Saguaro Cactus was added with the Badlands makeover.
It is found throughout the Badlands biomes as a natural plant.
Like regular Cactus, any entity touching the block will be damaged.
Barrel Cactus can be used as food for Camels.
A single Saguaro Cactus block will naturally grow (or via bonemealing) into a full-sized Saguaro Cactus plant.