If you can imagine a saguaro cactus as a long neck, then the spines that cover it can be thought of as neck-lace. Intricate patterns woven together to create a delicate, almost jewel-like covering. Although, in the case of saguaros, this dainty lace is actually a formidable defense. Pretty to look at, especially close up, but completely unforgiving of even an accidental touch.