Connecticut and the region
Endangered and Threatened Plants of Connecticut, from the Department of Environmental Protection.
Go Botany (from the New England Wild Flower Society) is a great resource for information on the plants of New England.
Connecticut Notable Trees pages list historical trees and the largest of a species in Connecticut. Notable Trees is a joint project of the Connecticut College Arboretum and the Connecticut Botanical Society.
NY-NJ-CT Botany Online has a variety of botanical information for the greater New York metropolitan region. The site is especially valuable for its extensive list of botanically interesting natural areas.
Bedrock Map of Connecticut shows in detail the bedrock that underlies each part of the state, along with descriptions of the bedrock types. The map is on the Talcott Mountain Science Center web site, which has other interesting information on Connecticut's geology.
Fungi Images on the Net provides links to 1600 photographs of fungi.
Weed Images from Rutgers University is very helpful for identifying weeds.
Ferns et al. of New England covers a large fraction of our area's ferns and fern allies.
Image Collection of the USDA's Plants National Database has several thousand photographs. It allows searches by name or by several other criteria.
Vascular Plant Image Gallery from Texas A&M University is a very large collection of plant photos. Searches by plant name or family only.
The USDA's PLANTS Database has a distribution map for virtually every plant growing in the U.S.
Flora of North America is a partially completed guide to plants in the U.S. and Canada. Plants are described in detail, with taxonomy, distribution maps, and drawings.
Gymnosperm database has detailed descriptions of over 1000 gymnosperms, such as conifers and cycads. Some plants are pictured.
Tree of Life is a family tree for all living things, starting at the level of kingdoms.
Glossary of botanical terms comes from the Missouri Botanical Garden.
Major biomes of the world provides an introduction to the world's ecological regions.
Seaweed page from the National University of Ireland, Galway provides information on seaweed, some of it aimed at the general public, some for algae experts.
Gardening with Native Plants
University of Connecticut's Plants Database has detailed information on trees, shrubs, and vines for the landscape in the northeast, including many native plants.
Wild Ones Handbook is a guide to natural landscaping, emphasizing plants of the plains region.
Invasive Plant Atlas of New England is a terrific source of information on invasive plants: identification, distribution, means of spread, etc.
Connecticut Invasive Plant Working Group is an organization dedicated to management of and research on invasive plants in the state.
United States Fish and Wildlife Service Endangered Species Information page has information on all plants and animals listed by the federal government as endangered or threatened.
Leafsnap, a field guide to trees designed for mobile devices.
Native Plants Forums at Gardenweb is a place to ask questions or chat about plants native to North America.
SciStarter connects interested members of the public to science projects they can participate in. The site includes hundreds of research projects, including some botany projects, such as monitoring the time of first bloom of native plants and tracking invasive species.
Interesting plant anecdotes can be found at Wayne's Word, written by a professor of botany at Palomar College.
Wildflower Coloring Books has drawings of wildflowers that can be printed out for coloring.
George Safford Torrey Herbarium at UConn
Peabody Museum Herbarium at Yale University