Mammilloydia candida - Snowball Cactus.jpg
Taxonomy database of the U.S. National Center for Biotechnology Information
Global Biodiversity Information Facility
Interim Register of Marine and Nonmarine Genera
A farewell to dated ideas and concepts: molecular phylogenetics and a revised suprageneric classification of the family Cactaceae
Die Phylogenie der nordamerikanischen Echinocacteen.Trib. Euechinocactineae F. Buxb.
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
A dataset on inventory and geographical distributions of vascular plants in Beijing, China