The Barrel Cacti (Ferocactus wislizenii) are always cylindrical or barrel shaped and are among the largest cacti of the North American deserts. They have prominant ribs and are fiercely armed with heavy spines. The Mixed Barrel Seed Packet includes a mixture of Red Fish Hook and Candy Barrel cactus seeds. Purchase your Barrel Cacti seed packet today from Desert Gatherings. $1.55.