Nomenclatural References
Australian Plant Name Index
Confusable Names
GRIN Families and Genera (USDA)
IAPT Registration Query
Index Fungorum
Index Nominum Genericorum (ING)
Index Nominum Supragenericorum Plantarum Vascularium
Integrated Taxonomic Information System (ITIS)
International Code of Botanical Nomenclature
International Code of Nomenclature for algae, fungi, and plants
International Plant Name Index (IPNI)
Kew Record of Taxonomic Literature
Plant Species Descriptions published in Seed Lists
The Plant List
Tropicos (MO Biblio.)
World Economic Plants