Hi, I don't know if this is possible, but can a tiny cactus be IDd at 1.5 cm (app half an inch) in height? I sowed a packet of seeds some time ago, about a dozen sprouted and only one survived. I am not sure if an ID can be even guessed at when it is this small. There are actually two trunks, but one of them is hidden in this shot. If anyone would like to have a go I would be pleased to photograph it from other angles if needed.