aaw_042 December 20, 2018February 5, 2019 Matthew Caulkins, Web Applications Program Manager Previous Next M-63. Ulmus americana Massachusetts (Palmer). Washington El. Height 55 ft., girth of trunk 19 ft., spread of branches 95 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.