During the Mesozoic Era, when the dinosaurs lived, conifers dominated the landscape. These slow-growing evergreen trees and shrubs probably constituted the majority of the herbivorous dinosaurs' diets. Conifers were probably important food for dinosaurs, including the large sauropods.

What kind of trees were around with the dinosaurs?

Arboretum contains more than 200 varieties. When dinosaurs first became numerous in the late Triassic Period, nearly all of the major groups of vascular plants except the angiosperms were in existence. Conifers, cycadophytes, ginkgoes, ferns and large arborescent horsetails dominated the landscape.

Did plants exist before dinosaurs?

Ancient Roots: Flowers May Have Existed When First Dinosaur Was Born. ... Flowering plants, or angiosperms, became the dominant plants about 90 million years ago, when the dinosaurs still roamed the Earth. However, the exact time when these plants originated remains hotly debated.