An electronic atlas of the plants of British Columbia, with over 8000 pages of information with images.
A website listing primary floras from around the world.
Invasive and Noxious Weeds
Information on invasive plants throughout the USA, including Federal and State Noxious Weed Lists.
USDA PLANTS Database
A database of standardized information for the vascular plants, mosses, liverworts, hornworts, and lichens of the U.S. and its territories. It includes names, plant symbols, checklists, distributional data, species abstracts, characteristics, images, crop information, automated tools, onward Web links, and references.