Cephalocereus senilis

The Cephalocereus senilis, commonly known as the Old Man Cactus, is a distinctive columnar cactus species noted for its long, white, hair-like spines that give it a unique, woolly appearance. This slow-growing cactus can reach impressive heights of up to 15 meters in its native habitat in Mexico. The hair-like spines not only give the plant its name but also protect it from the intense sun and help retain moisture. Beneath the white "hair," the green stem is ribbed and can occasionally produce small, tubular, pink or yellow flowers at the top when the plant is mature.