Sassafras is a genus of three extant and one extinct species of deciduoustrees in the family Lauraceae, native to eastern North America and eastern Asia.[4][5][6] The genus is distinguished by its aromatic properties, which have made the tree useful to humans.
^Breithaupt, B. H (1982). "Paleontology and paleoecology of the Lance Formation (Maastrichtian), east flank of Rock Springs Uplift, Sweetwater County, Wyoming". Contributions to Geology, University of Wyoming. 21 (2).
^Wolfe, Jack A. & Wehr, Wesley C. 1987. The sassafras is an ornamental tree. "Middle Eocene Dicotyledonous Plants from Republic, Northeastern Washington". United States Geological Survey Bulletin1597:13