A Basic Guide to Tree Identification

Wood Barns and More! - Identify that Tree Learning to identify trees can help in understanding and appreciating the various characteristics of wood from that in your barn door to your beautiful hardwood floors.

All About Trees Whether you want information about trees for your landscape project or are identifying the trees in your natural surroundings, these detailed tree resources will provide all of the details you need. From palm trees to oaks, from pines to maples, from saplings to towering giants, you will find everything you desire about trees.

Hortist Resistant trees which are resistant to wind, salt, drought, fire, ice, heat and shade amazingly.

Also from Hortist Flowering trees of tropics

Redwoods - National Geographic Magazine They can grow to be the tallest trees on Earth. They can produce lumber, support jobs, safeguard clear waters, and provide refuge for countless forest species. If we let them.

Here at we're working to gather together a resource for all those interested in the care of trees. We have two of the internet's longest running tree care forums here, with 50,000 searchable pages between them.

The Stump Online Dedicated to the noble tree stump. Features tree stump art, enemies, games, history, how to, pictures, and video.

Trees Are Good A site to educate the public about proper tree care. Trees Are Good also addresses the benefits and value of trees along with tree planting information. An overview of dendrochronology, focusing on dendroclimatology, incremental dating, radiometric dating, geochronology, and dating methodology.

Bighorn Mountains Dendrochronology In August and September of 1998 we collected increment cores from 30-45 of the oldest trees at each of 3 sites along the western base of the Bighorn Mountains, WY, and the Pryor Mountains, MT (table below).

Bristlecone Pine Dendrochronology A look at the dating of trees from the White-Inyo mountain range of California.

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.

The Trees of Stanford web site features over 350 species representing 150 genera and sixty families (over 27,000 individual trees growing on central campus of Stanford!). The heart of the site is the Encyclopedia of Stanford Trees, Shrubs & Vines, which is based on Ron Bracewell's 2005 book Trees of Stanford and Environs.

Natural Resource Skills - Introduction to Tree Identification This site is an illustrated site for beginners on identifying trees and displays various plant habits as a means of illustrating their terminology. The site describes the major phyla and classes of woody plants, and compares monocots and dicots

TreeLinks This site concerns everything you may have wanted to know about trees, including urban forestry, growing trees, keeping trees healthy, flash cards of trees, as well as external links. It is also home for the WoodNotes Quarterly - this quater's current sampling of articles includes Return of the American Elm, A European Perspective: Urban Forests and Trees,

Miami Tree Puzzle This website is a resource to help you learn about these trees, preliminary to a book project now underway. It consists of three tree lists of the 496 most common tree species in the Miami metropolitan area. These lists have been sorted by scientific name, common name, and family. On any of these lists, if you click on the scientific or common name you will be taken to a simple webpage for that species.

American Conifer Society.

The Arbor Day foundation hosts two interactive keys -- one for Eastern and Central US tree identification, and one for Western trees.

The Maple Society Autumn is the highlight of the maple season with the brilliant colours of the Japanese maples in particular - but there are maples for all seasons. Even in winter the snake-bark and paper-bark maples are eye-catching, with others revealing graceful and unusual crown and branch patterns.

The Wollemi Pine is one of the world's oldest and rarest plants dating back to the time of the dinosaurs. With less than 100 adult trees known to exist in the wild, the Wollemi Pine is now the focus of extensive research to safeguard its survival. By 2005/6 you will be able to assist in the conservation effort by growing your own Wollemi Pine and becoming part of one of the most dramatic comebacks in natural history.

Phyllotaxis describes, in mathematical terms, how leaves originate and the numbers underlying their positioning

Science Made Simple is made with K-8 students in mind. At the end, it is essentially AP biology or beginning college botany in its level. The site includes word jumbles, detailed explanations, and "activities to do together" -- inquiry-based examinations of leaf pigmentation. Chromatography of green and leaves that have turned color reveal the individual pigments involved. Lighting and masking leaves tests the effects of light on color development. A nice educational site.

Elizabeth Lawrence wrote  "Nature always wears the colors of the spirit," wrote Emerson. Every fall, Pennsylvania displays its gems - majestic ruby, amber and gold leaves that blend to create a vibrant display of color. Luckily, Pennsylvania's unparalleled autumn colors linger well past the last fallen leaf.

