When I last toured George Washington’s Mount Vernon estate, I was astonished to see and touch a tree that the father of our country planted himself (well, I’m not certain he did the actual shovelling, but…). You’ll find photographs of that tree and other trees of historic significance in these two worthy coffee table books: “America’s Famous and Historic Trees: From George Washington’s Tulip Poplar to Elvis Presley’s Pin Oak,” by Jeffrey G. Meyer and Sharon Linnea, and “Remarkable Trees of the World” by Thomas Pakenham.