- USDA National PLANTS Database and Projects
USDA provides standardized information about the vascular plants, mosses, liverworts, hornworts, and lichens of the U.S. and its territories.
plants.usda.gov
- CalFlora Database
Contains geographic and ecological distribution information for California's plants.
www.calflora.org
- Tropical Plant Database
Providing information and education on the important plants of the Amazon rainforest.
www.rain-tree.com/plants.htm
- INVADERS Database System
Comprehensive database of exotic plant names, distribution records, and regulatory information for the northwestern United States.
invader.dbs.umt.edu
- HortiPlex
Plant database containing images, gardening information, nomenclature data, and links.
hortiplex.gardenweb.com
- University of Connecticut Plant Database
Dedicated to the ornamental attributes, appropriate use, and identification of landscape plants suitable for the Northeast and areas with similar climates. Features online virtual campus walks.
www.hort.uconn.edu/plants
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