Global Biodiversity Information Facility
Interim Register of Marine and Nonmarine Genera
Summary of recent systems of angiosperm classification
An Updated Classification of the Class Magnoliopsida (“Angiospermae”)
An Integrated System of Classification of Flowering Plants
Genera plantarum ad exemplaria imprimis in herbariis kewensibus servata definita
An ordinal classification for the families of flowering plants
Appendix IIB: Conserved and rejected names of families of bryophytes and spermatophytes