Does the saguaro cactuses have the longest needles?

Saguaro cacti do not have the longest needles among cacti. Their spines, which are actually modified leaves, can measure up to 3 inches long, but other species, such as the organ pipe cactus or certain species of the Ferocactus genus, can have longer spines. The saguaro is more notable for its impressive height and iconic shape rather than the length of its spines.