A Joshua tree is a hearty desert tree that indicates perseverance, resourcefulness, and taking care of yourself. They are generally good omens for a dream but also call attention to yourself and resting when you are over extending yourself.n this dream you may have... 1  Cut down a Joshua tree. 2  Seen a Joshua tree. 3  Seen a Joshua tree in a strange place-such as a desert. 4  Meditated and seen a Joshua tree.