Washington, D.C.
Elms of the National MalllearnSite Addresses Botanic Garden “Elm” Jefferson American Elm Online Resources SelecTree: A Tree Selection Guide. The Urban Forest Ecosystems Institute. Silvics of North America. United States Department of Agriculture Forest Service Agriculture Handbook. “Ulmus Americana: American Elm.” By Edward F. Gilman and Dennis G. Watson. University of Florida: Institute of Food and Agricultural Sciences, November 1993.
Print Resources“A Dutch Elm Disease Resistant Triploid Elm,” Canadian Journal of Forest Research Vol. 24 No. 4 1994. By James L. Sherald, et al. “Disease-resistant American Elm to Return to the National Mall,” NPS Natural Resource Year in Review 2005. By James L. Sherald. Knowing Your Trees. By G. H. Collingwood and Warren D. Brush. Edited by Devereux Butcher. The American Forestry Association, 1964. National Mall and Memorial Parks: Union Square, National Park Service Cultural Landscape Inventory. By Kay Fanning. National Park Service, Draft of March 2006. |
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