In which Era were flowering plants abundant?
Mesozoic
During the Mesozoic, or "Middle Life" Era, life diversified rapidly and giant reptiles, dinosaurs and other monstrous beasts roamed on the Earth. The period, which spans from about 252 million years ago to about 66 million years ago, was also known as the age of reptiles or the age of dinosaurs. Life forms that were present during the Mesozoic Period were the only life forms that survived the Paleozoic extinction. Gymnosperms, a group of seed-bearing plants that did not depend on free-standing water for fertilization were some of the few plants that could survive in a drier climate. Gymnosperms quickly became the dominant plants of the Mesozoic era.