Assembling the Tree of Life, Joel Cracraft, Michael J. Donoghue, pp. 159, Oxford University Press, 2004, ISBN 978-0-19-517234-8, ... The most prominent clades of core eudicots are the rosids and asterids, each with thousands of species, along with the smaller Caryophyllales, Santalales, and Saxifragales clades and the very small clade of Berberidopsis and Aextoxicon ...