Rare species include sycamore, sassafras and pignut hickory. Also the sassafras, sycamore, white ash. MDMA can be made from safrole, the major constituent of several etheric oils like sassafras. Other trees include sassafras, black gum, and black cherry. Early toothbrushes were crafted from sassafras twigs or wood because of its aromatic properties. Other sassafras leaf browsers include groundhogs, marsh rabbits, and American black bears. Sassafras twigs have been used as toothbrushes and fire starters. More flavors were added including Sassafras Soda and Lithiated Lemon. Some small mammals also consume sassafras fruits. Sassafras wood and oil were both used in dentistry. Sassafras trees are not within the family Saxifragaceae. The genus "Sassafras" includes four species, three extant and one extinct. The genus "Sassafras" was first described by the Bohemian botanist Jan Presl in 1825. The same ex-girlfriend is also the topic of the songs "Sassafras Roots" and "Chump". Rainforest pockets are dominated by jackwood and sassafras.