Welcome to our A to Z list for common names. You will notice some common names have more than one scientific name link next to it. Why is that? Common names can vary greatly region to region. Balsam fir, for example, refers to Abies balsamea in the eastern half of North America, but out west it may refer to Abies grandis. So how do you find the tree you're looking for? Each scientific name is linked to a unique species page with pictures and distribution maps, which could be used in identification or to determine which of the species listed here is native to your area.