Hairy Cactus, often referred to as the Old Man Cactus (Cephalocereus senilis), is a striking and distinctive species of cactus native to Mexico. It is well-known for its long, white, hair-like spines that give the plant its “hairy” appearance, making it look like an old man with a long, bushy beard. It’s a slow-growing cactus that can reach impressive heights, and it’s a popular choice for collectors and plant enthusiasts.