HEATKEYS

Invasive Species Mapping Made Easy! EDDMapS is focused on providing a picture of the distribution of invasive species across the U.S. Designed as a tool to develop more complete local, state and regional level distribution data of invasive species, ...

U.S. National Park Service - Experience Your America

The home page for the United States Department of Agriculture PLANTS Database

The University of Rhode Island, a principal public research and graduate institution in the State of Rhode Island, provides undergraduate and graduate education and public service to the state and the nation.

Invasivespeciesinfo.gov -- Reference gateway to information, organizations and services about invasive species; including Federal, State, local, and international sources.

VT Forest Biology and Dendrology offers tree identification, growth, and physiology information.

Home page for the Wisconsin Dept. of Natural Resources.

7000 rare and unusual plants with edible, medicinal or other uses. We place emphasis on creating an ecologically sustainable environment with perennial plants.