Illustration of plants from five major clades of angiosperms. The five clades are:

• Amborella Clade: Only one species still exists in this oldest branch of angiosperms. Its floral parts have a spiral arrangement.
• Water Lily Clade: The water lilies are another very old group. Early water lily flowers may have been no more than 1 cm across, in contrast to the large and showy water lilies of today.
• Magnoliids: This clade contains a wide range of floral diversity, from species with rather small, plain flowers to the dinner-plate sized Magnolia flower.
• Monocots: This clade contains about 20 percent of all angiosperms. Monocots include several important crop species, such as rice, corn, and wheat, as well as orchids, lilies, and irises.
• Eudicots: About 75 percent of angiosperms are eudicots. This clade is nearly as old as the angiosperms themselves. Eudicots diversified tremendously several times in their history.