* International Plant Names Index (IPNI)
* Index Nominum Genericorum (ING) Index of names of genera
* Vascular Plant Family Nomenclature (James Reveal)
* TROPICOS (Missouri Botanical Garden)
* Kew Bibliographic Databases
* Botanists Database (Harvard University Herbaria)
Authors of plant names, collectors of botanical specimens, and authors of botanical publications.
* Publications Database (Harvard University Herbaria)
Titles and abbreviations of botanical publications with authors, dates of publication and BPH and TL2 references.
* International Code of Botanical Nomenclature
* Angiosperm Phylogeny Website
