Nice spines and surface relief textures on a Cylindropuntia cactus, also known as cholla. I've experienced first hand how sharp those spines are and how difficult, painful as well, it is to extricate them!
Fav! I love cacti and this is a beautiful shot with the light on the spikes and the contrasting background. My son fell against one of these when he was 2 years old :(
Becasue how easy they attach to a passing body, the term "jumping cholla" has also been used.
What a great find. I thought those were toothpicks. :-)