Opinion Likes ?

This is such a pretty plant/tree, but it is also puzzling because sometimes it has thorns, sometimes it has spines, and sometimes it has neither. My neighbor has a very large tree that generously dumps exploding seeds into my yard. I don't mind and the birds seem to like them. I decided to let one grow to provide some filtered sun for the smaller plants but this one has spines, so now i am planting all of the seeds that i find to see if i can grow one that has neither spines or thorns. If not, i'll take a look at some nurseries to see what they have.