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Pointy little barbs where stem branches off?

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High All! Can anyone tell me what the tiny little points are everywhere there is a fork on a plant?? The plant was given to me by a friend and I think it's one he cloned. It's about 8-10 inches high and every place a branch Y's off there is a little 1/8 inch point? I'm doing my first grow and have no clue what this is. Thanks! :peace: