Are-bore-eat’em. Not sure why this word trips me up. But then again, a lot of words trip me up. If you’re unfamiliar with the meaning of Arboretum, it’s a botanical garden that specializes in trees and shrubs exclusively. In the case of the U.S. National Arboretum, there are plenty of types of trees, like apples, maples, and dogwoods, but, hands down, the highlight is the Azalea Collection.