I got this cactus from a friend, but I am not sure if it is really a cactus. It could also be a succulent other than cacti. Does anyone know what species this is?

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  • All cacti are succulents (i.e. they store water in the plant and/or in the roots) but not all succulents are cacti. In common usage "succulent" usually means "succulent but not a cactus". Your plant IS a cactus, but I don't recognize the species.
    – alephzero
    Dec 26 '18 at 22:53
  • Thanks for explaining the difference, @alephzero, you must think I am a newbie. No problem. How do you know it is a cactus? And not a succulent such as Euphorbia? Can you explain how you see that difference?
    – benn
    Dec 27 '18 at 9:09
  • Definitely not a cactus, I think it's a Euphorbia of some sort. It doesn't have areoles on each tubercle, which cactus most definitely have.
    – Tim Nevins
    Dec 27 '18 at 13:22
  • @TimNevins, alright so the areoles is something cacti really must have. Thanks for the tip.
    – benn
    Dec 27 '18 at 15:37
  • 1
    Thanks for the effort @TimNevins, it's a plant I have never seen before either. My guess is a Euphorbia, that genus has so many strange looking members...
    – benn
    Dec 31 '18 at 20:41

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