep the distinctive long, vertical stem morphology, which is a step beyond the stem adaption of the majority of other cacti.