Trees in the Yahoo! Directory

Moon Trees
History of the trees whose seeds accompanied the Apollo 14 mission in 1971 and were planted throughout the United States. Includes locations of known trees and links.
nssdc.gsfc.nasa.gov/planetary/lunar/moon_tree.html
Forest and Shade Tree Pathology
Contains information about major diseases that affect trees.
www.forestpathology.org
Neem Foundation
Features Neem and other botanical alternatives.
www.neemfoundation.org
American Chestnut Foundation, The
Contains information on chapters, history, identification, and more. Dedicated to restoration and preservation.
chestnut.acf.org
Wikipedia: Tree
Article about trees, the large, perennial, woody plants, that includes profiles of numerous species.
en.wikipedia.org/wiki/Tree
Elmcare.com
Devoted to all aspects of elm trees and their specialized care with sections dealing with disease, tree physiology, elm trivia, and more.
www.elmcare.com
Garden Tree Information - Popular Gardening Trees
Garden Guides trees section offers a wealth of information on every kind of tree a gardener might want to plant.
www.gardenguides.com/plants/trees
Trees for Life Canada
Children's environmental education program for teachers and leaders. Teaches children about the importance of trees through the "Grow-A-Tree" program.
www.trees4life.ca
Cornell University - Sugar Maple Research and Extension Program
Information about maple tress and collecting sap for syrup.
maple.dnr.cornell.edu
Elm Research Institute
Provides information about the Liberty Elm, an American Elm that is resistant to Dutch Elm disease.
www.libertyelm.com
American Forests' National Register of Big Trees
Features the largest known specimens of native and naturalized trees in the United States.
www.americanforests.org/resources/bigtrees
How to Grow and Maintain Birch Trees
Provides information for the care and selection of a birch tree.
www.birch-tree.com
Trees: Quotes, Poems, Proverbs, Maxims, Links
Collection of quotes for those that love gardens, gardening, and the green way.
www.gardendigest.com/trees.htm
International Ornamental Crabapple Society
Identifies disease-resistant cultivars and provides information to members.
www.malus.net
Trees Are Good
Designed to educate the public about proper tree care. Trees Are Good also addresses the benefits and value of trees along with tree planting information.
www.treesaregood.com
Horse Chestnut Tree
Provides information about the tree, aesculus hippocastanum, which produce conkers, used by kids for the autumnal playground game.
www.rfs.org.uk/thirdlevel.asp?ThirdLevel=63&SecondLevel=34
World Community of Old Trees
Painting and drawings of old trees by students. Includes project ideas for teachers.
www.nyu.edu/projects/julian
Year in the Wonderland of Trees, A
Articles and excerpts on the importance of trees and the environment. The children's textbook answers questions about Fall leaf color, tree and leaf identification, tree growth, and what are the different varieties of trees.
www.publicbookshelf.com/public_html/A_Year_in_the_Wonderland_of_Trees_
Trees of Time and Place
Project encouraging the planting of trees in the new millennium.
www.totap.org.uk
University of Tennessee, Knoxville - Dogwood Research Group
Striving to improve and protect the dogwood tree and its relatives through breeding, research, and public communication.
dogwood.ag.utk.edu