aaw_043 December 20, 2018February 5, 2019 Matthew Caulkins, Web Applications Program Manager Previous Next M-64. Ulmus americana Massachusetts (Palmer). Washington Elm. Height 55 ft., girth of trunk 19 ft. Photograph by E.H. Wilson, May 3, 1923. All photographs by Ernest Henry Wilson. Copyright © President and Fellows of Harvard College, Arnold Arboretum Archives; all rights reserved.