Field Guides and Non-technical Identification:
Brown, Lauren. 1979. Grasses: An Identification Guide. Houghton Mifflin Co.
Cogg, Boughton. 1956. A Field Guide to the Ferns and Their Related Families of Northeastern and Central
    North America. Peterson Field Guides, Houghton Mifflin.
Newcomb, Lawrence. 1977. Newcomb's Wildflower Guide. Little, Brown and Co.
Symonds, George W. D. 1958. The Tree Identification Book. Quill.
Symonds, George W. D. 1963. The Shrub Identification Book. Quill.

Technical identification:
Gleason, Henry A. and Arthur Cronquist. 1991. Manual of Vascular Plants of Northeastern United States
    and Adjacent Canada, Second Edition. The New York Botanical Garden.
Harris, James G. and Melinda Woolf Harris. 1994. Plant Identification Terminology, An Illustrated Glossary.
    Spring Lake Publishing.
Holgren, Noel H. 1998. The Illustrated Companion to Gleason and Cronquist's Manual: Illustrations of
    the Vascular Plants of Northeastern United States and Adjacent Canada. The New York Botanical Garden.

Natural History and Habitat Guides:
Appalachian Mountain Club:  Mountain Flowers of New England.  Boston, MA.
Johnson, Charles W. 1980. The Nature of Vermont: Introduction and Guide to a New England Environment.
    The University Press of New England.
Johnson, Charles W. 1985. Bogs of the Northeast. The University Press of New England.
Steele, Frederic L.  1982.  At Timberline:  A Nature Guide to the Mountains of the Northeast.  Illustrations by
    Arlene Soule, Cindy House, Robin Brickman.  Boston, Massachusetts.
Thompson, Elizabeth H. and Eric R. Sorenson. 2000. Wetland, Woodland, Wildland: A Guide to the
    Natural Communities of Vermont.Vermont Department of Fish and Wildlife and The Nature Conservancy,
    distributed by University Press o f New England.
Wessels, Tom. 1997. Reading the Forested Landscape: A Natural History of New England. The Countryman Press.

Landscaping and Gardening with Native Plants:
Callina, William. 2000. The New England Wild Flower Society Guide to Growing and Propagating Wildflowers
    of the United States and Canada. Houghton Mifflin.
Hightshoe, Gary L. 1988. Native Trees, Shrubs, and Vines for Urban and Rural America: A Planting Design
    Manual for Environmental Designers. Van Nostrand Reinhold.
Stein, Sara. 1993. Noah's Garden: Restoring the Ecology of Our Own Backyards. Houghton Mifflin.
Stein, Sara. 1997. Planting Noah's Garden: Further Adventures in Backyard Ecology. Houghton Mifflin.

Winter Tree and Shrub Identification
Campbell, Christopher S. and Hyland, Fay. 1978  Winter Keys to Woody Plants of Maine University of Maine
    Press   Orono, Maine.     ISBN 0-89101-034-3
Harlow, William M. 1959 Fruit Key and Twig Key to Trees and Shrubs Dover Publications, New York.
    ISBN 486-20511-8
Harlow, William M. 1957  Trees of the Eastern and Central United States and Canada  Dover Publications,
    New York.     ISBN 0486-20395-6
Symonds, George W.  D. 1958 The Tree Identification Book Quill (William Morrow), New York. ISBN 0-688-05039-5
Symonds, George W. D. 1963 The Shrub Identification Book  William Morrow & Company, New York.
Rogers, Walter E 1965 Tree Flowers of Forest, Park and Street Dover Publications, New York.ISBN 486-21375-7