National Plants Database -
provides standardized information about the vascular plants, mosses, liverworts, hornworts, and lichens of the U.S. and its territories.
National Wetlands Inventory (NWI) -
produces and provides information on the characteristics, extent, and status of the Nation's wetlands and deepwater habitats and other wildlife habitats.
Web Soil Survey (WSS) -
provides soil data and information produced by the National Cooperative Soil Survey.