In his classic book Mormon Country, author Wallace Stegner noted that nineteenth century Mormons planted rows of Lombardy poplar trees wherever they established settlements in the territory that is now Utah. The trees served as windbreaks and boundary markers, but they were also the flags that marked the advance of Mormon civilization in a hostile territory. In my hometown and lots of other towns all over the United States elm trees served a similar function, marking the spread of middle class residential neighborhoods during the end of the nineteenth and the first third of the twentieth centuries. In the 1960’s almost all of those tall elegant trees fell prey to Dutch Elm Disease, making each municipality a little poorer.