An ecological landscaping tool for Mass. homeowners by MA Executive Office of Environmental Affairs (.PDF, 1.4MB)

Information on invasive plants as prepared by Mehrhoff, L. J., J. A. Silander, Jr., S. A. Leicht, E. S. Mosher and N. M. Tabak. 2003.
IPANE: Invasive Plant Atlas of New England. Department of Ecology & Evolutionary Biology, University of Connecticut, Storrs, CT, USA.