The rosids are a large group of flowering plants, containing about 70,000 species, more than a quarter of all angiosperms. It is divided into 16 to 20 orders, depending upon circumscription and classification. These orders, in turn, together comprise about 140 families. The rosids and the asterids are by far the largest groups in the eudicots.
↑Hengchang Wang, Michael J. Moore, Pamela S. Soltis, Charles D. Bell, Samuel F. Brockington, Roolse Alexandre, Charles C. Davis, Maribeth Latvis, Steven R. Manchester, and Douglas E. Soltis (10Mar2009), "Rosid radiation and the rapid rise of angiosperm-dominated forests", Proceedings of the National Academy of Sciences 106 (10): 3853–3858, doi:10.1073/pnas.0813376106, PMID 19223592, PMC 2644257
↑Robert W. Scotland and Alexandra H. Wortley (2003), "How many species of seed plants are there?", Taxon 52 (1): 101–104, doi:10.2307/3647306
↑Douglas E. Soltis, Pamela S. Soltis, Peter K. Endress, and Mark W. Chase (2005), Phylogeny and Evolution of the Angiosperms, Sunderland, MA, USA: Sinauer, ISBN 978-0878938179