GRIN taxonomic data provide the structure and nomenclature for accessions of the National Plant Germplasm System (NPGS), part of the National Genetic Resources Program (NGRP) of the United States Department of Agriculture's (USDA's) Agricultural Research Service (ARS). In GRIN Taxonomy for Plants all families and genera of vascular plants and 51,691 species from throughout the world are represented, especially economic plants and their relatives. Information on scientific and common names, classification, distribution, references, and economic impacts are provided.
The PLANTS Database, a product of the USDA Natural Resources Conservation Service, provides standardized information about the vascular plants, mosses, liverworts, hornworts, and lichens of the U.S. and its territories.
ITIS provides authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world. They are a partnership of U.S., Canadian, and Mexican agencies (ITIS- North America); other organizations; and taxonomic specialists.
The International Plant Names Index (IPNI) is a database of the names and associated basic bibliographical details of seed plants, ferns and lycophytes. Its goal is to eliminate the need for repeated reference to primary sources for basic bibliographic information about plant names. The data are freely available and are gradually being standardized and checked. IPNI will be a dynamic resource, depending on direct contributions by all members of the botanical community.