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I would like to know what variety of cactus this is. It has grown three times its height since I bought it and although I have looked on many websites, I just cannot seem to find anything like it.
I believe it's a Consolea rubescens. AKA Opuntia rubescens. Common name is "Roadkill cactus".
It will eventually grow into a large tree, so give it a lot of space. The green and brown cactus in front is Tephrocactus geometrizans
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