aaw_015 December 20, 2018February 5, 2019 Matthew Caulkins, Web Applications Program Manager Previous Next M-20. Quercus alba Massachusetts (Jamaica Plain) Northern slope of the Homeopathic Hospital grounds, Louder’s Lane. Girth 12 1/2 ft. Photograph by E.H. Wilson, 1923. All photographs by Ernest Henry Wilson. Copyright © President and Fellows of Harvard College, Arnold Arboretum Archives; all rights reserved.