On June 8th I posted a picture of what I thought was Machairophyllum latifolium, I was led to believe that from the label on it from the greenhouse. My cursory examination didn’t catch it but luckily a reader by the screen name of Arizona Ed (or CactiEd, not sure. Email me!) did. I appreciate it.
It is in fact Rhombophyllum dolabriforme commonly known as Elkhorn Plant.
Thanks for the correction. I’ll try harder in the future.