"The National Plant Germplasm System of the Agricultural Research Service, U.S. Department of Agriculture maintains a computer database, the Germplasm Resources Information Network (GRIN), for the management of and as a source of information on its 568,489 germplasm accessions. The taxonomic portion of GRIN provides the classification and nomenclature for these genetic resources and many other economic plants on a worldwide basis. Included in GRIN TAXONOMY are scientific names for 26,968 genera (14,279 accepted) and 1,375 infragenera (1,316 accepted) and 103,161 species or infraspecies (61,241 accepted) with common names, geographical distributions, literature references, and economic impacts. Generally recognized standards for abbreviating author's names and botanical literature have been adopted in GRIN. The scientific names are verified, in accordance with the international rules of botanical nomenclature, by taxonomists of the National Germplasm Resources Laboratory using available taxonomic literature and consultations with taxonomic specialists. Included in GRIN TAXONOMY are federal- and state-regulated noxious weeds and federally and internationally listed threatened and endangered plants."