Cereus gerardi is a species of "Cereus" native to the state Tocantins in Brazil 
Description.
"Cereus gerardi" has erect stems up to 3 meters talks; The stems are greenish-blue and have many ribs. 2-3 Central spines are seen and 5-9 are counted for radial spines. Central spines are yellow in color. These cactus clusters at the base, forming a bushy mass of long stems. The tubular flowers are cream colored. Fruits are circular to egg shaped, spliting open when ripe.