The USDA Forest Service lists fall foliage information for all National Forest locations. This site also has the answer to "Why do leaves change color?"

Tips 4 Trees Healthy trees are an asset. They provide cooling shade, habitat for birds, and can increase the value of your property. This information is provided to help you care for the trees around your residence.

TreeBASE -- Relational database of phylogenetic information sponsored by the NSF, Harvard University Herbaria, and the University of California, Davis.

SUFA's Tree Care Center Info on tree planting, pruning, and general care

USDA Forest Servicefor the Northeastern United States

National Arborist Association

Planting Techniques for Trees and Shrubs A properly planted tree will be more tolerant to adverse conditions and require much less managemnet

Arboriculture On-Line The International Society of Arboriculture (ISA) and the University of Illinois Cooperative States Research, Education, and Extension Service (ICSREES) are offering a one-stop service with links to electronic information at universities, extension services, and other institutions throughout the world that provide up-to-date research-based plant health care information.

The Ancient Bristlecone Pine The oldest living tree.

Urban Forest Ecosystems Institute! We are based in the College of Agriculture at California Polytechnic State University, San Luis Obispo, California. The Urban Forest Ecosystems Institute (UFEI) was developed by the Natural Resources Management Department faculty to address the increasing need for improved management of the urban forests in California.

Preserve colorful beauty of autumn leaves

Fact Sheets for 680 Trees This gateway features 680 tree fact sheets, each presented as three-page pamphlets in portable document format (PDF), requiring the Acrobat Reader (available free from Adobe). Species are listed by family, common name and scientific name. Each guide provides detailed information on the species' growth form, characteristics, U.S. distribution, use & management, pests & diseases and more.
Information on the largest tree in the world. General Sherman

Identification of Conifers

PNW Conifers Genus Page To learn about some of the major genera of conifers in Oregon, click onto each genus name to get more information.

National Christmas Tree Association

Gardenline Fruit to Grow and Pick

The WVV Tree Bark Home This site was designed to provide a place to learn about the anatomy and physiology of tree bark, fungal canker diseases that affect tree bark, the wound responses of injured tree bark, and the role of wound responses in the resistance of living tree bark to wound pathogens.

Organic Tree Care Web Site

TreeLink This site was created to provide information, research, and networking for people working in urban and community forestry.For the researcher, the arborist, the community group leader, the volunteeróour purpose is to inform, educate, and inspire.

The Knot Hole A forum for discussion of arboricultural issues.

American Tree Farm System

The Treehouse The Tree House is intended to be used as a catalogue of Highveld trees, for gardeners in the Gauteng and greater Highveld area who are looking for indigenous hardy plants from their area.

The Hardy Eucalyptus Page

Beautiful Tree offers lengthy descriptions of many varieties. Included are excerpts from the great poets, describing these beauties in their own words.

Drought Tolerant Trees and Plants Trees, shrubs, vines, groundcovers, annuals and perennials that are drought tolerant in the Southeast, Central Plains, Texas, New Mexico, Central Florida and Hawaii. First click on the area, then click on the plant type, just download the entire list. From CNN. Currency

Creek Arboretum (CCA) - specialist eucalypt research arboretum located near Currency Creek, south of Adelaide in South Australia. How to Grow and

Maintain Birch Trees Information for the care, and selection, of a birch tree.

Bigtree fieldtrip This web page presents a pictorial field trip from the Pacific coast of California to the Great Basin in search of the biggest, tallest, oldest trees.  Each image is presented with a script telling about the picture being shown.

Moringa Oleifera Aso known as the Horseradish-tree. Includes information on phytoactive characteristics, and directions for preparation, use, and dosage.

The National Register of Big Trees The largest known specimens of native and naturalized trees in the United States.

The Champion Tree Project Saving the best and the biggest tree specimens for genetic posterity. Vote for your favorites.


New Hope for the American Chestnut
The American Chestnut Foundation Founded in 1983 to restore the American chestnut through a scientific breeding program and cooperative research

Crape Myrtle

Crape Myrtle Culture Horticulturist offers advice and facts about the flowering shrub and tree. Includes notes on planting, pruning, fertilizing, propagating, and diseases.

