Sometimes we look at something and it is so strange that our eyes cannot sort out what we are looking at. At these times, we either stop looking or try to apply some previous experience to explain what we see. This image is one of those unrecognizable images. I would guess that most people, nearly all, will something besides what is really here. Likely, they will see horsetail rushes, an aquatic plant. But this is cactus, an unfamiliar variety, but cactus none the less.