Sorry AgaveGirl1,
mutiny is not my intention. Please don't misunderstand.
Over 30 years long I had run a cactus nursery in Germany. Visited Mexico and USA several times to study the plants in their environment. Had thousands of F. wislizenii seedlings in my nursery. And big plants as well, grown up in southern European countries. And in my opinion the depicted plant really looks closest to that species. Therefore i chimed in that discussion.