The Crape Myrtle Society of America

The Crape Myrtle Trails of McKinney FoundationTexas organization working to create a world collection of all known species and varieties of crape myrtles, to be displayed in public area plantings.

Crape Myrtle Varieties and Descriptions Information from PLANTanswers (Texas A&M}.

The Crape Myrtle (Lagerstroemia spp.) Texas Agriculture Experiment State site, providing information about the botany, biology, uses, culture, and management of crape myrtles.


Elm Watch Encouraging the protection of New England's historic and scenic American Elms from Dutch elm disease.

Saskatchewan Dutch Elm Disease Association Working to preserve the American Elm in Saskatchewan. This is a site devoted to the elm tree. All aspects of elm tree care and disease are comprehensively dealt with.

Saving the American Elm


Ginkgo biloba A factsheet from Ohio State University

Introduction to the Ginkgoales This is from with fossil record, life history & ecology info.

Ginkgo biloba Ginkgo tree: from the Japanese Ginkyo meaning "silver apricot" which is the Japanese name of the Ginkgo's seed which is eaten in Japan. This term is thought to come from a phonetic spelling of the Chinese ideogram yin-hsing which is pronounced guinnkyo.


North American Gymonsperms Catalog The Herbarium of the New York Botanical Garden has completed cataloging its gymnosperms from North America north of Mexico. These approximately 10,000 records are available for searching and are arranged according to family.

Gymnosperm Database Description, range, ethnobotany, and other data for all gymnosperms: conifers, cycads, and gnetophytes.


Magnolia Tree Info on several different varieties provided by the editors at Better Homes and Gardens Online.

Magnoliaceae Trees and shrubs comprising 12 genera and about 220 species.

Seed Propagation of Magnolia Information on how to store, handle, and plant magnolia seeds.

The Magnolia Society (TMS) Exchanging plant material, evaluating and promoting magnolia cultivars, educating the garden community, supporting research on magnolias, and serving as the international registration authority on magnolias.

Vascular Plant Image Gallery: Magnoliaceae Photographs of various species' leaves and flowers.

Evolution of a Magnolia Blossom Photographs of how the bud developes, and the transformations the flower goes through.

Fire Effects Information: Magnolia grandiflora Overview of the plants distribution, botanical characteristics, use, fire ecology, and response to fire.

Magnolia grandiflora L.: Southern Magnolia - also called evergreen magnolia, bull-bay, big-laurel, or large-flower magnolia.

Magnolia Society International

Mark Jury's page on Magnolia Trees


California Oak Mortality Task Force Brings together public agencies, nonprofit organizations, and private interests to address the issue of elevated levels of oak mortality.
City of Austin: Oak Wilt Suppression Program Background information on Oak wilt, FAQS, and links.
English Oak Trees Shows complexity and value of the English Oak, otherwise known as the Pedunculate Oak, Common Oak, or universally Quercus Robur.
Interesting Facts about Oak Trees Definitions, information on yearly acorn production, and more.
About Oak Trees This site had been created to inform you about the beautiful trees of the quercus species. Oaks are one of the most common and spectacular species of tree found in the United States. Using this site, you will find detailed information about a wealth of different types of oaks, as well as oak tree pictures, and places where you can buy oak trees.
Sudden Oak Death Resources from CalFlora
University of California Cooperative Extension Sudden Oak Death Practical information on Sudden Oak Death in California.


Unknown Tree - A "find it" key! If you have an unknown specimen, you can try to figure out what it is by using one of our keys
Leaf Identification An instructional unit from the Department of Horticulture at Penn State University. Has information on identifying leaves by structure, shape, groupings, margins, and arrangement.
Basics of Tree Identification Provides information on identifying trees by leaf, bark, fruit, twig, and form. Tree Identification on the Internet Articles and collection of online resources for identifying trees. Includes an online interview to identify the leaves of fifty common native North American trees.

Tree Rings

Laboratory of Tree-Ring Research
Tree Rings and Tree Ring Research
Rocky Mountain Tree-Ring Research Rocky Mountain Tree-Ring Research is a private, nonprofit research organization founded in 1997 by Peter M. Brown (CV).  We provide expertise in tree-ring collection, dating, and analysis to answer a variety of basic and applied questions in fire history, paleoclimatology, and forest ecology and management.  We work with Federal, municipal, and private organizations through cooperative agreements, grants, and contracts.

