OrchidBob said:looks like you have three different plants there.
The Euphorbia trigone is the green one.
The red leaf one is Euphorbia trigone "rubra"
and the bigger stem (leaning one) looks like a Euphorbia lactea.
Actually there are 2 lacteas and 1 trigona, I think... the trigona is the one with the red leaves.
The best way to tell lactea from trigona is to look at the direction of the branches. If some of them (not necessarily all) run sideways and away from the main stem in a spreading fashion, it's lactea (left and right boxes in the picture). If they all run parallel to the main stem, close up next to it, it's trigona.
I used to have a trigona on the patio for a while before it became a small bush and graduated to the ground. It had brown spots and scars and was far from perfect or pretty. I would rotate it 180° every 2 weeks or so. The brown spots didn't really bother me since there was no rot anywhere,
I would expect trigona to have more branches than your red-leafed plant does, but that might be a function of various things like competition with the other stems in the soil.
