Cereus pachyrrhizusCereus pachyrrhizus is a species of plant in the genus Cereus.DescriptionCereus pachyrrhizus is a tree-like cactus, growing up to tall. The stems are around wide and usually have 6 ribs. The stem also have areoles, each bearing 10-13 spines. The flowers are white and showy and fruits dry up when ripe.DistributionCereus pachyrrhizus is native to the seasonally dry deserts of Paraguay.