Trees By State 

Tree Species Distribution Maps for North America Digital Representations of Tree Species Range Maps from "Atlas of United States Trees" by Elbert L. Little, Jr. (and other publications) Background U.S. Forest Service
Native Pines of Eastern North America a tutorial.

A listing of all the states offical Trees.
Trees of Alabama and the Southeast Includes about 200 woody species listed by family and common name.

Arizona's National Champion Trees Native and Naturalized Species


California Oak Mortality Task Force Brings together public agencies, nonprofit organizations, and private interests to address the issue of elevated levels of oak mortality.
The California Register of Big Trees is a program that recognizes and thereby hopes to protect the largest representatives of all tree species in the state. At the extreme are among the largest and oldest living organisms in the world, but some are simply noteworthy representatives of smaller or shorter lived species


Colorado Tree Coalition

Connecticut's Notable Trees

Illinois Big Tree Champons


Trees and Shrubs of the campus of Iowa State University


Big Tree Champions of Maryland

Big Trees of Massachusetts

SW Michigan's Champion Trees
Upper Peninsula Tree Identification Key: ConifersFrom Michigan State University Extension.

Minnesota's native big tree registry

Missouri State Champion Trees

Nebraska Champion Tree Program

New Hampshire
New Jersey
New Jersey's Big Tree Program

New Mexico

New York
Trees New York Information on their programs, services, and urban forestry plus a databank of reference materials.

Although the leaves have not begun to turn in Central Park, you can find autumn color in upstate New York. A calendar of fall events and a New York leaf guide will aid you in planning a weekend visit to the Empire State.

North Carolina
North Dakota
Index of Ohio's Trees
Ohio Big Trees

Oregon Register of Big Trees! 

Pennsylvania State Park Big Tree Program
Pennsylvania on the Fall in PA web site. Live cameras and weekly updates keep you posted on the progression of color in Pennsylvania forests. Click on the link PA Tree Sampler for a list of PA native trees.

Rhode Island
South Carolina
South Carolina Christmas Tree Association's Web Site! You can find the best type of tree and where to get it.

South Dakota
South Dakota Register of Big Trees


Tree FolkAustin's own tree folk



Key to Leaves of Virginia Trees A interactive photographic key to identifying Virginia trees.
Virginia Big Tree Program


West Virginia

Wisconsin's Champion Trees


Trees of other Countries

Australia's Own Living Fossile The Wollemi Pine, scientific information about this rare tree that only exists near Sydney.

The Styx Valley of Tasmania, Australia, contains the tallest angiosperm trees on Earth, Eucalyptus regnans. Some of the tallest may exceed 310 feet in height, second only to the coastal redwoods. Some are more than 400 years old and massive. Ironically, the Styx is on the edge of the Tasmanian Wilderness World Heritage Area-–one of the great temperate wilderness areas on Earth--but not in it. Therefore, this region is available for logging and the methods of regenerating new growth are draconian, involving the extermination of herbivores to assure success. The Wilderness Society of Tasmania (authors of this site) encourages making this into a Valley of the Giants National Park.

Forests of British Columbia Currently, this site contains detailed descriptions of 39 tree species in British Columbia, Canada. Information is available on characteristic features, distribution, size, fruit, flowers, leaves, bark and uses. At least one illustration is provided and in most cases, more. Individual records are linked by common name, with the Latin name given at the top of the description.

Trees of Borneo Genus descriptions and pictures.

Trees and Shrubs of Ontario Species list, descriptions, and photographs.

Resources for Growing trees in Ottawa This page is about growing trees from seed: where to buy seeds or seedlings, how and when to gather seeds and how to grow them.

Trees of the Maritime ForestSearch the list by scientific or common name.

Trees of the Pacific Northwest Tree identification home page from Oregon State University.

The Tree Register A record of ancient, historical, and the largest trees in Great Britain and Ireland.

Canadian Forests

Forest Finland

The Royal Forestry Society

British Trees An introductory guide to the 33 British native trees