In my country there is a tree called Quebrahacho Pithecellobium dumoson, it is ideal to make bonsai, here in my country they collect it a lot to work it and realize this beautiful art, just as you work it also has thorns, and it is not easy because you prick yourself when you least think , but they are ideal trees to practice this art, this week I went to a bonsai exhibition and exhibited a bonsai tree of this really amazing kind, I leave the link so you can appreciate it, it was one of the largest in the sample.
https://steemit.com/art/@gensequini/bonsai-exhibition-trees-in-miniature-an-art-created-and-shaped-by-their-teachers