For lepidopteran caterpillars feeding on American beech, see list of Lepidoptera that feed on beeches. American beech is an important tree in forestry. A canopy of oak, American beech, sassafras and black cherry provides cover for smaller shrubs. The mast (crop of nuts) from American beech provides food for numerous species of animals. American beech, pine and hickory can also be found. Examples are the tulip tree (a yellow poplar) and the American beech. The beech blight aphid ("Grylloprociphilus imbricator") is a common pest of American beech trees. Northern hardwood forests include sugar maple ("Acer saccharum") and American beech. Beech drops ("Epifagus virginiana") is a root holoparasite only on American beech ("Fagus grandifolia"). American beech is white with a red tinge and bends readily when steamed. The disease affects the native American beech as well as the commonly planted European beech. American beech is also plentiful in the forest, but is affected by Beech bark scale. Typical trees are American beech, tulip tree, various oaks and hickories, and several other hardwoods.