Online Database References

Tree identification

• Plant Database, University of Connecticut College of Agriculture, Health and Natural Resources

http://www.hort.uconn.edu/Plants/

•  Virginia Tech Dendrology Factsheets, Department of Forest Resources and Environmental Conservation

www.dendro.cnre.vt.edu/dendrology/factsheets.cfm

General information on individual species

• The Gymnosperm Database - edited by Christopher J. Earle

  www.conifers.org

• SelecTree: Tree Selection Guide, Urban Forests Ecostystem Institute at California Polytechnic Institute

https://selectree.calpoly.edu/

Invasiveness

• Global Invasive Species Database online (posted as of June 26, 2009)

www.issg.org/database/welcome/

Tallest and oldest trees

• Monumental Trees website: The thickest, tallest and oldest trees worldwide

 www.monumentaltrees.com/en/records/

Print References

General references

• The Book of Leaves by Allen J Coombes edited by Zsolt Debreczy (The University of Chicago Press, 2003)
• Manual of Woody Landscape Plants by Michael A. Dirr (Stipes Publishing,1998)
• New Trees:  Recent Introductions to Cultivation by John Grimshaw and Ross Bayton (Kew Publishing 2009) 
• North American Landscape Trees by Arthur Lee Jacobson (Ten Speed Press, 1996)
• Northwest Trees by Stephen F. Arno and Ramona P. Hammerly (The Mountaineers Books – revised edition 2007)
• Silvics of North America by Russell M. Burns and Barabara Honkala (USDA Forest Service 1990)
• The Tree Book by Michael A. Dirr & Keith S. Warren (Timber Press, 2019)
• Trees for All Seasons by Sean Hogan (Timber Press, 2008)
• Trees of Seattle (second edition) by Arthur Lee Jacobson (2006)
• Trees of the California Landscape by Charles R. Hatch (University of California Press, 2007)
• Uncommon Fruits for Every Garden by Lee Reich (Timber Press, 2004)
• The World Encyclopedia of Trees by Tony Russell, Catherine Cutler, and Martin Walters (Armadillo, 2014)

Genus-specific references

• An Illustrated Guide to Maples by Antoine le Hardy de Beaulieu (Timber Press, 2003)
• Magnolias: A Gardener’s Guide by Jim Gardiner (Timber Press Revised Edition, 1989)
• Oaks of California by Bruce Pavlik, Pamela Muick, Sharon G. Johnson, Marjorie Popper (Cachuma Press, 2002)

Conifers

• A Natural History of Conifers by Aljos Farjon (Timber Press, 2008)
• Conifers of California by Ronald M. Lanner (Cachuma Press, 1999)
• Conifers of the World: The Complete Reference by James E. Eckenwalder (Timber Press, 2009)