What kind of trees are these?

Hello, I found out about this kind of tree. It can grow both in the shade and in the sunlight and it also has blue blooms on it, or is it foliage, as well. As for this other kind of tree, it looks like any other tree but it also has the painful addition of thorns on its bark as well. Could anyone tell me what kinds of trees that those trees are, please? Thank you.