Pájara La Lajita - Oasis Park - Pachycereus schottii 04 ies.jpg
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
A new list of threatened woody species in China under future global change scenarios
Families and genera of Chinese angiosperms: a synoptic classification based on APG III