Taxonomy database of the U.S. National Center for Biotechnology Information
Global Biodiversity Information Facility
Interim Register of Marine and Nonmarine Genera
Open Tree of Life reference taxonomy version 3.2
An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III
Summary of recent systems of angiosperm classification
An Updated Classification of the Class Magnoliopsida (“Angiospermae”)
An ordinal classification for the families of flowering plants
An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG II
An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG IV
Families and genera of Chinese angiosperms: a synoptic classification based on APG III