My grandpa has two types of cacti we are looking to identify. I have already posted about the discoloration but I thought identification would also help me get to the root of the problem.
(Left to right, top to bottom) #1. Left: Probably an Echinocactus grusonii that has grown cylindrical instead of globose. Right: Some kind of Euphorbia (not a cactus). #2. The Euphorbia again. #3. Definitely a cactus, but I cannot say exactly what it is. Cereus? Pilosocereus? Is it as blueish as in the photos?
