aaw_001 December 20, 2018February 5, 2019 Matthew Caulkins, Web Applications Program Manager Previous Next M-1. Ulmus americana Massachusetts. Side of main road between Groton and Townsend. Tree 90 ft. tall, girth of trunk 15 ft. Photograph by E.H. Wilson, October 12, 1923. All photographs by Ernest Henry Wilson. Copyright © President and Fellows of Harvard College, Arnold Arboretum Archives; all rights reserved.