USDA PLANTS Database

This site provides standardized data about all the plant species, both native and exotic, found in the United State and its territories. Unique among these databases, it includes mosses, liverworts, and other non-vascular plants. Some species have Fact Sheets and Plant Guides available as PDF downloads. (You can find them in the “General Information” box.) These are especially valuable for their detailed descriptions, including ethnobotanical, ecological, and horticultural information pertinent to the species.