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Please I would like to know what is the difference among the cactaceas, suculents an other ones that I don't remember the names now. Thank you. Haydée Lucía.
cactus spines are different than the spines on all other succulents and arise from structures that do nothing but form spines. Spines on succulents tend to arise from the same tissues the rest of the plant is made of. Most cacti have clusters of spines (not all of course, and some have no spines) while most succulents have solitary or paired spines. Cacti also tend to have large, colorful flowers, while most succulents (like the Euphorbias) have insignificant flowers. Most cacti are from the New world (north and south america) while succulents are from all over the world (most large Euphorbias are from the old world- Africa and Asia). Hope that helps some.