Eocene and Oligocene Floras and Vegetation of the Rocky Mountains

1 T ^A (1); Yes of major evolutionary, biogeographic, and vegetational UE ti changes in Sepie plants.From a floristic perspective three major trends characterize this period cky Mo in the Ro ntain region: 1) development of more distinct phytogeographic provinces from a relatively Cana s Paleocene holarctic flora, 2) the early diversification in Eocene upland areas d milies, an) the first appearances of many extant angiosperm Pale evergreen forest to high northern latitudes (60°N), possibly ` the greatest geographic coverage suc ch vegetation everachieved.Thi more open vegetation of lower stature in many areas.These floristic and vegetational trends ` were of great conseq uence for angiosperm evolution and biogeography.They were also significant in creating the ecological milieu for the evolution of early and mid Tertiary animals.