But to botanists, there is no rose with thorns: The spiky outgrowths of a rose stem are called "prickles," and are biologically distinct from the stiff, woody thorns of other plants. Prickles are ...
3 Tell them to sort the plants into those with prickles and thorns, and those without. They should carefully take the non-prickly plants out of their pots and plant them into their bowl.