Modern trees developed during which era?

Modern trees primarily developed during the Mesozoic Era, particularly in the late Triassic to the early Cretaceous periods, around 250 to 145 million years ago. This era saw the emergence of gymnosperms, such as conifers, which became dominant in many ecosystems. AngiOSperms, or flowering plants, began to appear in the late Cretaceous, further diversifying the types of trees we see today. The evolution of these plants significantly shaped terrestrial ecosystems and contributed to the development of modern forests.