Vascular Plant Families -
Trees & Shrubs -
Cultivated Plants -
Rare Plants -
Weeds & Invasive Species -
Poisonous Plants -
North America -
Taxonomic Databases -
Miscellany - Glossaries & Dictionaries
Choose one of the links above for a list of plant-related websites about that category. Selected websites include only non-commercial, free-access sites that do not require passwords. The links provided have all been checked as of April 18, 2008, but visitors should note that most large websites have a regular downtime for editing and uploading more information. Often, this downtime occurs on the weekends, especially Sunday night (students take note!). If you find a link that doesn't work, try that site again at a different time or on a different day; if it still does not work, please report the problematic link
to the NOPD.
Trees & Shrubs
British Trees and Shrubs
Part of the excellent British Wildflowers
website by John Somerville.
Dendrology at Iowa State University
An easy-to-navigate website on North American trees by Donald Farrar, Iowa State University.
Descriptive pages feature clear, scanned images showing diagnostic traits, distribution map, and
topographic position. An interactive map of North American forest regions
links to habitat information.
Dendrology at Virginia Tech
The Tree Fact Sheets page of the Dendrology website from Virginia Polytechnic Institute and
State University, Blacksburg, Va., presents identification fact sheets on over 800 species of trees.
Access the species through the list of Angiosperm
. Very useful for all botany students.
FloralImages - Trees of the UK and Ireland
Trees and shrubs from John Crellin's excellent FloralImages
Forestry Images: Forest Health, Natural Resources & Silviculture Images
Images of various forestry-related topics, including silviculture, forest pests, wildlife, and
invasive species, presented in an easily navigated format.
Maples and Japanese Culture
An excellent website dedicated to sharing information on maples of the world, by Hajime
Hayashida, which provides scientific and Japanese common names, foliage autumn colour, and
distribution, as well as a page of images for each species (click on the number at the end of each
line). Comparison pages of leaves, flowers, fruit, and twigs for each species are very useful for
identification. Access this species list for North American maples
choose other species from the home page.
New Brunswick Tree and Shrub Species of Concern
This virtual field guide from the Atlantic Forestry Centre (Canadian Forest Service) provides
excellent information sheets on many species of trees and shrubs native to Nova Scotia and
Ontario. An online glossary of terms is included.
Ontario Trees & Shrubs
A growing website on Ontario woody plants, by Walter Muma, with excellent photos of habitats
as well as diagnostic features. Access the species through this Scientific Names
list, which also includes
common names. A companion to his websites on wildflowers, grasses, ferns, and
A very useful collection of well-written webpages on coniferous and deciduous trees native to
Ohio, most of which are also found in Ontario. An illustrated glossary and keys are included.
Written by T.Davis Sydnor and William F. Cowen, Ohio State University.
Silvics of North America
A website from the USDA; Silvics of North America
, originally published in 1965,
describes the characteristics of about 200 conifers and hardwood trees in North America.
Excellent information on habitat, climate, soils & topography, associated species, life history,
and special uses. Range maps of the tree species include Canada.
Southeastern U.S. Trees and Woody Plants
A website from BioImages
hosted by Vanderbilt University, Nashville, TN. Dendrology students will find the comparisons
species particularly useful.
The Native Trees of the Southern Rocky Mountains
This website, by Stuart Wier, features his excellent black-and-white illustrations of each tree
species and includes key features need for accurate identification.
The Trees of Great Britain and Ireland
A very useful website that provides access to .pdf files of this 7-volume classic work (1906-
1913) by Henry J. Alwes and Augustine Henry, which featured excellent descriptions of trees
native to the United Kingdom, many of which are often planted in North America.
Trees and Bushes of Commanster, Belgium
A website with excellent habitat and closeup images of Belgian conifers and deciduous trees and
shrubs, part of the Ecology of Commanster
website by Jim Lindsey. Plants are organized
according to scientific name, but common names are provided in English, French, Dutch, and
Trees and Shrubs of Wisconsin
A great resources for students. These two websites, by Gary Fewless of the Cofrin Center for
Biodiversity, University of Wisconsin-Green Bay, include an interactive
of terms used in tree and shrub identification, and an interactive key
the Trees of Wisconsin.
Trees of Wisconsin
Shrubs of Wisconsin
Trees in Canada
This website from Natural Resources Canada features a collection of excellent images by Daniel
Tigner of Canada's tree species.
Trees - North Carolina State University and Cooperative Extension Service
A great series of informative Fact Sheets from North Carolina University and Cooperative
Extension, with horticultural information on tree species that grow in the eastern United
Trees of Alabama and the Southeast
A well organized website on trees of the southeast U.S. for dendrology classes, by Lisa
Samuelson, Auburn University. Non-technical descriptions several images of each tree species
are provided; select from the species list along the left side of the webpage.
Trees of Southern California
Another website of excellent image by Michael L. Charters; this one exclusively on tree species.
Each species is represented by an image of the trunk (showing the bark) and the leaves (an or the
Trees of the Northwoods
Part of the extensive Natural History of the Northwoods
websites, by Earl J.S. Rook.
Each webpage includes a single photo, descriptions, and ecological and ethnobotanical
information on each species.
Trees, Shrubs, and Woody Vines of North Carolina
A great website by Will Cook, of Duke Univ., on woody plants from southeastern U.S., with
clear images showing the diagnostic traits of each species.
UCONN Plant Database of Trees, Shrubs, and Vines
A very good website on cultivated plants from the University of Connecticut's Dept. of Plant
Science, including dichotomous keys
woody species and descriptive Plant Pages, accessed here by the alphabetical list of Latin Names
Upper Peninsula Tree Identification Key
An interactive website from the Michigan State University Extension, developed mainly for
grade school students, but still to be appreciated by all botany students.