kidzsearch.com > wiki Explore:web images videos games
Fossil rosids are known from the Cretaceous period. Molecular clock estimates indicate that the rosids originated in the Aptian or Albian stages of the Cretaceous, between 125 and 99.6 million years ago (mya).
Three different definitions of the rosids are in use. Some authors include the order Saxifragales in the rosids. Others exclude it.