What are rosids?
Q: What are rosids?
A: Rosids are a large clade of flowering plants, which includes about 70,000 species, more than a quarter of all angiosperms.
Q: How many orders are the rosids divided into?
A: The rosids are divided into 17 orders.
Q: How many families do these orders make up?
A: These orders together make up about 140 families.
Q: What is the relationship between rosids and asterids?
A: Rosids and the asterids are by far the largest clades in the eudicots.
Q: When did the rosids originate?
A: 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).
Q: Are there any known fossil rosids?
A: Yes, fossil rosids are known from the Cretaceous period.
Q: Are there different definitions of the rosids?
A: Yes, three different definitions of the rosids are in use. Some authors include the order Saxifragales in the rosids, while others exclude it.
