Human: Is there a way to tell what kind of tree a leaf came from? Assistant: 
Yes, there is. There are many different species of trees in the world and each one has its own distinct set of characteristics. You can look at a leaf closely to see if it has any distinctive features that indicate which type of tree it may have come from. For example, leaves from some trees will often be smooth or hairy while others may have a pointed tip, a waxy coating, or other distinguishing features.